U.S. patent application number 13/236886 was filed with the patent office on 2012-12-13 for image capturing optical lens system.
This patent application is currently assigned to LARGAN PRECISION CO., LTD.. Invention is credited to Ming-Ta Chou, Hsiang-Chi Tang, Tsung-Han Tsai.
Application Number | 20120314302 13/236886 |
Document ID | / |
Family ID | 46016349 |
Filed Date | 2012-12-13 |
United States Patent
Application |
20120314302 |
Kind Code |
A1 |
Tang; Hsiang-Chi ; et
al. |
December 13, 2012 |
IMAGE CAPTURING OPTICAL LENS SYSTEM
Abstract
This invention provides an optical lens system comprising: a
first lens element with positive refractive power; a second lens
element with negative refractive power; a third lens element with
negative refractive power having a concave object-side surface and
at least one of the object-side surface and the image-side surface
thereof being aspheric; a plastic fourth lens element having at
least one of the object-side surface and the image-side surface
thereof being aspheric; a plastic fifth lens element having a
concave image-side surface, at least one of the object-side surface
and the image-side surface thereof being aspheric, and at least one
inflection point is formed on at least one of the object-side
surface and the image-side surface thereof. By such arrangement,
photosensitivity and total track length of the system can be
reduced, and the aberration and astigmatism of the system can be
effectively corrected. Moreover, high image resolution can be
obtained.
Inventors: |
Tang; Hsiang-Chi; (Taichung,
TW) ; Chou; Ming-Ta; (Taichung, TW) ; Tsai;
Tsung-Han; (Taichung, TW) |
Assignee: |
LARGAN PRECISION CO., LTD.
Taichung
TW
|
Family ID: |
46016349 |
Appl. No.: |
13/236886 |
Filed: |
September 20, 2011 |
Current U.S.
Class: |
359/714 |
Current CPC
Class: |
G02B 13/0045 20130101;
G02B 13/22 20130101 |
Class at
Publication: |
359/714 |
International
Class: |
G02B 13/18 20060101
G02B013/18 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 9, 2011 |
TW |
100120114 |
Claims
1. An image capturing optical lens system, in order from an object
side to an image side comprising five lens elements with refractive
power: a first lens element with positive refractive power; a
second lens element with negative refractive power; a third lens
element with negative refractive power having a concave object-side
surface and at least one of the object-side surface and the
image-side surface thereof being aspheric; a fourth lens element
having at least one of the object-side surface and the image-side
surface thereof being aspheric and made of plastic; and a fifth
lens element having a concave image-side surface, at least one of
the object-side surface and the image-side surface thereof being
aspheric, at least one inflection point is formed on at least one
of the object-side surface and the image-side surface thereof and
made of plastic; wherein 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, a curvature
radius of the object-side surface of the third lens element is R5,
a curvature radius of the image-side surface of the third lens
element is R6, a curvature radius of the object-side surface of the
fourth lens element is R7, a curvature radius of the image-side
surface of the fourth lens element is R8, an axial distance between
the third lens element and the fourth lens element is T34, an axial
distance between the fourth lens element and the fifth lens element
is T45, an axial distance between the second lens element and the
third lens element is T23, and they satisfy the following
relations: -5.0<(R3+R4)/(R3-R4)<-0.75;
-5.0<(R5+R6)/(R5-R6)<-0.8; -5.3<R7/R8<6.5; and
0.1<(T34+T45)/T23<1.8.
2. The image capturing optical lens system according to claim 1,
wherein the fourth lens element has positive refractive power, and
the fifth lens element has negative refractive power.
3. The image capturing optical lens system according to claim 2,
wherein a focal length of the fourth lens element is f4, a focal
length of the fifth lens element is f5, and they satisfy the
following relation: -1.3<f4/f5<-0.7.
4. The image capturing optical lens system according to claim 3,
wherein an Abbe number of the first lens element is V1, an Abbe
number of the second lens element is V2, and they satisfy the
following relation: 28<V1-V2<45.
5. The image capturing optical lens system according to claim 4,
wherein an Abbe number of the first lens element is V1, an Abbe
number of the third lens element is V3, and they satisfy the
following relation: 28<V1-V3<45.
6. The image capturing optical lens system according to claim 3,
wherein the curvature radius of the object-side surface of the
third lens element is R5, the curvature radius of the image-side
surface of the third lens element is R6, and they satisfy the
following relation: -2.5<(R5+R6)/(R5-R6)<-1.05.
7. The image capturing optical lens system according to claim 2,
wherein the second lens element has a concave object-side surface
and a convex image-side surface, the curvature radius of the
object-side surface of the second lens element is R3, the curvature
radius of the image-side surface of the second lens element is R4,
and they satisfy the following relation:
-2.5<(R3+R4)/(R3-R4)<-1.05.
8. The image capturing optical lens system according to claim 7,
wherein the curvature radius of the image-side surface of the
fourth lens element is R8, a focal length of the image capturing
optical lens system is f, and they satisfy the following relation:
-0.5<R8/f<0.
9. The image capturing optical lens system according to claim 7,
wherein a focal length of the image capturing optical lens system
is f, a focal length of the third lens element is f3, and they
satisfy the following relation: -1.3<f/f3<-0.2.
10. The image capturing optical lens system according to claim 3,
further comprises a stop, an axial distance between the stop and an
image plane is SL, an axial distance between the object-side
surface of the first lens element and the image plane is TTL, and
they satisfy the following relation: 0.70<SL/TTL<0.93.
11. The image capturing optical lens system according to claim 10,
wherein a central thickness of the second lens element is CT2, a
central thickness of the third lens element is CT3, and they
satisfy the following relation: 0.3<CT2/CT3<1.05.
12. The image capturing optical lens system according to claim 10,
wherein a focal length of the image capturing optical lens system
is f, a focal length of the third lens element is f3, and they
satisfy the following relation: -1.0<f/f3<-0.3.
13. The image capturing optical lens system according to claim 10,
wherein a curvature radius of the object-side surface of the fifth
lens element is R9, a focal length of the image capturing optical
lens system is f, and they satisfy the following relation:
1.0<R9/f<0.
14. The image capturing optical lens system according to claim 1,
further comprises an image sensor provided on an image plane, an
axial distance between the object-side surface of the first lens
element and the image plane is TTL, half of a diagonal length of an
effective photosensitive area of the image sensor is ImgH, and they
satisfy the following relation: TTL/ImgH<2.0.
