U.S. patent application number 14/973111 was filed with the patent office on 2017-03-30 for optical image capturing system.
The applicant listed for this patent is ABILITY OPTO-ELECTRONICS TECHNOLOGY CO.LTD.. Invention is credited to HUNG-WEN LEE, PO-JUI LIAO.
Application Number | 20170090152 14/973111 |
Document ID | / |
Family ID | 58408933 |
Filed Date | 2017-03-30 |
United States Patent
Application |
20170090152 |
Kind Code |
A1 |
LIAO; PO-JUI ; et
al. |
March 30, 2017 |
OPTICAL IMAGE CAPTURING SYSTEM
Abstract
A two-piece optical lens for capturing image and a two-piece
optical module for capturing image are provided. In order from an
object side to an image side, the optical lens along the optical
axis includes a first lens with positive refractive power; and a
second lens with refractive power; and at least one of the
image-side surface and object-side surface of each of the two lens
elements are aspheric. The optical lens can increase aperture value
and improve the imagining quality for use in compact cameras.
Inventors: |
LIAO; PO-JUI; (Taichung
City, TW) ; LEE; HUNG-WEN; (Taichung City,
TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
ABILITY OPTO-ELECTRONICS TECHNOLOGY CO.LTD. |
Taichung City |
|
TW |
|
|
Family ID: |
58408933 |
Appl. No.: |
14/973111 |
Filed: |
December 17, 2015 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
G02B 13/003 20130101;
G02B 27/0025 20130101; G02B 9/06 20130101; G02B 3/08 20130101 |
International
Class: |
G02B 13/00 20060101
G02B013/00; G02B 3/08 20060101 G02B003/08; G02B 9/06 20060101
G02B009/06; G02B 27/00 20060101 G02B027/00 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 25, 2015 |
TW |
104131903 |
Claims
1. An optical image capturing system, from an object side to an
image side, comprising: a first lens element with refractive power;
a second lens element with refractive power; and an image plane;
wherein the optical image capturing system consists of two lens
elements with refractive power, at least one of the first and
second lens elements has at least one inflection point on at least
one surface thereof, at least one of the first and second lens
elements has positive refractive power, focal lengths of the first
and second lens elements are f1 and f2 respectively, a focal length
of the optical image capturing system is f, an entrance pupil
diameter of the optical image capturing system is HEP, a distance
on an optical axis from an axial point on an object-side surface of
the first lens element to an axial point on the image plane is HOS,
thicknesses in parallel with an optical axis of the first and
second lens elements at height 1/2 HEP respectively are ETP1 and
ETP2, a sum of ETP1 and ETP2 described above is SETP, thicknesses
of the first and second lens elements on the optical axis
respectively are TP1 and TP2, a sum of TP1 and TP2 described above
is STP, and the following relations are satisfied:
1.2.ltoreq.f/HEP.ltoreq.10.0, 0.5.ltoreq.HOS/f.ltoreq.3 and
0.5.ltoreq.SETP/STP<1.
2. The optical image capturing system of claim 1, wherein a
horizontal distance in parallel with the optical axis from a
coordinate point on the object-side surface of the first lens
element at height 1/2 HEP to the image plane is ETL, a horizontal
distance in parallel with the optical axis from a coordinate point
on the object-side surface of the first lens element at height 1/2
HEP to a coordinate point on the image-side surface of the second
lens element at height 1/2 HEP is EIN, and the following relation
is satisfied: 0.2.ltoreq.EIN/ETL<1.
3. The optical image capturing system of claim 1, wherein a
thickness in parallel with the optical axis of the first lens
element at height 1/2 HEP is ETP1, a thickness in parallel with the
optical axis of the second lens element at height 1/2 HEP is ETP2,
the sum of ETP1 and ETP2 described above is SETP, and the following
relation is satisfied: 0.3.ltoreq.SETP/EIN.ltoreq.0.85.
4. The optical image capturing system of claim 1, wherein the
optical image capturing system comprises a light filtration
element, the light filtration element is located between the second
lens element and the image plane, a distance in parallel with the
optical axis from a coordinate point on the image-side surface of
the second lens element at height 1/2 HEP to the light filtration
element is EIR, a distance in parallel with the optical axis from
an axial point on the image-side surface of the second lens element
to the light filtration element is PIR, and the following relation
is satisfied: 0.5.ltoreq.EIR/PIR.ltoreq.0.8.
5. The optical image capturing system of claim 1, wherein any of
the object-side and image-side surfaces of the second lens element
has at least one inflection point.
6. The optical image capturing system of claim 1, wherein a maximum
height for image formation on the image plane perpendicular to the
optical axis in the optical image capturing system is denoted by
HOI, contrast transfer rates of modulation transfer with space
frequencies of 10 cycles/mm (MTF values) at the optical axis on the
image plane, 0.3 HOI and 0.7 HOI are respectively denoted by MTFE0,
MTFE3 and MTFE7, and the following relations are satisfied:
MTFE0.gtoreq.0.01, MTFE3.gtoreq.0.01, and MTFE7.gtoreq.0.01.
7. The optical image capturing system of claim 1, wherein a half of
maximum view angle of the optical image capturing system is HAF,
and the following relation is satisfied:
0.4.ltoreq.|tan(HAF)|.ltoreq.3.0.
8. The optical image capturing system of claim 1, wherein a
horizontal distance in parallel with the optical axis from a
coordinate point on the image-side surface of the second lens
element at height 1/2 HEP to the image plane is EBL, a horizontal
distance in parallel with the optical axis from an axial point on
the image-side surface of the second lens element to the image
plane is BL, and the following relation is satisfied:
0.8.ltoreq.EBL/BL.ltoreq.1.5.
9. The optical image capturing system of claim 1, further
comprising an aperture stop, a distance from the aperture stop to
the image plane on the optical axis is InS, half of a diagonal of
an effective detection field of the image sensing device is HOI, an
image sensing device is disposed on the image plane, and the
following relations are satisfied: 0.5.ltoreq.InS/HOS.ltoreq.1.5
and 0.ltoreq.HIF/HOI.ltoreq.0.9.
10. An optical image capturing system, from an object side to an
image side, comprising: a first lens element with positive
refractive power; a second lens element with refractive power; and
an image plane; wherein the optical image capturing system consists
of two lens elements with refractive power, the first and second
lens elements respectively has at least one inflection point on at
least one surface thereof, an object-side surface and an image-side
surface of the second lens element are both aspheric, focal lengths
of the first and second lens elements are f1 and f2 respectively, a
focal length of the optical image capturing system is f, an
entrance pupil diameter of the optical image capturing system is
HEP, a distance on an optical axis from an axial point on an
object-side surface of the first lens element to an axial point on
the image plane is HOS, a horizontal distance in parallel with the
optical axis from a coordinate point on the object-side surface of
the first lens element at height 1/2 HEP to the image plane is ETL,
a horizontal distance in parallel with the optical axis from a
coordinate point on the object-side surface of the first lens
element at height 1/2 HEP to a coordinate point on the image-side
surface of the second lens element at height 1/2 HEP is EIN, and
the following relations are satisfied:
1.2.ltoreq.f/HEP.ltoreq.10.0, 0.5.ltoreq.HOS/f.ltoreq.3.0, and
0.2.ltoreq.EIN/ETL<1.
11. The optical image capturing system of claim 10, wherein a
thickness of the first lens element on the optical axis is TP1, a
thickness of the second lens element on the optical axis is TP2,
and the following relation is satisfied:
0.5.ltoreq.TP1/TP2.ltoreq.3.
12. The optical image capturing system of claim 10, wherein a
horizontal distance in parallel with the optical axis from a
coordinate point on the image-side surface of the second lens
element at height 1/2 HEP to a coordinate point on the object-side
surface of the second lens element at height 1/2 HEP is ED12, a
distance from the first lens element to the second lens element on
the optical axis is IN12, and the following relation is satisfied:
0.2.ltoreq.ED12/IN12.ltoreq.10.
13. The optical image capturing system of claim 10, wherein a
thickness in parallel with the optical axis of the first lens
element at height 1/2 HEP is ETP1, a thickness of the first lens
element on the optical axis is TP1, and the following relation is
satisfied: 0.5.ltoreq.ETP1/TP1<1.1.
14. The optical image capturing system of claim 10, wherein a
thickness in parallel with the optical axis of the second lens
element at height 1/2 HEP is ETP2, a thickness of the second lens
element on the optical axis is TP2, and the following relation is
satisfied: 0.5.ltoreq.ETP2/TP2<1.1.
15. The optical image capturing system of claim 10, wherein at
least one of the object-side and image-side surfaces of the least
one of the two lens elements is a Fresnel surface.
16. The optical image capturing system of claim 10, wherein a
distance from the first lens element to the second lens element on
the optical axis is IN12, and the following relation is satisfied:
0<IN12/f.ltoreq.0.3.
17. The optical image capturing system of claim 10, wherein the
optical image capturing system is satisfied: 0 mm<HOS.ltoreq.50
mm.
18. The optical image capturing system of claim 10, wherein at
least one of the first and second lens elements is a light
filtration element with a wavelength of less than 500 nm.
19. The optical image capturing system of claim 10, wherein the
optical image capturing system is satisfied:
0.001.ltoreq.|f/f1|.ltoreq.1.5 and
0.01.ltoreq.|f/f2|.ltoreq.1.5
20. An optical image capturing system, from an object side to an
image side, comprising: a first lens element with positive
refractive power; a second lens element with positive refractive
power; and an image plane; wherein the optical image capturing
system consists of two lens elements with refractive power, at
least one of the object-side and image-side surfaces of the least
one of the two lens elements is a Fresnel surface, focal lengths of
the first and second lens elements are f1 and f2 respectively, a
focal length of the optical image capturing system is f, an
entrance pupil diameter of the optical image capturing system is
HEP, a half of a maximum view angle of the optical image capturing
system is HAF, a distance on an optical axis from an axial point on
an object-side surface of the first lens element to an axial point
on the image plane is HOS, a horizontal distance in parallel with
the optical axis from a coordinate point on the object-side surface
of the first lens element at height 1/2 HEP to the image plane is
ETL, a horizontal distance in parallel with the optical axis from a
coordinate point on the object-side surface of the first lens
element at height 1/2 HEP to a coordinate point on the image-side
surface of the second lens element at height 1/2 HEP is EIN, and
the following relations are satisfied:
1.2.ltoreq.f/HEP.ltoreq.10.0, 0.5.ltoreq.HOS/f.ltoreq.2.5,
0.4.ltoreq.|tan(HAF)|.ltoreq.3.0, and 0.2.ltoreq.EIN/ETL<1.
21. The optical image capturing system of claim 20, wherein a
horizontal distance in parallel with the optical axis from a
coordinate point on the image-side surface of the second lens
element at height 1/2 HEP to the image plane is EBL, a horizontal
distance in parallel with the optical axis from an axial point on
the image-side surface of the second lens element to the image
plane is BL, and the following relation is satisfied:
0.8.ltoreq.EBL/BL.ltoreq.1.5.
22. The optical image capturing system of claim 21, wherein a
distance from the first lens element to the second lens element on
the optical axis is IN12, and the following relation is satisfied:
0<IN12/f.ltoreq.0.3.
23. The optical image capturing system of claim 20, wherein a
maximum height for image formation on the image plane perpendicular
to the optical axis in the optical image capturing system is
denoted by HOI, contrast transfer rates of modulation transfer with
spatial frequencies of 10 cycles/mm at the optical axis on the
image plane, 0.3 HOI and 0.7 HOI are respectively denoted by MTFE0,
MTFE3 and MTFE7, and the following relations are satisfied:
MTFE0.ltoreq.0.01, MTFE3.ltoreq.0.01, and MTFE7.ltoreq.0.01.
24. The optical image capturing system of claim 23, wherein the
optical image capturing system satisfies the following relation: 0
mm<HOS.ltoreq.50 mm.
25. The optical image capturing system of claim 23, further
comprising an aperture stop, an image sensing device and a driving
module, the image sensing device is disposed on the image plane and
with at least hundred thousand-pixels, a distance from the aperture
stop to the image plane on the optical axis is InS, the driving
module couples with the two lens elements to displace the lens
elements, and the following relation is satisfied:
0.5.ltoreq.InS/HOS.ltoreq.1.5.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims the benefit of Taiwan Patent
Application No. 104131903, filed on Sep. 25, 2015, in the Taiwan
Intellectual Property Office, the disclosure of which is
incorporated herein in its entirety by reference.
BACKGROUND OF THE INVENTION
[0002] 1. Field of the Invention
[0003] The present disclosure relates to an optical image capturing
system, and more particularly to a compact optical image capturing
system which can be applied to electronic products.