15. An image capturing optical lens system, in order from an object
side to an image side comprising five lens elements with refractive
power: a first lens element with positive refractive power; a
second lens element with negative refractive power; a third lens
element with negative refractive power having a concave object-side
surface and at least one of the object-side surface and the
image-side surface thereof being aspheric; a fourth lens element
with positive refractive power having at least one of the
object-side surface and the image-side surface thereof being
aspheric and made of plastic; and a fifth lens element with
negative refractive power having a concave image-side surface, at
least one of the object-side surface and the image-side surface
thereof being aspheric, at least one inflection point is formed on
at least one of the object-side surface and the image-side surface
thereof and made of plastic; wherein 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,
a curvature radius of the object-side surface of the third lens
element is R5, a curvature radius of the image-side surface of the
third lens element is R6, the image capturing optical lens system
further comprises a stop, an axial distance between the stop and an
image plane is SL, an axial distance between the object-side
surface of the first lens element and the image plane is TTL, and
they satisfy the following relations:
-5.0<(R3+R4)/(R3-R4)<-0.75; -5.0<(R5+R6)/(R5-R6)<-0.8;
and 0.70<SL/TTL<0.93.
16. The image capturing optical lens system according to claim 15,
wherein the second lens element has a concave object-side surface
and a convex image-side surface, the curvature radius of the
object-side surface of the second lens element is R3, the curvature
radius of the image-side surface of the second lens element is R4,
and they satisfy the following relation:
-2.5<(R3+R4)/(R3-R4)<-1.05.
17. The image capturing optical lens system according to claim 15,
wherein the curvature radius of the object-side surface of the
third lens element is R5, the curvature radius of the image-side
surface of the third lens element is R6, and they satisfy the
following relation: -2.5<(R5+R6)/(R5-R6)<-1.05.
18. The image capturing optical lens system according to claim 15,
wherein a focal length of the image capturing optical lens system
is f, a focal length of the third lens element is f3, and they
satisfy the following relation: -1.0<f/f3<-0.3.
19. The image capturing optical lens system according to claim 15,
wherein an Abbe number of the first lens element is V1, an Abbe
number of the second lens element is V2, an Abbe number of the
third lens element is V3, and they satisfy the following relations:
28<V1-V2<45; and 28<V1-V3<45.
20. The image capturing optical lens system according to claim 15,
wherein a central thickness of the second lens element is CT2, a
central thickness of the third lens element is CT3, and they
satisfy the following relation: 0.3<CT2/CT3<1.05.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This non-provisional application claims priority under 35
U.S.C. .sctn.119(a) on Patent Application No. 100120114 filed in
Taiwan, R.O.C. on Jun. 9, 2011, the entire contents of which are
hereby incorporated by reference.
BACKGROUND OF THE INVENTION
[0002] 1. Field of the Invention
[0003] The present invention relates to an image capturing optical
lens system, and more particularly, to a compact image capturing
optical lens system used in electronic products.
[0004] 2. Description of the Prior Art
[0005] In recent years, with the popularity of portable electronic
products having photographing function, the demand of compact
imaging lens system has grown. Generally, the sensor of a general
photographing camera is none other than CCD (Charge Coupled Device)
or CMOS device (Complementary Metal Oxide Semiconductor device).
Furthermore, advances in semiconductor manufacturing technology
have allowed the pixel size of sensors to be reduced and therefore
lead compact imaging lens systems to higher resolution. In the
meantime, the demand for better image quality is also
increased.
[0006] A conventional image capturing lens system equipped on a
portable electronic product is in various design of two-lens
element, three-lens element, four-lens element or five-lens
element, such as the one set forth in U.S. Pat. No. 7,365,920.
However, with the popularity of high level portable electronic
products, such as smart phone and PDA (Personal Digital Assistant),
the demand for the pixel size and image quality of compact imaging
lens system increase fast, and the conventional lens system with
four lens elements can no longer satisfy the imaging lens systems
of even higher level. Moreover, a conventional image capturing lens
system having five lens elements usually adopts different
assemblies of positive or negative refractive power or has a
cemented doublet lens element. This kind of five-lens element lens
system frequently has the drawback of excessively long total track
length so that is not suitable for compact electronic products
[0007] Inasmuch as the foregoing, a need is continuously existed
for a lens system with good image quality and moderate total track
length and is suitable for compact and portable electronic
products.
SUMMARY OF THE INVENTION
[0008] The present invention provides an image capturing optical
lens system, in order from an object side to an image side
comprising five lens elements with refractive power: a first lens
element with positive refractive power; a second lens element with
negative refractive power; a third lens element with negative
refractive power having a concave object-side surface and at least
one of the object-side surface and the image-side surface thereof
being aspheric; a fourth lens element having at least one of the
object-side surface and the image-side surface thereof being
aspheric and made of plastic; and a fifth lens element having a
concave image-side surface, at least one of the object-side surface
and the image-side surface thereof being aspheric, at least one
inflection point is formed on at least one of the object-side
surface and the image-side surface thereof and made of plastic;
wherein 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, a curvature radius of the
object-side surface of the third lens element is R5, a curvature
radius of the image-side surface of the third lens element is R6, a
curvature radius of the object-side surface of the fourth lens
element is R7, a curvature radius of the image-side surface of the
fourth lens element is R8, an axial distance between the third lens
element and the fourth lens element is T34, an axial distance
between the fourth lens element and the fifth lens element is T45,
an axial distance between the second lens element and the third
lens element is T23, and they satisfy the following relations:
-5.0<(R3+R4)/(R3-R4)<-0.75; -5.0<(R5+R6)/(R5-R6)<-0.8;
-5.3<R7/R8<6.5; and 0.1<(T34+T45)/T23<1.8.