[0004] 2. Description of the Related Art
[0005] In recent years, with the rise of portable electronic
devices having camera functionalities, the demand for an optical
image capturing system is raised gradually. The image sensing
device of ordinary photographing camera is commonly selected from
charge coupled device (CCD) or complementary metal-oxide
semiconductor sensor (CMOS Sensor). In addition, as advanced
semiconductor manufacturing technology enables the minimization of
pixel size of the image sensing device, the development of the
optical image capturing system directs towards the field of high
pixels. Therefore, the requirement for high imaging quality is
rapidly raised.
[0006] The traditional optical image capturing system of a portable
electronic device comes with different designs, and mainly includes
a second-lens design. However, the requirement for the higher
pixels and the requirement for a large aperture of an end user,
like functionalities of micro filming and night view, or the
requirement of wide view angle of the portable electronic device
have been raised. But the optical image capturing system with the
large aperture design often produces more aberration resulting in
the deterioration of quality in peripheral image formation and
difficulties of manufacturing, and the optical image capturing
system with wide view angle design increases distortion rate in
image formation, thus the optical image capturing system in prior
arts cannot meet the requirement of the higher order camera lens
module.
[0007] Therefore, how to effectively increase quantity of incoming
light and view angle of the optical lenses, not only further
improves total pixels and imaging quality for the image formation,
but also considers the equity design of the miniaturized optical
lenses, becomes a quite important issue.
SUMMARY OF THE INVENTION
[0008] The aspect of embodiment of the present disclosure directs
to an optical image capturing system and an optical image capturing
lens which use combination of refractive powers, convex and concave
surfaces of two-piece optical lenses (the convex or concave surface
in the disclosure denotes the geometrical shape of an image-side
surface or an object-side surface of each lens on an optical axis)
to increase the quantity of incoming light of the optical image
capturing system and the view angle of the optical lenses, and to
improve total pixels and imaging quality for image formation, so as
to be applied to minimized electronic products.
[0009] The term and its definition to the lens element parameter in
the embodiment of the present invention are shown as below for
further reference.
[0010] The lens element parameter related to a length or a height
in the lens element
A height for image formation of the optical image capturing system
is denoted by HOI. A height of the optical image capturing system
is denoted by HOS. A distance from the object-side surface of the
first lens element to the image-side surface of the second lens
element is denoted by InTL. A distance from the image-side surface
of the second lens element to an image plane is denoted by InB, and
InTL+InB=HOS A distance from an aperture stop (aperture) to an
image plane is denoted by InS. A distance from the first lens
element to the second lens element is denoted by IN12 (instance). A
central thickness of the first lens element of the optical image
capturing system on the optical axis is denoted by TP1
(instance).
[0011] The lens element parameter related to a material in the lens
element
An Abbe number of the first lens element in the optical image
capturing system is denoted by NA1 (instance). A refractive index
of the first lens element is denoted by Nd1 (instance).
[0012] The lens element parameter related to a view angle in the
lens element
A view angle is denoted by AF. Half of the view angle is denoted by
HAF. A major light angle is denoted by MRA.
[0013] The lens element parameter related to exit/entrance pupil in
the lens element
An entrance pupil diameter of the optical image capturing system is
denoted by HEP. A maximum effective half diameter (EHD) of any
surface of a single lens element refers to a perpendicular height
between an intersection point on the surface of the lens element
where the incident light with the maximum view angle in the optical
system passes through the outmost edge of the entrance pupil and
the optical axis. For example, the maximum effective half diameter
of the object-side surface of the first lens element is denoted by
EHD 11. The maximum effective half diameter of the image-side
surface of the first lens element is denoted by EHD 12. The maximum
effective half diameter of the object-side surface of the second
lens element is denoted by EHD 21. The maximum effective half
diameter of the image-side surface of the second lens element is
denoted by EHD 22. The maximum effective half diameters of any
surfaces of other lens elements in the optical image capturing
system are denoted in the similar way.
[0014] The lens element parameter related to a depth of the lens
element shape
A distance in parallel with an optical axis from a maximum
effective diameter position to an axial point on the object-side
surface of the second lens element is denoted by InRS11 (instance).
A distance in parallel with an optical axis from a maximum
effective diameter position to an axial point on the image-side
surface of the second lens element is denoted by InRS22
(instance).
[0015] The lens element parameter related to the lens element
shape
A critical point C is a tangent point on a surface of a specific
lens element, and the tangent point is tangent to a plane
perpendicular to the optical axis and the tangent point cannot be a
crossover point on the optical axis. To follow the past, a distance
perpendicular to the optical axis between a critical point C11 on
the object-side surface of the first lens element and the optical
axis is HVT11 (instance). A distance perpendicular to the optical
axis between a critical point C12 on the image-side surface of the
first lens element and the optical axis is HVT12 (instance). A
distance perpendicular to the optical axis between a critical point
C21 on the object-side surface of the second lens element and the
optical axis is HVT21 (instance). A distance perpendicular to the
optical axis between a critical point C22 on the image-side surface
of the second lens element and the optical axis is HVT22
(instance). Distances perpendicular to the optical axis between
critical points on the object-side surfaces or the image-side
surfaces of other lens elements and the optical axis are denoted in
the similar way described above.
[0016] The object-side surface of the second lens element has one
inflection point IF211 which is nearest to the optical axis, and
the sinkage value of the inflection point IF211 is denoted by
SGI211 (instance). SGI211 is a horizontal shift distance in
parallel with the optical axis from an axial point on the
object-side surface of the second lens element to the inflection
point which is nearest to the optical axis on the object-side
surface of the second lens element. A distance perpendicular to the
optical axis between the inflection point IF211 and the optical
axis is HIF211 (instance). The image-side surface of the second
lens element has one inflection point IF221 which is nearest to the
optical axis and the sinkage value of the inflection point IF221 is
denoted by SGI221 (instance). SGI221 is a horizontal shift distance
in parallel with the optical axis from an axial point on the
image-side surface of the second lens element to the inflection
point which is nearest to the optical axis on the image-side
surface of the second lens element. A distance perpendicular to the
optical axis between the inflection point IF221 and the optical
axis is HIF221 (instance).
[0017] The object-side surface of the second lens element has one
inflection point IF212 which is the second nearest to the optical
axis and the sinkage value of the inflection point IF212 is denoted
by SGI212 (instance). SGI212 is a horizontal shift distance in
parallel with the optical axis from an axial point on the
object-side surface of the second lens element to the inflection
point which is the second nearest to the optical axis on the
object-side surface of the second lens element. A distance
perpendicular to the optical axis between the inflection point
IF212 and the optical axis is HIF212 (instance). The image-side
surface of the second lens element has one inflection point IF222
which is the second nearest to the optical axis and the sinkage
value of the inflection point IF222 is denoted by SGI222
(instance). SGI222 is a horizontal shift distance in parallel with
the optical axis from an axial point on the image-side surface of
the second lens element to the inflection point which is the second
nearest to the optical axis on the image-side surface of the second
lens element. A distance perpendicular to the optical axis between
the inflection point IF222 and the optical axis is HIF222
(instance).
[0018] The object-side surface of the second lens element has one
inflection point IF213 which is the third nearest to the optical
axis and the sinkage value of the inflection point IF213 is denoted
by SGI213 (instance). SGI213 is a horizontal shift distance in
parallel with the optical axis from an axial point on the
object-side surface of the second lens element to the inflection
point which is the third nearest to the optical axis on the
object-side surface of the second lens element. A distance
perpendicular to the optical axis between the inflection point
IF213 and the optical axis is HIF213 (instance). The image-side
surface of the second lens element has one inflection point IF223
which is the third nearest to the optical axis and the sinkage
value of the inflection point IF223 is denoted by SGI223
(instance). SGI223 is a horizontal shift distance in parallel with
the optical axis from an axial point on the image-side surface of
the second lens element to the inflection point which is the third
nearest to the optical axis on the image-side surface of the second
lens element. A distance perpendicular to the optical axis between
the inflection point IF223 and the optical axis is HIF223
(instance).
[0019] The object-side surface of the second lens element has one
inflection point IF214 which is the fourth nearest to the optical
axis and the sinkage value of the inflection point IF214 is denoted
by SGI214 (instance). SGI214 is a horizontal shift distance in
parallel with the optical axis from an axial point on the
object-side surface of the second lens element to the inflection
point which is the fourth nearest to the optical axis on the
object-side surface of the second lens element. A distance
perpendicular to the optical axis between the inflection point
IF614 and the optical axis is HIF214 (instance). The image-side
surface of the second lens element has one inflection point IF224
which is the fourth nearest to the optical axis and the sinkage
value of the inflection point IF224 is denoted by SGI224
(instance). SGI224 is a horizontal shift distance in parallel with
the optical axis from an axial point on the image-side surface of
the second lens element to the inflection point which is the fourth
nearest to the optical axis on the image-side surface of the second
lens element. A distance perpendicular to the optical axis between
the inflection point IF224 and the optical axis is HIF224
(instance).
[0020] The inflection points on the object-side surfaces or the
image-side surfaces of the other lens elements and the distances
perpendicular to the optical axis thereof or the sinkage values
thereof are denoted in the similar way described above.
[0021] The lens element parameter related to an aberration
Optical distortion for image formation in the optical image
capturing system is denoted by ODT. TV distortion for image
formation in the optical image capturing system is denoted by TDT.
Further, the range of the aberration offset for the view of image
formation may be limited to 50%-100%. An offset of the spherical
aberration is denoted by DFS. An offset of the coma aberration is
denoted by DFC.
[0022] The vertical coordinate axis of the characteristic diagram
of modulation transfer function represents a contrast transfer rate
(values are from 0 to 1). The horizontal coordinate axis represents
a spatial frequency (cycles/mm; 1 p/mm; line pairs per mm).
Theoretically, an ideal image capturing system can 100% show the
line contrast of a photographed object. However, the values of the
contrast transfer rate at the vertical coordinate axis are smaller
than 1 in the actual image capturing system. The transfer rate of
its comparison value is less than a vertical axis. In addition,
comparing to the central region, it is generally more difficult to
achieve a fine degree of recovery in the edge region of image
capturing. The contrast transfer rates (MTF values) with spatial
frequencies of 10 cycles/m at the optical axis, 0.3 field of view
and 0.7 field of view of a visible spectrum on the image plane are
respectively denoted by MTFE0, MTFE3 and MTFE7. The contrast
transfer rates (MTF values) with spatial frequencies of 20 cycles/m
at the optical axis, 0.3 field of view and 0.7 field of view on the
image plane are respectively denoted by MTFQ0, MTFQ3 and MTFQ7. The
contrast transfer rates (MTF values) with spatial frequencies of 40
cycles/m at the optical axis, 0.3 field of view and 0.7 field of
view on the image plane are respectively denoted by MTFH0, MTFH3
and MTFH7. The contrast transfer rates (MTF values) with spatial
frequencies of 440 cycles/m at the optical axis, 0.3 field of view
and 0.7 field of view on the image plane are respectively denoted
by MTF0, MTF3 and MTF7. The three fields of view described above
are representative to the centre, the internal field of view and
the external field of view of the lens elements. Thus, they may be
used to evaluate whether the performance of a specific optical
image capturing system is excellent. The design of the optical
image capturing system of the present invention mainly corresponds
to a pixel size in which a sensing device below 1.12 micrometers is
includes. Therefore, the quarter spatial frequencies, the half
spatial frequencies (half frequencies) and the full spatial
frequencies (full frequencies) of the characteristic diagram of
modulation transfer function respectively are at least 110
cycles/mm, 220 cycles/mm and 440 cycles/mm.
[0023] If an optical image capturing system needs to satisfy with
the images aimed to infrared spectrum, such as the requirement for
night vision with lower light source, the used wavelength may be
850 nm or 800 nm. As the main function is to recognize shape of an
object formed in monochrome and shade, the high resolution is
unnecessary, and thus, a spatial frequency, which is less than 110
cycles/mm, is used to evaluate the functionality of the optical
image capturing system, when the optical image capturing system is
applied to the infrared spectrum. When the foregoing wavelength 850
nm is applied to focus on the image plane, the contrast transfer
rates (MTF values) with a spatial frequency of 55 cycles/mm at the
optical axis, 0.3 field of view and 0.7 field of view on the image
plane are respectively denoted by MTFI0, MTFI3 and MTFI7. However,
the infrared wavelength of 850 nm or 800 nm may be hugely different
to wavelength of the regular visible light wavelength, and thus, it
is hard to design an optical image capturing system which has to
focus on the visible light and the infrared light (dual-mode)
simultaneously while achieve a certain function respectively.