[0009] On the other hand, the present invention provides an image
capturing optical lens system, in order from an object side to an
image side comprising five lens elements with refractive power: a
first lens element with positive refractive power; a second lens
element with negative refractive power; a third lens element with
negative refractive power having a concave object-side surface and
at least one of the object-side surface and the image-side surface
thereof being aspheric; a fourth lens element with positive
refractive power having at least one of the object-side surface and
the image-side surface thereof being aspheric and made of plastic;
and a fifth lens element with negative refractive power having a
concave image-side surface, at least one of the object-side surface
and the image-side surface thereof being aspheric, at least one
inflection point is formed on at least one of the object-side
surface and the image-side surface thereof and made of plastic;
wherein 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, a curvature radius of the
object-side surface of the third lens element is R5, a curvature
radius of the image-side surface of the third lens element is R6,
the image capturing optical lens system further comprises a stop,
an axial distance between the stop and an image plane is SL, an
axial distance between the object-side surface of the first lens
element and the image plane is TTL, and they satisfy the following
relations: -5.0<(R3+R4)/(R3-R4)<-0.75;
-5.0<(R5+R6)/(R5-R6)<-0.8; and 0.70<SL/TTL<0.93.
[0010] By such arrangement, photosensitivity and total track length
of the system can be reduced, and the aberration and astigmatism of
the system can be effectively corrected. Moreover, high image
resolution can be obtained.
[0011] In the aforementioned image capturing optical lens system,
the first lens element has positive refractive power and thereby
can provide significant positive refractive power needed for the
system and is favorable for reducing the total track length
thereof. When the second lens element has negative refractive
power, the aberration provided by the first lens element can be
effectively corrected. Also, the chromatic aberration can be
favorably corrected. When the third lens element has negative
refractive power, the third lens element can correct the aberration
and chromatic aberration and reduce the sensitivity of the system
along with the second lens element. When the fourth lens element
has positive refractive power and the fifth lens element has
negative refractive power, a positive-negative telephoto structure
is formed so that the back focal length of the system is favorably
reduced as well as the total track length of the system.
[0012] In the aforementioned image capturing optical lens system,
the second lens element has a concave object-side surface and a
convex image-side surface so that the astigmatism of the system can
be favorably corrected. When the third lens element has a concave
object-side surface, the astigmatism of the system can be favorably
corrected. When the fifth lens element has concave image-side
surface, the principal point of the system can be positioned away
from the image plane so that the total track length thereof can be
shortened for keeping the system compact. In addition, when at
least one inflection is formed on at least one of the object-side
and image-side surfaces of the fifth lens element, the angle at
which light projects onto the image sensor from the off-axis field
can be effectively reduced so that the sensing efficiency of the
image sensor can be improved and the off-axis aberration can be
corrected.
BRIEF DESCRIPTION OF THE DRAWINGS
[0013] FIG. 1A shows an image capturing optical lens system in
accordance with a first embodiment of the present invention.
[0014] FIG. 1B shows the aberration curves of the first embodiment
of the present invention.
[0015] FIG. 2A shows an image capturing optical lens system in
accordance with a second embodiment of the present invention.
[0016] FIG. 2B shows the aberration curves of the second embodiment
of the present invention.
[0017] FIG. 3A shows an image capturing optical lens system in
accordance with a third embodiment of the present invention.
[0018] FIG. 3B shows the aberration curves of the third embodiment
of the present invention.
[0019] FIG. 4A shows an image capturing optical lens system in
accordance with a fourth embodiment of the present invention.
[0020] FIG. 4B shows the aberration curves of the fourth embodiment
of the present invention.
[0021] FIG. 5A shows an image capturing optical lens system in
accordance with a fifth embodiment of the present invention.
[0022] FIG. 5B shows the aberration curves of the fifth embodiment
of the present invention.
[0023] FIG. 6A shows an image capturing optical lens system in
accordance with a sixth embodiment of the present invention.
[0024] FIG. 6B shows the aberration curves of the sixth embodiment
of the present invention.
[0025] FIG. 7A shows an image capturing optical lens system in
accordance with a seventh embodiment of the present invention.
[0026] FIG. 7B shows the aberration curves of the seventh
embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0027] The present invention provides an image capturing optical
lens system, in order from an object side to an image side
comprising five lens elements with refractive power: a first lens
element with positive refractive power; a second lens element with
negative refractive power; a third lens element with negative
refractive power having a concave object-side surface and at least
one of the object-side surface and the image-side surface thereof
being aspheric; a fourth lens element having at least one of the
object-side surface and the image-side surface thereof being
aspheric and made of plastic; and a fifth lens element having a
concave image-side surface, at least one of the object-side surface
and the image-side surface thereof being aspheric, at least one
inflection point is formed on at least one of the object-side
surface and the image-side surface thereof and made of plastic;
wherein 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, a curvature radius of the
object-side surface of the third lens element is R5, a curvature
radius of the image-side surface of the third lens element is R6, a
curvature radius of the object-side surface of the fourth lens
element is R7, a curvature radius of the image-side surface of the
fourth lens element is R8, an axial distance between the third lens
element and the fourth lens element is T34, an axial distance
between the fourth lens element and the fifth lens element is T45,
an axial distance between the second lens element and the third
lens element is T23, and they satisfy the following relations:
-5.0<(R3+R4)/(R3-R4)<-0.75; -5.0<(R5+R6)/(R5-R6)<-0.8;
-5.3<R7/R8<6.5; and 0.1<(T34+T45)/T23<1.8.
[0028] When the relation of -5.0<(R3+R4)/(R3-R4)<-0.75 is
satisfied, the curvature of the second lens element is more
suitable for favorably correcting the aberration of the system;
preferably, the following relation is satisfied:
-2.5<(R3+R4)/(R3-R4)<-1.05.
[0029] When the relation of -5.0<(R5+R6)/(R5-R6)<-0.8 is
satisfied, the curvature of the third lens element is averted from
being excessively large, and thereby the astigmatism of the system
can be corrected favorably; preferably, the following relation is
satisfied: -2.5<(R5+R6)/(R5-R6)<-1.05.
[0030] When the relation of -5.3<R7/R8<6.5 is satisfied, the
curvature of the fourth lens element is averted from being
excessively large, and thereby the aberration of the system can be
corrected favorably.
[0031] When the relation of 0.1<(T34+T45)/T23<1.8 is
satisfied, the interval between each lens element in the system is
more suitable, which is favorable for not only the arrangement and
assembly of the lens elements but also the organization of the
space in the system for keeping the system compact.
[0032] In the aforementioned image capturing optical lens system, a
focal length of the fourth lens element is f4, a focal length of
the fifth lens element is f5, and they preferably satisfy the
following relation: -1.3<f4/f5<-0.7. When the above relation
is satisfied, both the refractive power of the fourth lens element
and the fifth lens element are more suitable for effectively
correcting the aberration and astigmatism of the system.
[0033] In the aforementioned image capturing optical lens system,
an Abbe number of the first lens element is V1, an Abbe number of
the second lens element is V2, and they preferably satisfy the
following relation: 28<V1-V2<45. When the above relation is
satisfied, the chromatic aberration of the system can be corrected
favorably.
[0034] In the aforementioned image capturing optical lens system,
an Abbe number of the first lens element is V1, an Abbe number of
the third lens element is V3, and they preferably satisfy the
following relation: 28<V1-V3<45. When the above relation is
satisfied, the chromatic aberration of the system can be adjusted
and corrected favorably.
[0035] In the aforementioned image capturing optical lens system,
the curvature radius of the image-side surface of the fourth lens
element is R8, a focal length of the image capturing optical lens
system is f, and they preferably satisfy the following relation:
-0.5<R8/f<0. When the above relation is satisfied, the back
focal length can be effectively enlarged for ensuring that the
system has enough back focal length for placing other elements.
[0036] In the aforementioned image capturing optical lens system, a
focal length of the image capturing optical lens system is f, a
focal length of the third lens element is f3, and they preferably
satisfy the following relation: -1.3<f/f3<-0.2. When the
above relation is satisfied, the refractive power of the third lens
element is more suitable for distributing the positive refractive
power of the first lens element, and thereby the sensitivity of the
system can be reduced; more preferably, the following relation is
satisfied: -1.0<f/f3<-0.3.
[0037] In the aforementioned image capturing optical lens system,
the system further comprises a stop, an axial distance between the
stop and an image plane is SL, an axial distance between the
object-side surface of the first lens element and the image plane
is TTL, and they preferably satisfy the following relation:
0.70<SL/TTL<0.93. When the above relation is satisfied, the
arrangement of the stop can provide telecentricity, which is
favorable for averting from the occurrence of shading so that the
sensing efficiency can be improved.
[0038] In the aforementioned image capturing optical lens system, a
central thickness of the second lens element is CT2, a central
thickness of the third lens element is CT3, and they preferably
satisfy the following relation: 0.3<CT2/CT3<1.05. When the
above relation is satisfied, the arrangement of every lens element
in the system is more suitable for not only the manufacture and
assembly of the lens elements but also obtaining better image
quality.
[0039] In the aforementioned image capturing optical lens system, a
curvature radius of the object-side surface of the fifth lens
element is R9, a focal length of the image capturing optical lens
system is f, and they preferably satisfy the following relation:
-1.0<R9/f<0. When the above relation is satisfied, the high
order aberration can be adjusted.
[0040] In the aforementioned image capturing optical lens system,
an axial distance between the object-side surface of the first lens
element and the image plane is TTL, half of a diagonal length of an
effective photosensitive area of the image sensor is ImgH, and they
preferably satisfy the following relation: TTL/ImgH<2.0. When
the above relation is satisfied, it is favorable for keeping the
system compact in order to be equipped on portable electronic
products.
[0041] On the other hand, the present invention provides an image
capturing optical lens system, in order from an object side to an
image side comprising five lens elements with refractive power: a
first lens element with positive refractive power; a second lens
element with negative refractive power; a third lens element with
negative refractive power having a concave object-side surface and
at least one of the object-side surface and the image-side surface
thereof being aspheric; a fourth lens element with positive
refractive power having at least one of the object-side surface and
the image-side surface thereof being aspheric and made of plastic;
and a fifth lens element with negative refractive power having a
concave image-side surface, at least one of the object-side surface
and the image-side surface thereof being aspheric, at least one
inflection point is formed on at least one of the object-side
surface and the image-side surface thereof and made of plastic;
wherein 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, a curvature radius of the
object-side surface of the third lens element is R5, a curvature
radius of the image-side surface of the third lens element is R6,
the image capturing optical lens system further comprises a stop,
an axial distance between the stop and an image plane is SL, an
axial distance between the object-side surface of the first lens
element and the image plane is TTL, and they satisfy the following
relations: -5.0<(R3+R4)/(R3-R4)<-0.75;
-5.0<(R5+R6)/(R5-R6)<-0.8; and 0.70<SL/TTL<0.93.
[0042] When the relation of -5.0<(R3+R4)/(R3-R4)<-0.75 is
satisfied, the curvature of the second lens element is more
suitable for favorably correcting the aberration of the system;
preferably, the following relation is satisfied:
-2.5<(R3+R4)/(R3-R4)<-1.05.
[0043] When the relation of -5.0<(R5+R6)/(R5-R6)<-0.8 is
satisfied, the curvature of the third lens element is averted from
being excessively large, and thereby the astigmatism of the system
can be corrected favorably; preferably, the following relation is
satisfied: -2.5<(R5+R6)/(R5-R6)<-1.05.
[0044] When the relation of 0.70<SL/TTL<0.93 is satisfied,
the arrangement of the stop can provide telecentricity, which is
favorable for averting from the occurrence of shading so that the
sensing efficiency can be improved.
[0045] In the aforementioned image capturing optical lens system, a
focal length of the image capturing optical lens system is f, a
focal length of the third lens element is f3, and they preferably
satisfy the following relation: -1.0<f/f3<-0.3. When the
above relation is satisfied, the refractive power of the third lens
element is more suitable for distributing the positive refractive
power of the first lens element, and thereby the sensitivity of the
system can be reduced.
[0046] In the aforementioned image capturing optical lens system,
an Abbe number of the first lens element is V1, an Abbe number of
the second lens element is V2, and they preferably satisfy the
following relation: 28<V1-V2<45. When the above relation is
satisfied, the chromatic aberration of the system can be corrected
favorably.
[0047] In the aforementioned image capturing optical lens system,
an Abbe number of the first lens element is V1, an Abbe number of
the third lens element is V3, and they preferably satisfy the
following relation: 28<V1-V3<45. When the above relation is
satisfied, the chromatic aberration of the system can be adjusted
and corrected favorably.
[0048] In the aforementioned image capturing optical lens system, a
central thickness of the second lens element is CT2, a central
thickness of the third lens element is CT3, and they preferably
satisfy the following relation: 0.3<CT2/CT3<1.05. When the
above relation is satisfied, the arrangement of every lens element
in the system is more suitable for not only the manufacture and
assembly of the lens elements but also obtaining better image
quality.