[0024] The disclosure provides an optical image capturing system,
an object-side surface or an image-side surface of the second lens
element may have inflection points, such that the angle of
incidence from each view field to the second lens element can be
adjusted effectively and the optical distortion and the TV
distortion can be corrected as well. Besides, the surfaces of the
second lens element may have a better optical path adjusting
ability to acquire better imaging quality.
[0025] The disclosure provides an optical image capturing system,
in order from an object side to an image side, including a first
lens element, a second lens element, and an image plane. The first
lens element has refractive power. Focal lengths of the first and
the second lens elements are f1 and f2 respectively. A focal length
of the optical image capturing system is f. An entrance pupil
diameter of the optical image capturing system is HEP. A distance
from an object-side surface of the first lens element to the image
plane is HOS. Thicknesses in parallel with an optical axis of the
first and second lens elements at height 1/2 HEP respectively are
ETP1 and ETP2. A sum of ETP1 to ETP2 described above is SETP.
Thicknesses of the first and second lens elements on the optical
axis respectively are TP1 and TP2. A sum of TP1 and TP2 described
above is STP. The following relations are satisfied:
1.2.ltoreq.f/HEP.ltoreq.10.0 and 0.5.ltoreq.SETP/STP<1.
[0026] The disclosure provides another optical image capturing
system, in order from an object side to an image side, including a
first lens element, second lens element and an image plane. The
first lens element has positive refractive power, and the position
near the optical axis on an object-side surface of the first lens
element may be a convex surface. The second lens element has
refractive power, and an object-side surface and an image-side
surface of the second lens element are aspheric. Any of the first
and the second lens elements has at least one inflection point on
at least one surface thereof. Focal lengths of the first and the
second lens elements are f1 and f2 respectively. A focal length of
the optical image capturing system is f. An entrance pupil diameter
of the optical image capturing system is HEP. A distance from an
object-side surface of the first lens element to the image plane is
HOS. A horizontal distance in parallel with the optical axis from a
coordinate point on the object-side surface of the first lens
element at height 1/2 HEP to the image plane is ETL. A horizontal
distance in parallel with the optical axis from a coordinate point
on the object-side surface of the first lens element at height 1/2
HEP to a coordinate point on the image-side surface of the second
lens element at height 1/2 HEP is EIN. The following relations are
satisfied: 1.2.ltoreq.f/HEP.ltoreq.10.0 and
0.2.ltoreq.EIN/ETL<1.
[0027] The disclosure provides another optical image capturing
system, in order from an object side to an image side, including a
first lens element, a lens element second, and an image plane. At
least one of an object-side surface and an image-side surface of
the second lens element has at least one inflection point, wherein
the optical image capturing system of the present disclosure has
two lens elements with refractive power, and any of the two lens
elements respectively has at least one inflection point on at least
one surface thereof. The first lens element has positive refractive
power. The second lens element has positive refractive power and an
object-side surface and an image-side surface of the second lens
element are both aspheric. Focal lengths of the first and second
lens elements are f1 and f2 respectively. A focal length of the
optical image capturing system is f. An entrance pupil diameter of
the optical image capturing system is HEP. A half of maximum view
angle of the optical image capturing system is HAF. A distance from
an object-side surface of the first lens element to the image plane
is HOS. A horizontal distance in parallel with the optical axis
from a coordinate point on the object-side surface of the first
lens element at height 1/2 HEP to the image plane is ETL. A
horizontal distance in parallel with the optical axis from a
coordinate point on the object-side surface of the first lens
element at height 1/2 HEP to a coordinate point on the image-side
surface of the second lens element at height 1/2 HEP is EIN. The
following relations are satisfied: 1.2.ltoreq.f/HEP.ltoreq.10;
0.4.ltoreq.|tan(HAF)|.ltoreq.6.0 and 0.2.ltoreq.EIN/ETL<1.
[0028] A thickness of a single lens element at height of 1/2
entrance pupil diameter (HEP) particularly affects the corrected
aberration of common area of each field of view of light and the
capability of correcting optical path difference between each field
of view of light in the scope of 1/2 entrance pupil diameter (HEP).
The capability of aberration correction is enhanced if the
thickness becomes greater, but the difficulty for manufacturing is
also increased at the same time. Therefore, it is necessary to
control the thickness of a single lens element at height of 1/2
entrance pupil diameter (HEP), in particular to control the ratio
relation (ETP/TP) of the thickness (ETP) of the lens element at
height of 1/2 entrance pupil diameter (HEP) to the thickness (TP)
of the lens element to which the surface belongs on the optical
axis. For example, the thickness of the first lens element at
height of 1/2 entrance pupil diameter (HEP) is denoted by ETP1. The
thickness of the second lens element at height of 1/2 entrance
pupil diameter (HEP) is denoted by ETP2. The thicknesses of other
lens elements are denoted in the similar way. A sum of ETP1 and
ETP2 described above is SETP. The embodiments of the present
invention may satisfy the following relation:
0.3.ltoreq.SETP/EIN<1.
[0029] In order to enhance the capability of aberration correction
and reduce the difficulty for manufacturing at the same time, it is
particularly necessary to control the ratio relation (ETP/TP) of
the thickness (ETP) of the lens element at height of 1/2 entrance
pupil diameter (HEP) to the thickness (TP) of the lens element on
the optical axis lens. For example, the thickness of the first lens
element at height of 1/2 entrance pupil diameter (HEP) is denoted
by ETP1. The thickness of the first lens element on the optical
axis is TP1. The ratio between both of them is ETP1/TP1. The
thickness of the second lens element at height of 1/2 entrance
pupil diameter (HEP) is denoted by ETP2. The thickness of the
second lens element on the optical axis is TP2. The ratio between
both of them is ETP2/TP2. The ratio relations of the thicknesses of
other lens element in the optical image capturing system at height
of 1/2 entrance pupil diameter (HEP) to the thicknesses (TP) of the
lens elements on the optical axis lens are denoted in the similar
way. The embodiments of the present invention may satisfy the
following relation: 0.2.ltoreq.ETP/TP.ltoreq.3.
[0030] A horizontal distance between two adjacent lens elements at
height of 1/2 entrance pupil diameter (HEP) is denoted by ED. The
horizontal distance (ED) described above is in parallel with the
optical axis of the optical image capturing system and particularly
affects the corrected aberration of common area of each field of
view of light and the capability of correcting optical path
difference between each field of view of light at the position of
1/2 entrance pupil diameter (HEP). The capability of aberration
correction may be enhanced if the horizontal distance becomes
greater, but the difficulty for manufacturing is also increased and
the degree of `miniaturization` to the length of the optical image
capturing system is restricted. Thus, it is essential to control
the horizontal distance (ED) between two specific adjacent lens
elements at height of 1/2 entrance pupil diameter (HEP).
[0031] In order to enhance the capability of aberration correction
and reduce the difficulty for `miniaturization` to the length of
the optical image capturing system at the same time, it is
particularly necessary to control the ratio relation (ED/IN) of the
horizontal distance (ED) between the two adjacent lens elements at
height of 1/2 entrance pupil diameter (HEP) to the horizontal
distance (IN) between the two adjacent lens elements on the optical
axis. For example, the horizontal distance between the first lens
element and the second lens element at height of 1/2 entrance pupil
diameter (HEP) is denoted by ED12. The horizontal distance between
the first lens element and the second lens element on the optical
axis is IN12. The ratio between both of them is ED12/IN12. The
ratio relations of the horizontal distances between other two
adjacent lens elements in the optical image capturing system at
height of 1/2 entrance pupil diameter (HEP) to the horizontal
distances between the two adjacent lens elements on the optical
axis are denoted in the similar way.
[0032] A horizontal distance in parallel with the optical axis from
a coordinate point on the image-side surface of the second lens
element at height 1/2 HEP to the image plane is EBL. A horizontal
distance in parallel with the optical axis from an axial point on
the image-side surface of the second lens element to the image
plane is BL. The embodiments of the present invention enhance the
capability of aberration correction and reserve space for
accommodating other optical elements. The following relation may be
satisfied: 0.2.ltoreq.EBL/BL<1.1. The optical image capturing
system may further include a light filtration element. The light
filtration element is located between the second lens element and
the image plane. A distance in parallel with the optical axis from
a coordinate point on the image-side surface of the second lens
element at height 1/2 HEP to the light filtration element is EIR. A
distance in parallel with the optical axis from an axial point on
the image-side surface of the second lens element to the light
filtration element is PIR. The embodiments of the present invention
may satisfy the following relation:
0.1.ltoreq.EIR/PIR.ltoreq.1.1.
[0033] The optical image capturing system described above may be
configured to form the image on the image sensing device which is
shorter than 1/1.2 inch in diagonal length. The pixel size of the
image sensing device is smaller than 1.4 micrometers (.mu.m).
preferably the pixel size thereof is smaller than 1.12 micrometers
(.mu.m). The best pixel size thereof is smaller than 0.9
micrometers (.mu.m). Furthermore, the optical image capturing
system is applicable to the image sensing device with aspect ratio
of 16:9.
[0034] The optical image capturing system described above is
applicable to the demand of video recording with above millions or
ten millions-pixels and leads to a good imaging quality.
[0035] The height of optical system (HOS) may be reduced to achieve
the minimization of the optical image capturing system when the
absolute value of f1 is larger than f1 (|f1|>f2).
[0036] When the second lens element has the weak positive
refractive power, the positive refractive power of the second lens
element can be shared, such that the unnecessary aberration will
not appear too early. On the contrary, when the second lens element
has the weak negative refractive power, the aberration of the
optical image capturing system can be corrected and fine tuned.
[0037] The second lens element may have positive refractive power
and a concave image-side surface. Hereby, the back focal length is
reduced for keeping the miniaturization, to miniaturize the lens
element effectively. In addition, at least one of the object-side
surface and the image-side surface of the second lens element may
have at least one inflection point, such that the angle of incident
with incoming light from an off-axis view field can be suppressed
effectively and the aberration in the off-axis view field can be
corrected further.
BRIEF DESCRIPTION OF THE DRAWINGS
[0038] The detailed structure, operating principle and effects of
the present disclosure will now be described in more details
hereinafter with reference to the accompanying drawings that show
various embodiments of the present disclosure as follows.
[0039] FIG. 1A is a schematic view of the optical image capturing
system according to the first embodiment of the present
application.
[0040] FIG. 1B is longitudinal spherical aberration curves,
astigmatic field curves, and an optical distortion grid of the
optical image capturing system in the order from left to right
according to the first embodiment of the present application.
[0041] FIG. 1C is a characteristic diagram of modulation transfer
of a visible light according to the first embodiment of the present
application.
[0042] FIG. 2A is a schematic view of the optical image capturing
system according to the second embodiment of the present
application.
[0043] FIG. 2B is longitudinal spherical aberration curves,
astigmatic field curves, and an optical distortion grid of the
optical image capturing system in the order from left to right
according to the second embodiment of the present application.
[0044] FIG. 2C is a characteristic diagram of modulation transfer
of a visible light according to the second embodiment of the
present application.
[0045] FIG. 3A is a schematic view of the optical image capturing
system according to the third embodiment of the present
application.
[0046] FIG. 3B is longitudinal spherical aberration curves,
astigmatic field curves, and an optical distortion grid of the
optical image capturing system in the order from left to right
according to the third embodiment of the present application.
[0047] FIG. 3C is a characteristic diagram of modulation transfer
of a visible light according to the third embodiment of the present
application.
[0048] FIG. 4A is a schematic view of the optical image capturing
system according to the fourth embodiment of the present
application.
[0049] FIG. 4B is longitudinal spherical aberration curves,
astigmatic field curves, and an optical distortion grid of the
optical image capturing system in the order from left to right
according to the fourth embodiment of the present application.
[0050] FIG. 4C is a characteristic diagram of modulation transfer
of a visible light according to the fourth embodiment of the
present application.
[0051] FIG. 5A is a schematic view of the optical image capturing
system according to the fifth embodiment of the present
application.
[0052] FIG. 5B is longitudinal spherical aberration curves,
astigmatic field curves, and an optical distortion grid of the
optical image capturing system in the order from left to right
according to the fifth embodiment of the present application.
[0053] FIG. 5C is a characteristic diagram of modulation transfer
of a visible light according to the fifth embodiment of the present
application.
[0054] FIG. 6A is a schematic view of the optical image capturing
system according to the sixth embodiment of the present
application.
[0055] FIG. 6B is longitudinal spherical aberration curves,
astigmatic field curves, and an optical distortion grid of the
optical image capturing system in the order from left to right
according to the sixth embodiment of the present application.