[0049] In the aforementioned image capturing optical lens system,
the lens elements can be made of glass or plastic material. If the
lens elements are made of glass, the freedom for distributing the
refractive power of the image capturing optical lens system can be
increased. If plastic material is adopted to produce the lens
elements, the production cost will be reduced effectively.
Additionally, the surfaces of the lens elements can be aspheric and
easily made into non-spherical profiles, allowing more design
parameter freedom which can be used to reduce aberrations and the
number of the lens elements used in an optical system.
Consequently, the total track length of the image capturing optical
lens system can be effectively reduced.
[0050] In the present image capturing optical lens system, if a
lens element has a convex surface, it means the portion of the
surface in proximity to the optical axis is convex; if a lens
element has a concave surface, it means the portion of the surface
in proximity to the optical axis is concave.
[0051] In the present image capturing optical lens system, there
can be at least one stop, such as a glare stop or a field stop,
provided for eliminating stray light and thereby promoting image
resolution thereof.
[0052] Preferred embodiments of the present invention will be
described in the following paragraphs by referring to the
accompanying drawings.
Embodiment 1
[0053] FIG. 1A shows an image capturing optical lens system in
accordance with the first embodiment of the present invention, and
FIG. 1B shows the aberration curves of the first embodiment of the
present invention. The image capturing optical lens system of the
first embodiment of the present invention mainly comprises five
lens elements, in order from an object side to an image side:
[0054] a first lens element 110 made of plastic with positive
refractive power having a convex object-side surface 111 and a
convex image-side surface 112, the object-side and image-side
surfaces 111 and 112 thereof being aspheric;
[0055] a second lens element 120 made of plastic with negative
refractive power having a concave object-side surface 121 and a
convex image-side surface 122, the object-side and image-side
surfaces 121 and 122 thereof being aspheric;
[0056] a third lens element 130 made of plastic with negative
refractive power having a concave object-side surface 131 and a
convex image-side surface 132, the object-side and image-side
surfaces 131 and 132 thereof being aspheric;
[0057] a fourth lens element 140 made of plastic with positive
refractive power having a concave object-side surface 141 and a
convex image-side surface 142, the object-side and image-side
surfaces 141 and 142 thereof being aspheric; and
[0058] a fifth lens element 150 made of plastic with negative
refractive power having a concave object-side surface 151 and a
concave image-side surface 152, the object-side and image-side
surfaces 151 and 152 thereof being aspheric, and at least one
inflection point is formed on the image-side surface 152
thereof;
[0059] wherein an aperture stop 100 is disposed between the first
lens element 110 and the second lens element 120;
[0060] the image capturing optical lens system further comprises an
IR filter 160 disposed between the image-side surface 152 of the
fifth lens element 150 and an image plane 171, and the IR filter
160 is made of glass and has no influence on the focal length of
the image capturing optical lens system; the image capturing
optical lens system further comprises an image sensor 170 provided
on the image plane 171.
[0061] The detailed optical data of the first embodiment is shown
in TABLE 1, and the aspheric surface data is shown in TABLE 2,
wherein the units of the radius of curvature, the thickness and the
focal length are expressed in mm, and HFOV is half of the maximal
field of view.
TABLE-US-00001 TABLE 1 (Embodiment 1) f = 4.03 mm, Fno = 2.80, HFOV
= 35.1 deg. Focal Surface # Curvature Radius Thickness Material
Index Abbe # length 0 Object Plano Infinity 1 Lens 1 1.513050 (ASP)
0.553 Plastic 1.544 55.9 2.66 2 -28.260900 (ASP) -0.013 3 Ape. Stop
Plano 0.120 4 Lens 2 -3.718500 (ASP) 0.230 Plastic 1.640 23.3 -7.31
5 -18.573700 (ASP) 0.516 6 Lens 3 -5.081700 (ASP) 0.354 Plastic
1.640 23.3 -10.42 7 -21.929200 (ASP) 0.253 8 Lens 4 -3.107100 (ASP)
0.840 Plastic 1.544 55.9 1.98 9 -0.875450 (ASP) 0.333 10 Lens 5
-3.208200 (ASP) 0.361 Plastic 1.535 56.3 -1.84 11 1.478520 (ASP)
0.700 12 IR-filter Plano 0.210 Glass 1.517 64.2 -- 13 Plano 0.368
14 Image Plano -- * Reference wavelength is 587.6 nm (d-line)
TABLE-US-00002 TABLE 2 Aspheric Coefficients Surface # 1 2 4 5 6 k
= -5.97732E+00 -9.00000E+01 4.14464E+00 -7.45171E+01 3.76164E+01 A4
= 2.06960E-01 -6.90303E-02 2.60325E-02 2.41762E-02 -2.67235E-01 A6
= -2.01390E-01 3.43866E-02 1.06813E-01 4.10416E-02 -9.05600E-02 A8
= 1.93640E-01 6.39919E-03 1.35118E-01 4.47288E-02 2.03684E-01 A10 =
-1.84489E-01 -1.28341E-01 -1.01126E+00 -7.92295E-01 -4.48644E-01
A12 = 1.09643E-01 -1.66863E-01 1.10560E+00 1.41357E+00 2.27678E-01
A14 = -1.04043E-01 3.34870E-01 7.67375E-03 -1.20120E+00 Surface # 7
8 9 10 11 k = 5.20810E+01 1.30635E+00 -3.02797E+00 -3.36326E+01
-9.81397E+00 A4 = -2.14850E-01 -5.67398E-02 -1.01686E-01
-3.62189E-03 -4.99312E-02 A6 = 1.87812E-02 1.28426E-01 1.19412E-01
-2.80657E-02 1.38888E-02 A8 = 4.27433E-02 -2.15965E-01 -1.01397E-01
9.46298E-03 -5.18502E-03 A10 = -4.13178E-02 2.40336E-01 5.67904E-02
-6.27482E-04 1.25034E-03 A12 = 3.54939E-02 -1.31608E-01
-1.64566E-02 -1.19854E-04 -1.74699E-04 A14 = 2.69116E-02
1.60252E-03 1.69389E-05 1.08934E-05
[0062] The equation of the aspheric surface profiles is expressed
as follows:
X ( Y ) = ( Y 2 / R ) / ( 1 + sqrt ( 1 - ( 1 + k ) * ( Y / R ) 2 )
) + i ( Ai ) * ( Y i ) ##EQU00001##
[0063] wherein:
[0064] X: the height of a point on the aspheric surface at a
distance Y from the optical axis relative to the tangential plane
at the aspheric surface vertex;
[0065] Y: the distance from the point on the curve of the aspheric
surface to the optical axis;
[0066] k: the conic coefficient;
[0067] Ai: the aspheric coefficient of order i.
[0068] In the first embodiment of the present image capturing
optical lens system, the focal length of the image capturing
optical lens system is f, and it satisfies the following relation:
f=4.03 (mm).
[0069] In the first embodiment of the present image capturing
optical lens system, the f-number of the image capturing optical
lens system is Fno, and it satisfies the relation: Fno=2.80.
[0070] In the first embodiment of the present image capturing
optical lens system, half of the maximal field of view of the image
capturing optical lens system is HFOV, and it satisfies the
relation: HFOV=35.1 deg.
[0071] In the first embodiment of the present image capturing
optical lens system, the Abbe number of the first lens element 110
is V1, the Abbe number of the second lens element 120 is V2, and
they satisfy the relation: V1-V2=32.6.
[0072] In the first embodiment of the present image capturing
optical lens system, the Abbe number of the first lens element 110
is V1, the Abbe number of the third lens element 130 is V3, and it
satisfies the relation: V1-V3=32.6.
[0073] In the first embodiment of the present image capturing
optical lens system, the central thickness of the second lens
element 120 is CT2, the central thickness of the third lens element
130 is CT3, and they satisfy the relation: CT2/CT3=0.65.
[0074] In the first embodiment of the present image capturing
optical lens system, the axial distance between the third lens
element 130 and the fourth lens element 140 is T34, the axial
distance between the fourth lens element 140 and the fifth lens
element 150 is T45, the axial distance between the second lens
element 120 and the third lens element 130 is T23, and they satisfy
the relation: (T34+T45)/T23=1.14.
[0075] In the first embodiment of the present image capturing
optical lens system, the curvature radius of the object-side
surface 141 of the fourth lens element 140 is R7, the curvature
radius of the image-side surface 142 of the fourth lens element 140
is R8, and they satisfy the relation: R7/R8=3.55.
[0076] In the first embodiment of the present image capturing
optical lens system, the curvature radius of the image-side surface
142 of the fourth lens element 140 is R8, the focal length of the
image capturing optical lens system is f, and they satisfy the
relation: R8/f=-0.22.
[0077] In the first embodiment of the present image capturing
optical lens system, the curvature radius of the object-side
surface 151 of the fifth lens element 150 is R9, the focal length
of the image capturing optical lens system is f, and they satisfy
the relation: R9/f=-0.80.
[0078] In the first embodiment of the present image capturing
optical lens system, the curvature radius of the object-side
surface 121 of the second lens element 120 is R3, the curvature
radius of the image-side surface 122 of the second lens element 120
is R4, and they satisfy the relation: (R3+R4)/(R3-R4)=-1.50. In the
first embodiment of the present image capturing optical lens
system, the curvature radius of the object-side surface 131 of the
third lens element 130 is R5, the curvature radius of the
image-side surface 132 of the third lens element 130 is R6, and
they satisfy the relation: (R5+R6)/(R5-R6)=-1.60.
[0079] In the first embodiment of the present image capturing
optical lens system, the focal length of the third lens element 130
is f3, the focal length of the image capturing optical lens system
is f, and they satisfy the following relation: f/f3=-0.39.
[0080] In the first embodiment of the present image capturing
optical lens system, the focal length of the fourth lens element
140 is f4, the focal length of the fifth lens element 150 is f5,
and they satisfy the following relation: f4/f5=-1.08.
[0081] In the first embodiment of the present image capturing
optical lens system, the axial distance between the aperture stop
100 and the image plane 171 is SL, the axial distance between the
object-side surface 111 of the first lens element 110 and the image
plane 171 is TTL, and they satisfy the following relation:
SL/TTL=0.89.
[0082] In the first embodiment of the present image capturing
optical lens system, an axial distance between the object-side
surface 111 of the first lens element 110 and the image plane 171
is TTL, half of a diagonal length of an effective photosensitive
area of the image sensor 170 is ImgH, and they satisfy the
following relation: TTL/ImgH=1.66.
Embodiment 2
[0083] FIG. 2A shows an image capturing optical lens system in
accordance with the second embodiment of the present invention, and
FIG. 2B shows the aberration curves of the second embodiment of the
present invention. The image capturing optical lens system of the
second embodiment of the present invention mainly comprises five
lens elements, in order from an object side to an image side:
[0084] a first lens element 210 made of plastic with positive
refractive power having a convex object-side surface 211 and a
convex image-side surface 212, the object-side and image-side
surfaces 211 and 212 thereof being aspheric;
[0085] a second lens element 220 made of plastic with negative
refractive power having a concave object-side surface 221 and a
convex image-side surface 222, the object-side and image-side
surfaces 221 and 222 thereof being aspheric;
[0086] a third lens element 230 made of plastic with negative
refractive power having a concave object-side surface 231 and a
convex image-side surface 232, the object-side and image-side
surfaces 231 and 232 thereof being aspheric;
[0087] a fourth lens element 240 made of plastic with positive
refractive power having a convex object-side surface 241 and a
convex image-side surface 242, the object-side and image-side
surfaces 241 and 242 thereof being aspheric; and
[0088] a fifth lens element 250 made of plastic with negative
refractive power having a concave object-side surface 251 and a
concave image-side surface 252, the object-side and image-side
surfaces 251 and 252 thereof being aspheric, and at least one
inflection point is formed on the image-side surface 252
thereof;
[0089] wherein an aperture stop 200 is disposed between the first
lens element 210 and the second lens element 220;
[0090] the image capturing optical lens system further comprises an
IR filter 260 disposed between the image-side surface 252 of the
fifth lens element 250 and an image plane 271, and the IR filter
260 is made of glass and has no influence on the focal length of
the image capturing optical lens system; the image capturing
optical lens system further comprises an image sensor 270 provided
on the image plane 271.