[0056] FIG. 6C is a characteristic diagram of modulation transfer
of a visible light according to the sixth embodiment of the present
application.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0057] Reference will now be made in detail to the exemplary
embodiments of the present disclosure, examples of which are
illustrated in the accompanying drawings. Therefore, it is to be
understood that the foregoing is illustrative of exemplary
embodiments and is not to be construed as limited to the specific
embodiments disclosed, and that modifications to the disclosed
exemplary embodiments, as well as other exemplary embodiments, are
intended to be included within the scope of the appended claims.
These embodiments are provided so that this disclosure will be
thorough and complete, and will fully convey the inventive concept
to those skilled in the art. The relative proportions and ratios of
elements in the drawings may be exaggerated or diminished in size
for the sake of clarity and convenience in the drawings, and such
arbitrary proportions are only illustrative and not limiting in any
way. The same reference numbers are used in the drawings and the
description to refer to the same or like parts.
[0058] It will be understood that, although the terms `first`,
`second`, `third`, etc., may be used herein to describe various
elements, these elements should not be limited by these terms. The
terms are used only for the purpose of distinguishing one component
from another component. Thus, a first element discussed below could
be termed a second element without departing from the teachings of
embodiments. As used herein, the term "or" includes any and all
combinations of one or more of the associated listed items.
[0059] An optical image capturing system, in order from an object
side to an image side, includes a first, second, third, fourth,
fifth and sixth lens elements with refractive power and an image
plane. The optical image capturing system may further include an
image sensing device which is disposed on an image plane.
[0060] The optical image capturing system may use three sets of
wavelengths which are 486.1 nm, 587.5 nm and 656.2 nm,
respectively, wherein 587.5 nm is served as the primary reference
wavelength and a reference wavelength for retrieving technical
features. The optical image capturing system may also use five sets
of wavelengths which are 470 nm, 510 nm, 555 nm, 610 nm and 650 nm,
respectively, wherein 555 nm is served as the primary reference
wavelength and a reference wavelength for retrieving technical
features.
[0061] A ratio of the focal length f of the optical image capturing
system to a focal length fp of each of lens elements with positive
refractive power is PPR. A ratio of the focal length f of the
optical image capturing system to a focal length fn of each of lens
elements with negative refractive power is NPR. A sum of the PPR of
all lens elements with positive refractive power is .SIGMA.PPR. A
sum of the NPR of all lens elements with negative refractive powers
is .SIGMA.NPR. It is beneficial to control the total refractive
power and the total length of the optical image capturing system
when following conditions are satisfied:
0.5.ltoreq..SIGMA.PPR/|.SIGMA.NPR|.ltoreq.4.5. Preferably, the
following relation may be satisfied:
1.ltoreq..SIGMA.PPR/|.SIGMA.NPR|.ltoreq.3.8.
[0062] The height of the optical image capturing system is HOS. It
will facilitate the manufacturing of miniaturized optical image
capturing system which may form images with ultra high pixels when
the specific ratio value of HOS/f tends to 1.
[0063] A sum of a focal length fp of each lens element with
positive refractive power is .SIGMA.PP. A sum of a focal length fn
of each lens element with negative refractive power is .SIGMA.NP.
In one embodiment of the optical image capturing system of the
present disclosure, the following relations are satisfied:
0<.SIGMA.PP.ltoreq.200 and f1/.SIGMA.PP.ltoreq.0.85. Preferably,
the following relations may be satisfied: 0<.SIGMA.PP.ltoreq.150
and 0.01.ltoreq.f1/.SIGMA.PP.ltoreq.0.6. Hereby, it's beneficial to
control the focus ability of the optical image capturing system and
allocate the positive refractive power of the optical image
capturing system appropriately, so as to suppress the significant
aberration generating too early. The first lens element has
positive refractive power and a convex object-side surface. The
first lens element may have positive refractive power, and it has a
convex object-side surface. Hereby, strength of the positive
refractive power of the first lens element can be fined-tuned, so
as to reduce the total length of the optical image capturing
system.
[0064] The optical image capturing system may further include an
image sensing device which is disposed on an image plane. Half of a
diagonal of an effective detection field of the image sensing
device (imaging height or the maximum image height of the optical
image capturing system) is HOI. A distance on the optical axis from
the object-side surface of the first lens element to the image
plane is HOS. The following relations are satisfied:
HOS/HOI.ltoreq.3 and 0.5.ltoreq.HOS/f.ltoreq.3.0. Preferably, the
following relations may be satisfied: 1.ltoreq.HOS/HOI.ltoreq.2.5
and 1.ltoreq.HOS/f.ltoreq.2. Hereby, the miniaturization of the
optical image capturing system can be maintained effectively, so as
to be carried by lightweight portable electronic devices.
[0065] In addition, in the optical image capturing system of the
disclosure, according to different requirements, at least one
aperture stop may be arranged for reducing stray light and
improving the imaging quality.
[0066] In the optical image capturing system of the disclosure, the
aperture stop may be a front or middle aperture. The front aperture
is the aperture stop between a photographed object and the first
lens element. The middle aperture is the aperture stop between the
first lens element and the image plane. If the aperture stop is the
front aperture, a longer distance between the exit pupil and the
image plane of the optical image capturing system can be formed,
such that more optical elements can be disposed in the optical
image capturing system and the efficiency of receiving images of
the image sensing device can be raised. If the aperture stop is the
middle aperture, the view angle of the optical image capturing
system can be expended, such that the optical image capturing
system has the same advantage that is owned by wide angle cameras.
A distance from the aperture stop to the image plane is InS. The
following relation is satisfied: 0.5.ltoreq.InS/HOS.ltoreq.1.1.
Preferably, the following relation may be satisfied:
0.6.ltoreq.InS/HOS.ltoreq.1. Hereby, features of maintaining the
minimization for the optical image capturing system and having
wide-angle are available simultaneously.
[0067] In the optical image capturing system of the disclosure, a
distance from the object-side surface of the first lens element to
the image-side surface of the second lens element is InTL. A sum of
central thicknesses of all lens elements with refractive power on
the optical axis is .SIGMA.TP. The following relation is satisfied:
0.45.ltoreq..SIGMA.TP/InTL.ltoreq.0.95. Hereby, contrast ratio for
the image formation in the optical image capturing system and
defect-free rate for manufacturing the lens element can be given
consideration simultaneously, and a proper back focal length is
provided to dispose other optical components in the optical image
capturing system.
[0068] A curvature radius of the object-side surface of the first
lens element is R1. A curvature radius of the image-side surface of
the first lens element is R2. The following relation is satisfied:
0.1.ltoreq.|R1/R2|.ltoreq.3.0. Hereby, the first lens element may
have proper strength of the positive refractive power, so as to
avoid the longitudinal spherical aberration to increase too fast.
Preferably, the following relation may be satisfied:
0.1.ltoreq.|R1/R2|.ltoreq.2.0.
[0069] A curvature radius of the object-side surface of the second
lens element is R3. A curvature radius of the image-side surface of
the second lens element is R4. The following relation is satisfied:
-200<(R3-R4)/(R3+R4)<30. Hereby, the astigmatism generated by
the optical image capturing system can be corrected
beneficially.
[0070] A distance between the first lens element and the second
lens element on the optical axis is IN12. The following relation is
satisfied: 0<IN12/f.ltoreq.0.30. Preferably, the following
relation may be satisfied: 0.01.ltoreq.IN12/f.ltoreq.0.25. Hereby,
the chromatic aberration of the lens elements can be improved, such
that the performance can be increased.
[0071] Central thicknesses of the first lens element and the second
lens element on the optical axis are TP1 and TP2, respectively. The
following relation is satisfied: 2.ltoreq.(TP1+IN12)/TP2.ltoreq.10.
Hereby, the sensitivity produced by the optical image capturing
system can be controlled, and the performance can be increased.
[0072] The optical image capturing system of the disclosure
satisfies with the following relation:
0.1.ltoreq.TP1/TP2.ltoreq.0.6. Hereby, the reduction of the total
height of optical system can be given consideration simultaneously
and the ability of correcting the aberration can be improved.
[0073] A distance in parallel with an optical axis from a maximum
effective diameter position to an axial point on the object-side
surface of the second lens element is denoted by InRS21 (instance).
A distance in parallel with an optical axis from a maximum
effective diameter position to an axial point on the image-side
surface of the second lens element is denoted by InRS22 (instance).
A thickness of the second lens element on the optical axis is
TP2.
[0074] In the optical image capturing system of the disclosure, a
distance in parallel with an optical axis from an inflection point
on the object-side surface of the second lens element which is
nearest to the optical axis to an axial point on the object-side
surface of the second lens element is denoted by SGI211. A distance
in parallel with an optical axis from an inflection point on the
image-side surface of the second lens element which is nearest to
the optical axis to an axial point on the image-side surface of the
second lens element is denoted by SGI221.
[0075] A distance in parallel with the optical axis from the
inflection point on the object-side surface of the second lens
element which is the second nearest to the optical axis to an axial
point on the object-side surface of the fourth lens element is
denoted by SGI212. A distance in parallel with an optical axis from
an inflection point on the image-side surface of the second lens
element which is the second nearest to the optical axis to an axial
point on the image-side surface of the second lens element is
denoted by SGI222.
[0076] A distance perpendicular to the optical axis between the
inflection point on the object-side surface of the second lens
element which is nearest to the optical axis and the optical axis
is denoted by HIF211. A distance perpendicular to the optical axis
between an inflection point on the image-side surface of the second
lens element which is nearest to the optical axis and an axial
point on the image-side surface of the second lens element is
denoted by HIF221.
[0077] A distance perpendicular to the optical axis between the
inflection point on the object-side surface of the second lens
element which is the second nearest to the optical axis and the
optical axis is denoted by HIF212. A distance perpendicular to the
optical axis between an axial point on the image-side surface of
the second lens element and an inflection point on the image-side
surface of the second lens element which is the second nearest to
the optical axis is denoted by HIF222.
[0078] A distance perpendicular to the optical axis between the
inflection point on the object-side surface of the second lens
element which is the third nearest to the optical axis and the
optical axis is denoted by HIF213. A distance perpendicular to the
optical axis between an axial point on the image-side surface of
the second lens element and an inflection point on the image-side
surface of the second lens element which is the third nearest to
the optical axis is denoted by HIF223.
[0079] A distance perpendicular to the optical axis between the
inflection point on the object-side surface of the second lens
element which is the fourth nearest to the optical axis and the
optical axis is denoted by HIF214. A distance perpendicular to the
optical axis between an axial point on the image-side surface of
the second lens element and an inflection point on the image-side
surface of the second lens element which is the fourth nearest to
the optical axis is denoted by HIF224.
[0080] In one embodiment of the optical image capturing system of
the present disclosure, the chromatic aberration of the optical
image capturing system can be corrected by alternatively arranging
the lens elements with large Abbe number and small Abbe number.
[0081] The above Aspheric formula is:
z=ch.sup.2/[1+[1-(k+1)c.sup.2h.sup.2].sup.0.5]+A4h.sup.4+A6h.sup.6+A8h.s-
up.8+A10h.sup.10+A12h.sup.12+A14h.sup.14+A16h.sup.16+A18h.sup.18+A20h.sup.-
20+ (1),
where z is a position value of the position along the optical axis
and at the height h which reference to the surface apex; k is the
conic coefficient, c is the reciprocal of curvature radius, and A4,
A6, A8, A10, A12, A14, A16, A18, and A20 are high order aspheric
coefficients.
[0082] The optical image capturing system provided by the
disclosure, the lens elements may be made of glass or plastic
material. If plastic material is adopted to produce the lens
elements, the cost of manufacturing will be lowered effectively. If
lens elements are made of glass, the heat effect can be controlled
and the designed space arranged for the refractive power of the
optical image capturing system can be increased. Besides, the
object-side surface and the image-side surface of the first and the
second lens elements may be aspheric, so as to obtain more control
variables. Comparing with the usage of traditional lens element
made by glass, the number of lens elements used can be reduced and
the aberration can be eliminated. Thus, the total height of the
optical image capturing system can be reduced effectively.
[0083] In addition, in the optical image capturing system provided
by the disclosure, if the lens element has a convex surface, the
surface of the lens element adjacent to the optical axis is convex
in principle. If the lens element has a concave surface, the
surface of the lens element adjacent to the optical axis is concave
in principle.
[0084] Besides, in the optical image capturing system of the
disclosure, according to different requirements, at least one
aperture may be arranged for reducing stray light and improving the
imaging quality.
[0085] In the optical image capturing system of the disclosure, the
aperture stop may be a front or middle aperture. The front aperture
is the aperture stop between a photographed object and the first
lens element. The middle aperture is the aperture stop between the
first lens element and the image plane. If the aperture stop is the
front aperture, a longer distance between the exit pupil and the
image plane of the optical image capturing system can be formed,
such that more optical elements can be disposed in the optical
image capturing system and the effect of receiving images of the
image sensing device can be raised. If the aperture stop is the
middle aperture, the view angle of the optical image capturing
system can be expended, such that the optical image capturing
system has the same advantage that is owned by wide angle
cameras.