[0091] The detailed optical data of the second embodiment is shown
in TABLE 3, and the aspheric surface data is shown in TABLE 4,
wherein the units of the radius of curvature, the thickness and the
focal length are expressed in mm, and HFOV is half of the maximal
field of view.
TABLE-US-00003 TABLE 3 (Embodiment 2) f = 3.91 mm, Fno = 2.52, HFOV
= 35.6 deg. Focal Surface # Curvature Radius Thickness Material
Index Abbe # length 0 Object Plano Infinity 1 Lens 1 2.154160 (ASP)
0.504 Plastic 1.544 55.9 3.27 2 -9.440300 (ASP) -0.008 3 Ape. Stop
Plano 0.180 4 Lens 2 -4.628400 (ASP) 0.264 Plastic 1.634 23.8 -9.76
5 -18.761700 (ASP) 0.544 6 Lens 3 -3.243100 (ASP) 0.284 Plastic
1.634 23.8 -5.50 7 -47.393400 (ASP) 0.444 8 Lens 4 4.950000 (ASP)
1.105 Plastic 1.544 55.9 1.84 9 -1.154730 (ASP) 0.449 10 Lens 5
-1.779980 (ASP) 0.345 Plastic 1.544 55.9 -2.04 11 3.150600 (ASP)
0.600 12 IR-filter Plano 0.300 Glass 1.517 64.2 -- 13 Plano 0.376
14 Image Plano -- * Reference wavelength is 587.6 nm (d-line)
TABLE-US-00004 TABLE 4 Aspheric Coefficients Surface # 1 2 4 5 6 k
= -1.62030E+00 -1.00000E+00 -8.36861E+00 -1.00000E+00 1.83412E+00
A4 = 7.51491E-04 -3.20000E-02 -2.67673E-02 -4.80319E-02
-3.09115E-01 A6 = 1.16905E-02 2.65571E-02 1.33626E-01 7.12903E-02
8.26416E-02 A8 = -5.50998E-02 -7.99375E-02 -2.84867E-01
-1.37193E-01 -1.05323E-01 A10 = 2.71766E-02 -3.75262E-02
2.66123E-01 5.62849E-02 1.19215E-01 A12 = -3.36566E-02 1.18791E-01
-1.07113E-01 3.27215E-02 -2.50721E-02 A14 = 5.15175E-03
-5.35846E-02 8.38942E-02 4.06114E-03 5.01605E-04 Surface # 7 8 9 10
11 k = -1.00000E+00 -1.00000E+00 -7.55107E-01 -2.80901E+00
-9.81397E+00 A4 = -2.97455E-01 -1.32700E-01 9.05106E-02 1.08374E-01
-4.99312E-02 A6 = 2.11783E-01 7.11211E-02 -3.29365E-02 -4.27944E-02
1.38888E-02 A8 = -1.27341E-01 8.69048E-03 3.54117E-02 7.56693E-03
-5.18502E-03 A10 = 6.27075E-02 -1.92184E-02 -1.10288E-02
-6.73075E-04 1.25034E-03 A12 = -7.42210E-03 6.47946E-03 1.20209E-03
5.45251E-05 -1.74699E-04 A14 = -2.08977E-03 -7.59677E-04
-2.46164E-05 -3.93913E-06 1.08934E-05 A16 = 4.78397E-08
[0092] The equation of the aspheric surface profiles of the second
embodiment has the same form as that of the first embodiment.
Moreover, the description of the factors in the relations is as
those set forth in the first embodiment, but the values of the
relations of the second embodiment are listed in the following
TABLE 5.
TABLE-US-00005 TABLE 5 (Embodiment 2) f 3.91 Fno 2.52 HFOV 35.6 V1
- V2 32.1 V1 - V3 32.1 CT2/CT3 0.93 (T34 + T45)/T23 1.64 R7/R8
-4.29 R8/f -0.30 R9/f -0.45 (R3 + R4)/(R3 - R4) -1.65 (R5 + R6)/(R5
- R6) -1.15 f/f3 -0.71 f4/f5 -0.90 SL/TTL 0.91 TTL/ImgH 1.85
Embodiment 3
[0093] FIG. 3A shows an image capturing optical lens system in
accordance with the third embodiment of the present invention, and
FIG. 3B shows the aberration curves of the third embodiment of the
present invention. The image capturing optical lens system of the
third embodiment of the present invention mainly comprises five
lens elements, in order from an object side to an image side:
[0094] a first lens element 310 made of plastic with positive
refractive power having a convex object-side surface 311 and a
convex image-side surface 312, the object-side and image-side
surfaces 311 and 312 thereof being aspheric;
[0095] a second lens element 320 made of plastic with negative
refractive power having a concave object-side surface 321 and a
concave image-side surface 322, the object-side and image-side
surfaces 321 and 322 thereof being aspheric;
[0096] a third lens element 330 made of plastic with negative
refractive power having a concave object-side surface 331 and a
convex image-side surface 332, the object-side and image-side
surfaces 331 and 332 thereof being aspheric;
[0097] a fourth lens element 340 made of plastic with positive
refractive power having a convex object-side surface 341 and a
convex image-side surface 342, the object-side and image-side
surfaces 341 and 342 thereof being aspheric; and
[0098] a fifth lens element 350 made of plastic with negative
refractive power having a concave object-side surface 351 and a
concave image-side surface 352, the object-side and image-side
surfaces 351 and 352 thereof being aspheric, and at least one
inflection point is formed on the image-side surface 352
thereof;
[0099] wherein an aperture stop 300 is disposed between the first
lens element 310 and the second lens element 320;
[0100] the image capturing optical lens system further comprises an
IR filter 360 disposed between the image-side surface 352 of the
fifth lens element 350 and an image plane 371, and the IR filter
360 is made of glass and has no influence on the focal length of
the image capturing optical lens system; the image capturing
optical lens system further comprises an image sensor 370 provided
on the image plane 371.
[0101] The detailed optical data of the third embodiment is shown
in TABLE 6, and the aspheric surface data is shown in TABLE 7,
wherein the units of the radius of curvature, the thickness and the
focal length are expressed in mm, and HFOV is half of the maximal
field of view.