[0086] The optical image capturing system of the disclosure can be
adapted to the optical image capturing system with automatic focus
if required. With the features of a good aberration correction and
a high quality of image formation, the optical image capturing
system can be used in various application fields.
[0087] The optical image capturing system of the disclosure can
include a driving module according to the actual requirements. The
driving module may be coupled with the lens elements to enable the
lens elements producing displacement. The driving module may be the
voice coil motor (VCM) which is applied to move the lens to focus,
or may be the optical image stabilization (OIS) which is applied to
reduce the distortion frequency owing to the vibration of the lens
while shooting.
[0088] At least one of the first and second lens elements of the
optical image capturing system of the disclosure may further be
designed as a light filtration element with a wavelength of less
than 500 nm according to the actual requirement. The light filter
element may be made by coating at least one surface of the specific
lens element characterized of the filter function, and
alternatively, may be made by the lens element per se made of the
material which is capable of filtering short wavelength.
[0089] According to the above embodiments, the specific embodiments
with figures are presented in detail as below.
The First Embodiment
Embodiment 1
[0090] Please refer to FIG. 1A, FIG. 1B, and FIG. 1C. FIG. 1A is a
schematic view of the optical image capturing system according to
the first embodiment of the present application, FIG. 1B is
longitudinal spherical aberration curves, astigmatic field curves,
and an optical distortion curve of the optical image capturing
system in the order from left to right according to the first
embodiment of the present application, and FIG. 1C is a
characteristic diagram of modulation transfer of a visible light
according to the first embodiment of the present application. As
shown in FIG. 1A, in order from an object side to an image side,
the optical image capturing system includes an aperture stop 100, a
first lens element 110, a second lens element 120, an IR-bandstop
filter 170, an image plane 180, and an image sensing device
190.
[0091] The first lens element 110 has positive refractive power and
it is made of plastic material. The first lens element 110 has a
convex object-side surface 112 and a concave image-side surface
114, and both of the object-side surface 112 and the image-side
surface 114 are aspheric. The thickness of the first lens element
on the optical axis is TP1. The thickness of the first lens element
at height of 1/2 entrance pupil diameter (HEP) is denoted by
ETP1.
[0092] The second lens element 120 has positive refractive power
and it is made of plastic material. The second lens element 120 has
a convex object-side surface 122 and a concave image-side surface
124, and both of the object-side surface 122 and the image-side
surface 124 are aspheric and have an inflection point. A distance
in parallel with an optical axis from an inflection point on the
object-side surface of the second lens element which is nearest to
the optical axis to an axial point on the object-side surface of
the second lens element is denoted by SGI211. A distance in
parallel with an optical axis from an inflection point on the
image-side surface of the second lens element which is nearest to
the optical axis to an axial point on the image-side surface of the
second lens element is denoted by SGI221. The following relations
are satisfied: SGI211=0.0082 mm, SGI221=0.0017 mm,
|SGI211|/(|SGI211|+TP2)=0.02 and |SGI221|/(|SGI221|+TP2)=0.002. The
thickness of the second lens element on the optical axis is TP2,
and the thickness of the second lens element at height of 1/2
entrance pupil diameter (HEP) is denoted by ETP2.
[0093] A distance perpendicular to the optical axis from the
inflection point on the object-side surface of the second lens
element which is nearest to the optical axis to an axial point on
the object-side surface of the second lens element is denoted by
HIF111. A distance perpendicular to the optical axis from the
inflection point on the image-side surface of the second lens
element which is nearest to the optical axis to an axial point on
the image-side surface of the second lens element is denoted by
HIF121. The following relations are satisfied: HIF111=0.2041 mm,
HIF121=0.2073 mm, HIF111/HOI=0.2041, and HIF121/HOI=0.2073.
[0094] In the first embodiment, a horizontal distance in parallel
with the optical axis from a coordinate point on the object-side
surface of the first lens element at height 1/2 HEP to the image
plane is ETL. A horizontal distance in parallel with the optical
axis from a coordinate point on the object-side surface of the
first lens element at height 1/2 HEP to a coordinate point on the
image-side surface of the second lens element at height 1/2 HEP is
EIN. The following relations are satisfied: ETL=1.862 mm, EIN=1.011
mm and EIN/ETL=0.543.
[0095] The first embodiment satisfies the following relations:
ETP1=0.386 mm, ETP2=0.346 mm. A sum of ETP1 and ETP2 described
above SETP=0.732 mm. TP1=0.402 mm and TP2=0.357 mm. A sum of TP1
and TP2 described above STP=0.758 mm. SETP/STP=0.965.
SETP/EIN=0.724.
[0096] The present embodiment particularly controls the ratio
relation (ETP/TP) of the thickness (ETP) of each lens element at
height of 1/2 entrance pupil diameter (HEP) to the thickness (TP)
of the lens element to which the surface belongs on the optical
axis in order to achieve a balance between manufacturability and
capability of aberration correction. The following relations are
satisfied: ETP1/TP1=0.960 and ETP2/TP2=0.969.
[0097] The present embodiment controls a horizontal distance
between each two adjacent lens elements at height of 1/2 entrance
pupil diameter (HEP) to achieve a balance between the degree of
miniaturization for the length of the optical image capturing
system HOS, the manufacturability and the capability of aberration
correction. The ratio relation (ED/IN) of the horizontal distance
(ED) between the two adjacent lens elements at height of 1/2
entrance pupil diameter (HEP) to the horizontal distance (IN)
between the two adjacent lens elements on the optical axis is
particularly controlled. The following relations are satisfied: a
horizontal distance in parallel with the optical axis between the
first lens element and the second lens element at height of 1/2
entrance pupil diameter (HEP) ED12=0.279 mm.
[0098] In the optical image capturing system of the first
embodiment, a distance between the first lens element 110 and the
second lens element 120 on the optical axis is IN12. The following
relations are satisfied: IN12=0.334 mm and ED12/IN12=0.837.
[0099] A horizontal distance in parallel with the optical axis from
a coordinate point on the image-side surface of the second lens
element at height 1/2 HEP to the image plane EBL=0.851 mm. A
horizontal distance in parallel with the optical axis from an axial
point on the image-side surface of the second lens element to the
image plane BL=0.8357 mm. The embodiment of the present invention
may satisfy the following relation: EBL/BL=1.0183. In the present
invention, a distance in parallel with the optical axis from a
coordinate point on the image-side surface of the second lens
element at height 1/2 HEP to the IR-bandstop filter EIR=0.001 mm. A
distance in parallel with the optical axis from an axial point on
the image-side surface of the second lens element to the
IR-bandstop filter PIR=0.004 mm. The following relation is
satisfied: EIR/PIR=0.268.
[0100] The IR-bandstop filter 170 is made of glass material without
affecting the focal length of the optical image capturing system
and it is disposed between the second lens element 120 and the
image plane 180.
[0101] In the optical image capturing system of the first
embodiment, a focal length of the optical image capturing system is
f, an entrance pupil diameter of the optical image capturing system
is HEP, and half of a maximal view angle of the optical image
capturing system is HAF. The detailed parameters are shown as
below: f=1.5270 mm, f/HEP=2.52, HAF=32.4537.degree. and
tan(HAF)=0.6359.
[0102] In the optical image capturing system of the first
embodiment, a focal length of the first lens element 110 is f1 and
a focal length of the first lens element 110 is f1. The following
relations are satisfied: f1=1.8861 mm; f2=4.6465 mm, |f/f1|=0.8096,
|f1|<f2, and |f1/f2|=0.4059.
[0103] A ratio of the focal length f of the optical image capturing
system to a focal length fp of each of lens elements with positive
refractive power is PPR. A ratio of the focal length f of the
optical image capturing system to a focal length fn of each of lens
elements with negative refractive power is NPR. In the optical
image capturing system of the first embodiment, a sum of the PPR of
all lens elements with positive refractive power is
.SIGMA.PPR=f/f1+f/f2=1.1382. A sum of the NPR of all lens elements
with negative refractive powers is NPR=f/f2=0.4650,
|.SIGMA.PPR|.SIGMA.NPR|=3.0391. The following relations are also
satisfied: |f/f3|=0.3439, |f1/f2|=0.4349, and |f2/f3|=0.7396.
[0104] In the optical image capturing system of the first
embodiment, a distance from the object-side surface 112 of the
first lens element to the image-side surface 124 of the second lens
element is InTL. A distance from the object-side surface 112 of the
first lens element to the image plane 180 is HOS. A distance from
an aperture 100 to an image plane 180 is InS. Half of a diagonal
length of an effective detection field of the image sensing device
190 is HOI. A distance from the image-side surface 124 of the
second lens element to the image plane 180 is BFL. The following
relations are satisfied: InTL+InB=HOS, HOS=1.9461 mm, HOI=1.0 mm,
HOS/HOI=1.9461, HOS/f=1.2745, InTL/HOS=0.5613, InS=1.8621 mm, and
InS/HOS=0.9568.
[0105] In the optical image capturing system of the first
embodiment, a total central thickness of all lens elements with
refractive power on the optical axis is .SIGMA.TP. The following
relations are satisfied: .SIGMA.TP=0.7585 mm and
.SIGMA.TP/InTL=0.6943. Hereby, contrast ratio for the image
formation in the optical image capturing system and defect-free
rate for manufacturing the lens element can be given consideration
simultaneously, and a proper back focal length is provided to
dispose other optical components in the optical image capturing
system.
[0106] In the optical image capturing system of the first
embodiment, a curvature radius of the object-side surface 112 of
the first lens element is R1. A curvature radius of the image-side
surface 114 of the first lens element is R2. The following relation
is satisfied: |R1/R2|=0.6866. Hereby, the first lens element may
have proper strength of the positive refractive power, so as to
avoid the longitudinal spherical aberration to increase too
fast.
[0107] In the optical image capturing system of the first
embodiment, a curvature radius of the object-side surface 122 of
the second lens element is R3. A curvature radius of the image-side
surface 124 of the second lens element is R4. The following
relation is satisfied: (R3-R4)/(R3+R4)=-0.7542. Hereby, the
astigmatism generated by the optical image capturing system can be
corrected beneficially.
[0108] In the optical image capturing system of the first
embodiment, focal lengths of the first and the second lens elements
are f1 and f2 respectively. A sum of focal lengths of all lens
elements with positive refractive power is .SIGMA.PP. The following
relations are satisfied: .SIGMA.PP=f1+f2=6.5326 mm and
f1/(f1+f2)=0.2887. Hereby, it is favorable for allocating the
positive refractive power of the first lens element 110 to other
positive lens elements and the significant aberrations generated in
the process of moving the incident light can be suppressed.
[0109] In the optical image capturing system of the first
embodiment, the focal length of the second lens element 120 is f2.
A sum of focal lengths of all lens elements with negative
refractive power is/NP.
[0110] In the optical image capturing system of the first
embodiment, a distance between the first lens element 110 and the
second lens element 120 on the optical axis is IN12. The following
relations are satisfied: IN12=0.3340 mm and IN12/f=0.2187. Hereby,
the chromatic aberration of the lens elements can be improved, such
that the performance can be increased.
[0111] In the optical image capturing system of the first
embodiment, central thicknesses of the first lens element 110 and
the second lens element 120 on the optical axis are TP1 and TP2,
respectively. The following relations are satisfied: TP1=0.4020 mm,
TP2=0.3365 mm, and (TP1+IN12)/TP2=2.0643. Hereby, the sensitivity
produced by the optical image capturing system can be controlled,
and the performance can be increased.
[0112] In the optical image capturing system of the first
embodiment, the following relations are satisfied: TP1/TP2=1.1275.
Hereby, the aberration generated by the process of moving the
incident light can be adjusted slightly layer upon layer, and the
total height of the optical image capturing system can be
reduced.
[0113] In the optical image capturing system of the first
embodiment, a total central thickness of the first lens element 110
and the second lens element 120 on the optical axis is .SIGMA.TP.
The following relations are satisfied: TP2/.SIGMA.TP=0.4436.
Hereby, the aberration generated by the process of moving the
incident light can be adjusted slightly layer upon layer, and the
total height of the optical image capturing system can be
reduced.
[0114] In the optical image capturing system of the first
embodiment, a distance in parallel with an optical axis from a
maximum effective diameter position to an axial point on the
object-side surface 112 of the first lens element is InRS11. A
distance in parallel with an optical axis from a maximum effective
diameter position to an axial point on the image-side surface 114
of the first lens element is InRS12. A central thickness of the
first lens element 110 is TP1. The following relations are
satisfied: InRS11=0.084 mm, InRS12=0.0478 mm,
|InRS11|+|InRS12|=0.1318 mm, |InRS11|/TP1=0.2091, and
|InRS12|/TP1=0.1188. Hereby, it is favorable for manufacturing and
forming the lens element and for maintaining the minimization for
the optical image capturing system.
[0115] In the optical image capturing system of the first
embodiment, a distance perpendicular to the optical axis between a
critical point C11 on the object-side surface 112 of the first lens
element and the optical axis is HVT11. A distance perpendicular to
the optical axis between a critical point C22 on the image-side
surface 114 of the first lens element and the optical axis is
HVT12. The following relations are satisfied: HVT11=0 mm and
HVT12=0 mm.
[0116] In the optical image capturing system of the first
embodiment, a distance in parallel with an optical axis from a
maximum effective diameter position to an axial point on the
object-side surface 122 of the second lens element is InRS21. A
distance in parallel with an optical axis from a maximum effective
diameter position to an axial point on the image-side surface 124
of the second lens element is InRS22. A central thickness of the
second lens element 120 is TP2. The following relations are
satisfied: InRS21=-0.0167 mm, InRS22=-0.1294 mm,
|InRS21|+|InRS22|=0.1461 mm, |InRS21|/TP2=0.468, and
|InRS22|/TP2=0.3629. Hereby, it is favorable for manufacturing and
forming the lens element and for maintaining the minimization for
the optical image capturing system.
[0117] In the optical image capturing system of the first
embodiment, a distance perpendicular to the optical axis between a
critical point C21 on the object-side surface 122 of the second
lens element and the optical axis is HVT21. A distance
perpendicular to the optical axis between a critical point C22 on
the image-side surface 124 of the second lens element and the
optical axis is HVT22. The following relations are satisfied:
HVT21=0.3318 mm and HVT22=0.2980 mm and HVT21/HVT22=1.1134. Hereby,
the aberration of surrounding view field can be corrected.
[0118] In the optical image capturing system of the first
embodiment, the following relation is satisfied: HVT22/HOI=0.2980.
Hereby, the aberration of surrounding view field can be
corrected.
[0119] In the optical image capturing system of the first
embodiment, the following relation is satisfied: HVT22/HOS=0.1531
Hereby, the aberration of surrounding view field can be
corrected.
[0120] In the optical image capturing system of the first
embodiment, an Abbe number of the first lens element is NA1. An
Abbe number of the second lens element is NA2. The following
relations are satisfied: |NA1-NA2|=32.6166 and NA1/NA2=2.3934.
Hereby, the chromatic aberration of the optical image capturing
system can be corrected.
[0121] In the optical image capturing system of the first
embodiment, TV distortion and optical distortion for image
formation in the optical image capturing system are TDT and ODT,
respectively. The following relations are satisfied: |TDT|=1.1552%,
|ODT|=2.1305%.
[0122] In the optical image capturing system of the present
embodiment, contrast transfer rates of modulation transfer with
spatial frequencies of 10 cycles/mm of a visible light at the
optical axis on the image plane, 0.3 HOI and 0.7 HOI are
respectively denoted by MTFE0, MTFE3 and MTFE7. The following
relations are satisfied: MTFE0 is about 0.96, MTFE3 is about 0.95
and MTFE7 is about 0.94. The contrast transfer rates of modulation
transfer with spatial frequencies of 20 cycles/mm of a visible
light at the optical axis on the image plane, 0.3 HOI and 0.7 HOI
are respectively denoted by MTFQ0, MTFQ3 and MTFQ7. The following
relations are satisfied: MTFQ0 is about 0.93, MTFQ3 is about 0.9
and MTFQ7 is about 0.9.
[0123] Please refer to the following Table 1 and Table 2.
The detailed data of the optical image capturing system of the
first embodiment is as shown in Table 1.
TABLE-US-00001 TABLE 1 Data of the optical image capturing system f
= 1.5270 mm, f/HEP = 2.52, HAF(tan) = 32.4537 deg, tan(HAF) =
0.6359 Surface # Curvature Radius Thickness Material Index Abbe #
Focal length 0 Object Plano 600 1 Ape. stop Plano 0.040 2 Lens 1
0.593622567 0.402 Plastic 1.632 23.42 1.886 3 0.864566511 0.151 4
Shading sheet Plano 0.183 5 Lens 2 2.149136259 0.357 Plastic 1.531
56.04 4.646 6 IR-bandstop filter 15.33826532 0.004 BK7_SCHOTT 7
Plano 0.850 8 Image plane Plano Reference wavelength (d-line) = 555
nm, shield position: clear aperture (CA) of the fourth plano =
0.350 mm
As for the parameters of the aspheric surfaces of the first
embodiment, reference is made to Table 2.
TABLE-US-00002 TABLE 2 Aspheric Coefficients Surface # 2 3 5 6 k =
-1.260209E+00 3.752697E+00 -1.533461E+02 -3.276814E+03 A4 =
1.188727E-01 3.780380E-01 8.967125E-01 5.109782E-01 A6 =
2.594904E+01 -4.741825E+00 -1.657671E+01 -6.908232E+00 A8 =
-3.720166E+02 6.830764E+01 8.794850E+01 2.187913E+01 A10 =
1.911424E+03 -9.125034E+01 -2.651957E+02 -3.274673E+01 A12 =
7.243751E+03 -2.289203E+03 1.980490E+02 -1.512005E+01 A14 =
-7.265856E+04 1.532097E+04 2.486960E+02 8.852130E+01 A16 =
1.667886E+03 -3.062662E+04 1.832814E+02 -7.275365E+01 A18 =
0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 A20 = 0.00000E+00
0.00000E+00 0.00000E+00 0.00000E+00
[0124] Table 1 is the detailed structure data to the first
embodiment in FIG. 1A, wherein the unit of the curvature radius,
the thickness, the distance, and the focal length is millimeters
(mm). Surfaces 0-16 illustrate the surfaces from the object side to
the image plane in the optical image capturing system. Table 2 is
the aspheric coefficients of the first embodiment, wherein k is the
conic coefficient in the aspheric surface formula, and A1-A20 are
the first to the twentieth order aspheric surface coefficient.
Besides, the tables in the following embodiments are referenced to
the schematic view and the aberration graphs, respectively, and
definitions of parameters in the tables are equal to those in the
Table 1 and the Table 2, so the repetitious details will not be
given here.
The Second Embodiment
Embodiment 2
[0125] Please refer to FIG. 2A, FIG. 2B, and FIG. 2C. FIG. 2A is a
schematic view of the optical image capturing system according to
the second embodiment of the present application, FIG. 2B is
longitudinal spherical aberration curves, astigmatic field curves,
and an optical distortion curve of the optical image capturing
system in the order from left to right according to the second
embodiment of the present application, and FIG. 2C is a
characteristic diagram of modulation transfer of a visible light
according to the second embodiment of the present application. As
shown in FIG. 2A, in order from an object side to an image side,
the optical image capturing system includes an aperture stop 200, a
first lens element 210, a second lens element 220, an image plane
280, and an image sensing device 290. The object-side surface of
the present embodiment, which is applied to the display designed
with Full-HD or WQHD resolution such as HD 1080p display, is served
as the purpose of the virtual reality. The imaging system of the
present embodiment is designed with the resolution of 10.6
pixel/degree or 5.6 arcmin/pixel.
[0126] The first lens element 210 has positive refractive power and
it is made of plastic material. The first lens element 210 has a
convex object-side surface 212 and a convex image-side surface 214,
and both of the object-side surface 212 and the image-side surface
214 are aspheric. The image-side surface 214 has an inflection
point.
[0127] The second lens element 220 has positive refractive power
and it is made of plastic material. The second lens element 220 has
a convex object-side surface 222 and a concave image-side surface
224, and both of the object-side surface 222 and the image-side
surface 224 are aspheric and have an inflection point.
[0128] In the optical image capturing system of the present
embodiment, contrast transfer rates of modulation transfer with
spatial frequencies of 10 cycles/mm of a visible light at the
optical axis on the image plane, 0.3 HOI and 0.7 HOI are
respectively denoted by MTFE0, MTFE3 and MTFE7. The following
relations are satisfied: MTFE0 is about 0.85, MTFE3 is about 0.27
and MTFE7 is about 0.25.
[0129] Please refer to the following Table 3 and Table 4.
The detailed data of the optical image capturing system of the
second embodiment is as shown in Table 3.
TABLE-US-00003 TABLE 3 Data of the optical image capturing system f
= 29.0140 mm; f/HEP = 6.9081; HAF(tan) = 50 deg Surface # Curvature
Radius Thickness Material Index Abbe # Focal length 0 Object Plano
600 1 Shading sheet Plano 0.500 2 Ape. stop Plano 9.500 3 Lens 1
1221.130564 9.924 Plastic 1.491 57.21 43.2287 4 -21.61239783 0.104
5 Lens 2 11.6803482 5.974 Plastic 1.585 29.90 149.8060 6
10.91266851 21.000 7 Plano 0.000 BK7_SCHOTT 1.517 64.13 8 Plano
0.000 9 Image plane Plano 0.000 Reference wavelength (d-line) = 555
nm; shield position: The clear aperture of the first surface is
2.10 mm. The clear aperture of the fourth surface is 14.0 mm.
As for the parameters of the aspheric surfaces of the second
embodiment, reference is made to Table 4.
TABLE-US-00004 TABLE 4 Aspheric Coefficients Surface # 3 4 5 6 k =
9.000000E+02 9.943093E-03 -2.424460E+00 -1.647759E+00 A4 =
8.336907E-05 -1.710684E-04 -6.633458E-05 1.822323E-04 A6 =
-5.505972E-06 1.259224E-06 3.012070E-06 -3.346886E-06 A8 =
1.867790E-07 2.273300E-09 -7.755593E-08 2.775645E-08 A10 =
-3.010150E-09 -5.493100E-10 1.063630E-09 -1.411600E-10 A12 =
2.711000E-11 1.354000E-11 -8.770000E-12 4.600000E-13 A14 =
-1.400000E-13 -1.500000E-13 4.000000E-14 0.000000E+00 A16 =
0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 A18 =
0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 A20 =
0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00
[0130] In the second embodiment, the presentation of the aspheric
surface formula is similar to that in the first embodiment.
Besides, the definitions of parameters in following tables are
equal to those in the first embodiment, so the repetitious details
will not be given here.
[0131] The following contents may be deduced from Table 3 and Table
4.
TABLE-US-00005 Second embodiment (Primary reference wavelength =
555 nm) ETP1 ETP2 ETP1/TP1 ETP2/TP2 ED12 ED12/IN12 9.816 5.993
0.989 1.003 0.395 3.792 ETL EBL EIN EIR PIR EIN/ETL 37.000 20.796
16.204 20.796 21.000 0.438 BL EBL/BL SETP STP SETP/STP 21 0.9903
15.809 15.899 0.994 InRS11 InRS12 InRS21 InRS22 InRSO InRSI 1.1894
-5.9153 4.6559 9.4333 5.8453 15.3485 |InRS11|/ |InRS12|/ |InRS21|/
|InRS22|/ .SIGMA. |InRS| TP1 TP1 TP2 TP2 TP1/TP2 21.1938 0.1198
0.5960 0.7793 1.5790 1.6611 |f/f1| |f/f2| |f1/f2| IN12/f HOS/f HOI
0.6712 0.1937 0.2886 0.0036 1.2753 30.0000 HVT11 HVT12 HVT21 HVT22
HVT22/HOI HVT22/HOS 0.0000 0.0000 15.0245 0.0000 0.0000 0.0000 HOS
InTL HOS/HOI InS/HOS ODT % TDT % 37.0028 16.0028 1.2334 1.2567
-9.5741 8.0091
[0132] The following contents may be deduced from Table 3 and Table
4.
TABLE-US-00006 Related inflection point values of second embodiment
(Primary reference wavelength: 555 nm) HIF121 12.8088 HIF121/HOI
0.4270 SGI121 -5.1208 | SGI121 |/(| SGI121 | + TP1) 0.3404 HIF211
9.6803 HIF211/HOI 0.3227 SGI211 3.1410 | SGI211 |/(| SGI211 | +
TP2) 0.2404 HIF221 10.3659 HIF221/HOI 0.3455 SGI221 4.5571 | SGI221
|/(| SGI221 | + TP2) 0.3147
The Third Embodiment
Embodiment 3
[0133] Please refer to FIG. 3A, FIG. 3B, and FIG. 3C. FIG. 3A is a
schematic view of the optical image capturing system according to
the third embodiment of the present application, FIG. 3B is
longitudinal spherical aberration curves, astigmatic field curves,
and an optical distortion curve of the optical image capturing
system in the order from left to right according to the third
embodiment of the present application, and FIG. 3C is a
characteristic diagram of modulation transfer of a visible light
according to the third embodiment of the present application. As
shown in FIG. 3A, in order from an object side to an image side,
the optical image capturing system includes an aperture stop 300, a
first lens element 310, a second lens element 320, an image plane
380, and an image sensing device 390. The object-side surface of
the present embodiment, which is applied to the display designed
with Full-HD or WQHD resolution such as HD 1080p display, is served
as the purpose of the virtual reality. The imaging system of the
present embodiment is designed with the resolution of 10.6
pixel/degree or 5.6 arcmin/pixel.
[0134] The first lens element 310 has positive refractive power and
it is made of plastic material. The first lens element 310 has a
convex object-side surface 312 and a convex image-side surface 314,
and both of the object-side surface 312 and the image-side surface
314 are aspheric. The object-side surface 312 has an inflection
point and the image-side surface 314 has two inflection points.
[0135] The second lens element 320 has positive refractive power
and it is made of plastic material. The second lens element 320 has
a convex object-side surface 322 and a concave image-side surface
324, and both of the object-side surface 322 and the image-side
surface 324 are aspheric and have an inflection point.
[0136] In the optical image capturing system of the present
embodiment, contrast transfer rates of modulation transfer with
spatial frequencies of 10 cycles/mm of a visible light at the
optical axis on the image plane, 0.3 HOI and 0.7 HOI are
respectively denoted by MTFE0, MTFE3 and MTFE7. The following
relations are satisfied: MTFE0 is about 0.28, MTFE3 is about 0.03
and MTFE7 is about 0.02.
[0137] Please refer to the following Table 5 and Table 6.
The detailed data of the optical image capturing system of the
third embodiment is as shown in Table 5.
TABLE-US-00007 TABLE 5 Data of the optical image capturing system f
= 25.6515 mm; f/HEP = 2.7021; HAF(tan) = 49.950 deg Surface#
Curvature Radius Thickness Material Index Abbe # Focal length 0
Object Plano 250 1 Shading sheet Plano 0.500 2 Ape. Stop Plano
9.503 3 Lens 1 657.3110644 10.924 Plastic 1.491 57.21 47.3441 4
-24.044851 0.300 5 Lens 2 13.0574377 6.406 Plastic 1.585 29.90
67.1288 6 15.95830706 21.968 7 Plano 0.800 BK7_SCHOTT 1.517 64.13 8
Plano 0.000 9 Image plane Plano 0.000 Reference wavelength (d-line)
= 555 nm; shield position: The clear aperture of the first surface
is 5.0 mm. The clear aperture of the fourth surface is 15.50
mm.
As for the parameters of the aspheric surfaces of the third
embodiment, reference is made to Table 6.
TABLE-US-00008 TABLE 6 Aspheric Coefficients Surface # 3 4 5 6 k =
9.000000E+02 3.881472E-02 -2.137457E+00 -9.382222E-01 A4 =
7.805767E-05 8.948627E-05 1.423457E-04 4.019200E-04 A6 =
-5.479692E-06 -8.460420E-06 -3.438835E-06 -8.008123E-06 A8 =
1.871386E-07 1.762869E-07 3.221229E-08 7.784628E-08 A10 =
-3.010170E-09 -2.180880E-09 -1.273300E-10 -4.417100E-10 A12 =
2.711000E-11 1.949000E-11 0.000000E+00 1.540000E-12 A14 =
-1.500000E-13 -1.200000E-13 0.000000E+00 0.000000E+00 A16 =
0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 A18 =
0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 A20 =
0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00
[0138] The presentation of the aspheric surface formula in the
third embodiment is similar to that in the first embodiment.
Besides, the definitions of parameters in following tables are
equal to those in the first embodiment so the repetitious details
will not be given here.
[0139] The following contents may be deduced from Table 5 and Table
6.
TABLE-US-00009 Third embodiment (Primary reference wavelength: 555
nm) ETP1 ETP2 ETP1/TP1 ETP2/TP2 ED12 ED12/IN12 10.342 6.376 0.947
0.995 1.817 6.058 ETL EBL EIN EIR PIR EIN/ETL 40.366 21.831 18.536
21.031 21.968 0.459 BL EBL/BL SETP STP SETP/STP 22.7676 0.9589
16.718 17.331 0.965 InRS11 InRS12 InRS21 InRS22 InRSO InRSI 1.1615
-6.5629 7.8489 10.8012 9.0103 17.3641 |InRS11|/ |InRS12|/ |InRS21|/
|InRS22|/ .SIGMA. |InRS| TP1 TP1 TP2 TP2 TP1/TP2 26.3744 0.1063
0.6008 1.2252 1.6860 1.7052 |f/f1| |f/f2| |f1/f2| IN12/f HOS/f HOI
0.5418 0.3821 0.7053 0.0117 1.5749 28.9800 HVT11 HVT12 HVT21 HVT22
HVT22/HOI HVT22/HOS 0.0000 0.0000 18.1122 22.0342 0.7603 0.5454 HOS
InTL HOS/HOI InS/HOS ODT % TDT % 40.3982 17.6306 1.3940 1.2352
-11.7974 12.0765
[0140] The following contents may be deduced from Table 5 and Table
6.
TABLE-US-00010 Related inflection point values of third embodiment
(Primary reference wavelength: 555 nm) HIF111 12.2789 HIF111/HOI
0.4237 SGI111 0.8668 | SGI111 |/(| SGI111 | + TP1) 0.0735 HIF121
9.7443 HIF121/HOI 0.3362 SGI121 -2.6222 | SGI121 |/(| SGI121 | +
TP1) 0.1936 HIF122 10.8049 HIF122/HOI 0.3728 SGI122 -3.2072 |
SGI122 |/(| SGI122 | + TP1) 0.2270 HIF211 13.9313 HIF211/HOI 0.4807
SGI211 6.0323 | SGI211 |/(| SGI211 | + TP2) 0.3558 HIF221 13.6413
HIF221/HOI 0.4707 SGI221 6.6306 | SGI221 |/(| SGI221 | + TP2)
0.3777
The Fourth Embodiment
Embodiment 4
[0141] Please refer to FIG. 4A, FIG. 4B, and FIG. 4C. FIG. 4A is a
schematic view of the optical image capturing system according to
the fourth embodiment of the present application, FIG. 4B is
longitudinal spherical aberration curves, astigmatic field curves,
and an optical distortion curve of the optical image capturing
system in the order from left to right according to the fourth
embodiment of the present application, and FIG. 4C is a
characteristic diagram of modulation transfer of a visible light
according to the fourth embodiment of the present application. As
shown in FIG. 4A, in order from an object side to an image side,
the optical image capturing system includes an aperture stop 400, a
first lens element 410, a second lens element 420, an image plane
480, and an image sensing device 490. The object-side surface of
the present embodiment, which is applied to the display designed
with Full-HD or WQHD resolution such as HD 1080p display, is served
as the purpose of the virtual reality. The imaging system of the
present embodiment is designed with the resolution of 10.6
pixel/degree or 5.6 arcmin/pixel.
[0142] The first lens element 410 has positive refractive power and
it is made of plastic material. The first lens element 410 has a
convex object-side surface 412 and a convex image-side surface 414,
and both of the object-side surface 412 and the image-side surface
414 are aspheric. The image-side surface 414 has three inflection
points.
[0143] The second lens element 420 has positive refractive power
and it is made of plastic material. The second lens element 420 has
a convex object-side surface 422 and a concave image-side surface
424, and both of the object-side surface 422 and the image-side
surface 424 are aspheric and have an inflection point.
[0144] In the optical image capturing system of the present
embodiment, contrast transfer rates of modulation transfer with
spatial frequencies of 10 cycles/mm of a visible light at the
optical axis on the image plane, 0.3 HOI and 0.7 HOI are
respectively denoted by MTFE0, MTFE3 and MTFE7. The following
relations are satisfied: MTFE0 is about 0.74, MTFE3 is about 0.15
and MTFE7 is about 0.05.
[0145] Please refer to the following Table 7 and Table 8.
The detailed data of the optical image capturing system of the
fourth embodiment is as shown in Table 7.
TABLE-US-00011 TABLE 7 Data of the optical image capturing system f
= 32.8882 mm; f/HEP = 8.0215; HAF(tan) = 45.0111 deg Surface#
Curvature Radius Thickness Material Index Abbe # Focal length 0
Object Plano At infinity 1 Ape. Stop Plano 10.050 2 Lens 1
457.5384828 9.331 Plastic 1.491 57.21 53.3138 3 -27.67159296 0.315
4 Lens 2 9.966874496 5.351 Plastic 1.585 29.90 129.929 5
9.181169376 23.801 6 Plano 0.000 BK7_SCHOTT 1.517 64.13 7 Plano
0.000 8 Image plane Plano Reference wavelength (d-line) = 555 nm;
shield position: The clear aperture of the third surface is 14.438
mm.
As for the parameters of the aspheric surfaces of the fourth
embodiment, reference is made to Table 8.
TABLE-US-00012 TABLE 8 Aspheric Coefficients Surface # 2 3 4 5 k =
9.000000E+02 -9.473691E-01 -1.936474E+00 -1.722886E+00 A4 =
7.935230E-05 4.698844E-05 1.774855E-04 3.009292E-04 A6 =
-4.291540E-06 -4.392534E-06 -4.457656E-06 -7.870102E-06 A8 =
1.327677E-07 9.066300E-09 1.857921E-08 8.923823E-08 A10 =
-1.940420E-09 1.027320E-09 3.365500E-10 -5.690500E-10 A12 =
1.585000E-11 -1.419000E-11 -4.950000E-12 2.200000E-12 A14 =
-8.000000E-14 9.000000E-14 3.000000E-14 -1.000000E-14 A16 =
0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 A18 =
0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 A20 =
0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00
[0146] The presentation of the aspheric surface formula in the
fourth embodiment is similar to that in the first embodiment.
Besides the definitions of parameters in following tables are equal
to those in the first embodiment so the repetitious details will
not be given here.
[0147] The following contents may be deduced from Table 7 and Table
8.
TABLE-US-00013 Fourth embodiment (Primary reference wavelength: 555
nm) ETP1 ETP2 ETP1/TP1 ETP2/TP2 ED12 ED12/IN12 9.250 5.371 0.991
1.004 0.602 1.911 ETL EBL EIN EIR PIR EIN/ETL 38.792 23.569 15.223
23.569 23.801 0.392 BL EBL/BL SETP STP SETP/STP 23.8005 0.9903
14.621 14.682 0.996 InRS11 InRS12 InRS21 InRS22 InRSO InRSI 1.7896
-4.4034 6.7315 10.7995 8.5211 15.2029 |InRS11|/ |InRS12|/ |InRS21|/
|InRS22|/ .SIGMA. |InRS| TP1 TP1 TP2 TP2 TP1/TP2 23.7239 0.1918
0.4719 1.2580 2.0183 1.7439 |f/f1| |f/f2| |f1/f2| IN12/f HOS/f HOI
0.6169 0.2531 0.4103 0.0096 1.1797 30.6000 HVT11 HVT12 HVT21 HVT22
HVT22/HOI HVT22/HOS 0.0000 0.0000 16.0895 0.0000 0.0000 0.0000 HOS
InTL HOS/HOI InS/HOS ODT % TDT % 38.7975 14.9970 1.2679 1.2590
-6.6595 2.5701
[0148] The following contents may be deduced from Table 7 and Table
8.
TABLE-US-00014 Related inflection point values of second embodiment
(Primary reference wavelength: 555 nm) HIF121 8.9027 HIF121/HOI
0.2909 SGI121 -1.9636 | SGI121 |/(| SGI121 | + TP1) 0.1738 HIF122
10.8875 HIF122/HOI 0.3558 SGI122 -2.8967 | SGI122 |/(| SGI122 | +
TP1) 0.2369 HIF123 12.6370 HIF123/HOI 0.4130 SGI123 -3.7238 |
SGI123 |/(| SGI123 | + TP1) 0.2852 HIF211 12.3836 HIF211/HOI 0.4047
SGI211 5.3802 | SGI211 |/(| SGI211 | + TP2) 0.3657 HIF221 12.3406
HIF221/HOI 0.4033 SGI221 6.5366 | SGI221 |/(| SGI221 | + TP2)
0.4119
The Fifth Embodiment
Embodiment 5
[0149] Please refer to FIG. 5A, FIG. 5B, and FIG. 5C. FIG. 5A is a
schematic view of the optical image capturing system according to
the fifths embodiment of the present application, FIG. 5B is
longitudinal spherical aberration curves, astigmatic field curves,
and an optical distortion curve of the optical image capturing
system in the order from left to right according to the fifth
embodiment of the present application, and FIG. 5C is a
characteristic diagram of modulation transfer of a visible light
according to the fifth embodiment of the present application. As
shown in FIG. 5A, in order from an object side to an image side,
the optical image capturing system includes an aperture stop 500, a
first lens element 510, a second lens element 520, an image plane
580, and an Image sensing device 590. The object-side surface of
the present embodiment, which is applied to the display designed
with Full-HD or WQHD resolution such as HD 1080p display, is served
as the purpose of the virtual reality. The imaging system of the
present embodiment is designed with the resolution of 10.6
pixel/degree or 5.6 arcmin/pixel.
[0150] The first lens element 510 has positive refractive power and
it is made of plastic material. The first lens element 510 has a
convex object-side surface 512 and a convex image-side surface 514,
and both of the object-side surface 512 and the image-side surface
514 are aspheric. The image-side surface 514 has three inflection
points.
[0151] The second lens element 520 has positive refractive power
and it is made of plastic material. The second lens element 520 has
a convex object-side surface 522 and a concave image-side surface
524, and both of the object-side surface 522 and the image-side
surface 524 are aspheric and have an inflection point.
[0152] In the optical image capturing system of the present
embodiment, contrast transfer rates of modulation transfer with
spatial frequencies of 10 cycles/mm of a visible light at the
optical axis on the image plane, 0.3 HOI and 0.7 HOI are
respectively denoted by MTFE0, MTFE3 and MTFE7. The following
relations are satisfied: MTFE0 is about 0.77, MTFE3 is about 0.28
and MTFE7 is about 0.13.
[0153] Please refer to the following Table 9 and Table 10.
The detailed data of the optical image capturing system of the
fifth embodiment is as shown in Table 9.
TABLE-US-00015 TABLE 9 Data of the optical image capturing system f
= 28.74091 mm; f/HEP = 7.1852; HAF(tan) = 49.9865 deg Surface#
Curvature Radius Thickness Material Index Abbe # Focal length 0
Object Plano At infinity 1 Ape. Stop Plano 8.627 2 Lens 1
414.8192733 9.831 Plastic 1.491 57.21 45.3591 3 -23.42912844 0.184
4 Lens 2 9.706200278 4.407 Plastic 1.585 29.90 110.341 5
9.492285042 21.952 6 Plano 0.000 BK7_SCHOTT 1.517 64.13 7 Plano
0.000 8 Image plane Plano 8.627 Reference wavelength (d-line) = 555
nm; shield position: The clear aperture of the second surface is
13.40 mm.
As for the parameters of the aspheric surfaces of the fifth
embodiment, reference is made to Table 10.
TABLE-US-00016 TABLE 10 Aspheric Coefficients Surface # 2 3 4 5 k =
9.000000E+02 -1.589647E+00 -2.104855E+00 -1.452936E+00 A4 =
9.565924E-05 -9.479683E-05 -5.710812E-05 2.751574E-05 A6 =
-5.482868E-06 -6.562360E-06 5.008519E-07 -2.634984E-07 A8 =
1.868123E-07 2.320071E-07 3.227850E-09 1.099000E-11 A10 =
-3.010060E-09 -4.029440E-09 -8.814000E-11 1.700000E-12 A12 =
2.711000E-11 4.393000E-11 6.700000E-13 0.000000E+00 A14 =
-1.400000E-13 -3.000000E-13 0.000000E+00 0.000000E+00 A16 =
0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 A18 = A20 =
[0154] The presentation of the aspheric surface formula in the
fifth embodiment is similar to that in the first embodiment.
Besides the definitions of parameters in following tables are equal
to those in the first embodiment so the repetitious details will
not be given here.
[0155] The following contents may be deduced from Table 9 and Table
10.
TABLE-US-00017 Fifth embodiment (Primary reference wavelength: 555
nm) ETP1 ETP2 ETP1/TP1 ETP2/TP2 ED12 ED12/IN12 9.737 4.414 0.991
1.002 0.473 2.580 ETL EBL EIN EIR PIR EIN/ETL 36.367 21.742 14.625
21.742 21.952 0.402 BL EBL/BL SETP STP SETP/STP 21.9520 0.9904
14.152 14.238 0.994 InRS11 InRS12 InRS21 InRS22 InRSO InRSI 2.0261
-4.5526 6.1013 9.8378 8.1274 14.3904 |InRS11|/ |InRS12|/ |InRS21|/
|InRS22|/ .SIGMA. |InRS| TP1 TP1 TP2 TP2 TP1/TP2 22.5178 0.2061
0.4631 1.3845 2.2324 2.2308 |f/f1| |f/f2| |f1/f2| IN12/f HOS/f HOI
0.6336 0.2605 0.4111 0.0064 1.2656 30.6000 HVT11 HVT12 HVT21 HVT22
HVT22/HOI HVT22/HOS 0.0000 13.6491 15.5498 19.8996 0.6503 0.5471
HOS InTL HOS/HOI InS/HOS ODT % TDT % 36.3731 14.4211 1.1887 1.2372
-10.7970 8.7110
[0156] The following contents may be deduced from Table 9 and Table
10.
TABLE-US-00018 Related inflection point values of fifth embodiment
(Primary reference wavelength: 555 nm) HIF121 8.9488 HIF121/HOI
0.2924 SGI121 -2.3949 | SGI121 |/(| SGI121 | + TP1) 0.1959 HIF122
11.2071 HIF122/HOI 0.3662 SGI122 -3.5646 | SGI122 |/(| SGI122 | +
TP1) 0.2661 HIF123 12.0279 HIF123/HOI 0.3931 SGI123 -3.9714 |
SGI123 |/(| SGI123 | + TP1) 0.2877 HIF211 10.9565 HIF211/HOI 0.3581
SGI211 4.6289 | SGI211 |/(| SGI211 | + TP2) 0.3201 HIF221 10.9510
HIF221/HOI 0.3579 SGI221 5.5510 | SGI221 |/(| SGI221 | + TP2)
0.3609
The Sixth Embodiment
Embodiment 6
[0157] Please refer to FIG. 6A, FIG. 6B, and FIG. 6C. FIG. 6A is a
schematic view of the optical image capturing system according to
the sixth Embodiment of the present application, FIG. 6B is
longitudinal spherical aberration curves, astigmatic field curves,
and an optical distortion curve of the optical image capturing
system in the order from left to right according to the sixth
Embodiment of the present application, and FIG. 6C is a
characteristic diagram of modulation transfer of a visible light
according to the sixth embodiment of the present application. As
shown in FIG. 6A, in order from an object side to an image side,
the optical image capturing system includes an aperture stop 600, a
first lens element 610, a second lens element 620, an image plane
680, and an image sensing device 690. The object-side surface of
the present embodiment, which is applied to the display designed
with Full-HD or WQHD resolution such as HD 1080p display, is served
as the purpose of the virtual reality. The imaging system of the
present embodiment is designed with the resolution of 10.6
pixel/degree or 5.6 arcmin/pixel.
[0158] The first lens element 610 has positive refractive power and
it is made of plastic material. The first lens element 610 has a
convex object-side surface 612 and a convex image-side surface 614,
and both of the object-side surface 612 and the image-side surface
614 are aspheric. The image-side surface 614 has two inflection
points. Wherein the image-side surface 614 is a Fresnel lens
consisted of 30 Discrete Zones.
[0159] The second lens element 620 has positive refractive power
and it is made of plastic material. The second lens element 620 has
a convex object-side surface 622 and a concave image-side surface
624, and both of the object-side surface 622 and the image-side
surface 624 are aspheric and have an inflection point.
[0160] In the optical image capturing system of the present
embodiment, contrast transfer rates of modulation transfer with
spatial frequencies of 10 cycles/mm of a visible light at the
optical axis on the image plane, 0.3 HOI and 0.7 HOI are
respectively denoted by MTFE0, MTFE3 and MTFE7. The following
relations are satisfied: MTFE0 is about 0.84, MTFE3 is about 0.03
and MTFE7 is about 0.13.
[0161] Please refer to the following Table 11 and Table 12.
The detailed data of the optical image capturing system of the
sixth Embodiment is as shown in Table 11.
TABLE-US-00019 TABLE 11 Data of the optical image capturing system
f = 32.3062 mm; f/HEP = 7.6920; HAF = 49.96 deg Surface# Curvature
Radius Thickness Material Index Abbe # Focal length 0 Object Plano
At infinity 1 Shading sheet Plano 0.500 2 Ape. Stop Plano 9.470 3
Lens 1 423.4078639 9.347 Plastic 1.491 57.21 42.5093 4 -21.86708632
0.409 5 Lens 2 15.7648588 6.703 Plastic 1.585 29.90 285.482 6
14.65671267 23.369 7 Plano 0.000 8 Image plane Plano 0.000
Reference wavelength (d-line) = 555 nm; shield position: The clear
aperture of the first surface is 2.10 mm. The clear aperture of the
third surface is 12.740 mm. The clear aperture of the fourth
surface is 14.540 mm.
As for the parameters of the aspheric surfaces of the sixth
Embodiment, reference is made to Table 12.
TABLE-US-00020 TABLE 12 Aspheric Coefficients Surface # 3 4 5 6 k =
9.000000E+02 -7.106888E-02 -2.291902E+00 -1.656089E+00 A4 =
8.040855E-05 -1.596282E-04 -1.049952E-04 7.257268E-05 A6 =
-5.500679E-06 1.279398E-06 2.107174E-06 -1.343912E-06 A8 =
1.868574E-07 2.331230E-09 -5.390666E-08 1.536536E-08 A10 =
-3.009760E-09 -5.494800E-10 9.339600E-10 -1.244000E-10 A12 =
2.711000E-11 1.354000E-11 -9.390000E-12 6.300000E-13 A14 =
-1.400000E-13 -1.500000E-13 6.000000E-14 0.000000E+00 A16 =
0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 A18 =
0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00 A20 =
0.000000E+00 0.000000E+00 0.000000E+00 0.000000E+00
[0162] In the sixth Embodiment, the presentation of the aspheric
surface formula is similar to that in the first embodiment.
Besides, the definitions of parameters in following tables are
equal to those in the first embodiment, so the repetitious details
will not be given here.
[0163] The following contents may be deduced from Table 11 and
Table 12.
TABLE-US-00021 Sixth embodiment (Primary reference wavelength: 555
nm) ETP1 ETP2 ETP1/TP1 ETP2/TP2 ED12 ED12/IN12 9.237 6.717 0.988
1.002 0.650 1.590 ETL EBL EIN EIR PIR EIN/ETL 39.822 23.218 16.604
23.218 23.369 0.417 BL EBL/BL SETP STP SETP/STP 23.3690 0.9935
15.954 16.050 0.994 InRS11 InRS12 InRS21 InRS22 InRSO InRSI 0.8445
-4.8195 3.8953 6.6968 4.7398 11.5163 |InRS11|/ |InRS12|/ |InRS21|/
|InRS22|/ .SIGMA. |InRS| TP1 TP1 TP2 TP2 TP1/TP2 16.2561 0.0903
0.5156 0.5811 0.9991 1.3945 |f/f1| |f/f2| |f1/f2| IN12/f HOS/f HOI
0.7600 0.1132 0.1489 0.0127 1.2328 30.6000 HVT11 HVT12 HVT21 HVT22
HVT22/HOI HVT22/HOS 0.0000 0.0000 14.5520 0.0000 0.0000 0.0000 HOS
InTL HOS/HOI InS/HOS ODT % TDT % 39.8281 16.4591 1.3016 1.2378
-6.8473 5.7012
[0164] The following contents may be deduced from Table 11 and
Table 12.
TABLE-US-00022 Related inflection point values of sixth embodiment
(Primary reference wavelength: 555 nm) HIF121 9.1907 HIF121/HOI
0.3003 SGI121 -2.5494 | SGI121 |/(| SGI121 | + TP1) 0.2143 HIF122
10.3252 HIF122/HOI 0.3374 SGI122 -3.1710 | SGI122 |/(| SGI122 | +
TP1) 0.2533 HIF211 10.8872 HIF211/HOI 0.3558 SGI211 2.7901 | SGI211
|/(| SGI211 | + TP2) 0.2299 HIF221 11.0916 HIF221/HOI 0.3625 SGI221
3.9875 | SGI221 |/(| SGI221 | + TP2) 0.2990
[0165] The above-mentioned descriptions represent merely the
exemplary embodiment of the present disclosure, without any
intention to limit the scope of the present disclosure thereto.
Various equivalent changes, alternations or modifications based on
the claims of present disclosure are all consequently viewed as
being embraced by the scope of the present disclosure.
* * * * *