TABLE-US-00006 TABLE 6 (Embodiment 3) f = 4.17 mm. Fno = 2.76, HFOV
= 34.6 deg. Focal Surface # Curvature Radius Thickness Material
Index Abbe # length 0 Object Plano Infinity 1 Lens 1 1.855460 (ASP)
0.532 Plastic 1.544 55.9 2.91 2 -9.681500 (ASP) 0.008 3 Ape. Stop
Plano 0.112 4 Lens 2 -5.569900 (ASP) 0.264 Plastic 1.640 23.3 -8.37
5 142.857100 (ASP) 0.549 6 Lens 3 -3.162800 (ASP) 0.361 Plastic
1.634 23.8 -5.94 7 -20.687200 (ASP) 0.390 8 Lens 4 5.653600 (ASP)
1.025 Plastic 1.544 55.9 1.78 9 -1.097060 (ASP) 0.388 10 Lens 5
-1.041270 (ASP) 0.345 Plastic 1.544 55.9 -1.68 11 8.517900 (ASP)
0.600 12 IR-filter Plano 0.300 Glass 1.517 64.2 -- 13 Plano 0.334
14 Image Plano -- * Reference wavelength is 587.6 nm (d-line)
TABLE-US-00007 TABLE 7 Aspheric Coefficients Surface # 1 2 4 5 6 k
= -1.15472E+00 -1.00000E+00 -8.62478E-01 -1.00000E+00 2.43100E+00
A4 = 7.44791E-03 -3.27797E-02 -2.68047E-02 -6.15815E-02
-3.14102E-01 A6 = 4.21362E-03 5.39507E-02 1.50328E-01 6.39979E-02
1.16788E-01 A8 = -3.98231E-02 -5.85905E-02 -2.32727E-01
-1.10045E-01 -1.01445E-01 A10 = 3.37192E-02 -5.95516E-02
1.56729E-01 -3.25800E-02 5.91284E-02 A12 = -3.36566E-02 1.18791E-01
-1.07113E-01 3.27215E-02 -2.50721E-02 A14 = 5.15176E-03
-5.35846E-02 8.38942E-02 4.06114E-03 5.01603E-04 Surface # 7 8 9 10
11 k = -1.00000E+00 -1.00000E+00 -7.67322E-01 -2.06692E+00
-1.00000E+00 A4 = -2.90488E-01 -1.42795E-01 1.05495E-01 1.04087E-01
3.66436E-03 A6 = 2.25366E-01 7.33533E-02 -3.25957E-02 -4.18584E-02
-1.02619E-02 A8 = -1.25525E-01 8.96773E-03 3.49897E-02 7.91291E-03
1.69889E-03 A10 = 6.08192E-02 -1.92971E-02 -1.11269E-02
-6.52606E-04 -7.73389E-06 A12 = -4.62906E-03 6.46275E-03
1.20235E-03 4.32930E-05 -2.16808E-05 A14 = -1.74917E-03
-7.64459E-04 -1.59977E-05 -2.53309E-06 -1.11706E-06 A16 =
-1.93308E-07 3.65940E-07
[0102] The equation of the aspheric surface profiles of the third
embodiment has the same form as that of the first embodiment.
Moreover, the description of the factors in the relations is as
those set forth in the first embodiment, but the values of the
relations of the third embodiment are listed in the following TABLE
8.
TABLE-US-00008 TABLE 8 (Embodiment 3) f 4.17 Fno 2.76 HFOV 34.6 V1
- V2 32.6 V1 - V3 32.1 CT2/CT3 0.73 (T34 + T45)/T23 1.42 R7/R8
-5.15 R8/f -0.26 R9/f -0.25 (R3 + R4)/(R3 - R4) -0.92 (R5 + R6)/(R5
- R6) -1.36 f/f3 -0.70 f4/f5 -1.06 SL/TTL 0.89 TTL/ImgH 1.79
Embodiment 4
[0103] FIG. 4A shows an image capturing optical lens system in
accordance with the fourth embodiment of the present invention, and
FIG. 4B shows the aberration curves of the fourth embodiment of the
present invention. The image capturing optical lens system of the
fourth embodiment of the present invention mainly comprises five
lens elements, in order from an object side to an image side:
[0104] a first lens element 410 made of plastic with positive
refractive power having a convex object-side surface 411 and a
convex image-side surface 412, the object-side and image-side
surfaces 411 and 412 thereof being aspheric;
[0105] a second lens element 420 made of plastic with negative
refractive power having a concave object-side surface 421 and a
concave image-side surface 422, the object-side and image-side
surfaces 421 and 422 thereof being aspheric;
[0106] a third lens element 430 made of plastic with negative
refractive power having a concave object-side surface 431 and a
concave image-side surface 432, the object-side and image-side
surfaces 431 and 432 thereof being aspheric;
[0107] a fourth lens element 440 made of plastic with positive
refractive power having a convex object-side surface 441 and a
convex image-side surface 442, the object-side and image-side
surfaces 441 and 442 thereof being aspheric; and
[0108] a fifth lens element 450 made of plastic with negative
refractive power having a concave object-side surface 451 and a
concave image-side surface 452, the object-side and image-side
surfaces 451 and 452 thereof being aspheric, and at least one
inflection point is formed on the image-side surface 452
thereof;
[0109] wherein an aperture stop 400 is disposed between the first
lens element 410 and the second lens element 420;
[0110] the image capturing optical lens system further comprises an
IR filter 460 disposed between the image-side surface 452 of the
fifth lens element 450 and an image plane 471, and the IR filter
460 is made of glass and has no influence on the focal length of
the image capturing optical lens system; the image capturing
optical lens system further comprises an image sensor 470 provided
on the image plane 471.
[0111] The detailed optical data of the fourth embodiment is shown
in TABLE 9, and the aspheric surface data is shown in TABLE 10,
wherein the units of the radius of curvature, the thickness and the
focal length are expressed in mm, and HFOV is half of the maximal
field of view.
TABLE-US-00009 TABLE 9 (Embodiment 4) f = 4.12 mm, Fno = 2.72, HFOV
= 34.6 deg. Focal Surface # Curvature Radius Thickness Material
Index Abbe # length 0 Object Plano Infinity 1 Lens 1 1.872460 (ASP)
0.533 Plastic 1.544 55.9 2.89 2 -8.817200 (ASP) 0.002 3 Ape. Stop
Plano 0.091 4 Lens 2 -6.086000 (ASP) 0.264 Plastic 1.640 23.3 -8.75
5 71.428600 (ASP) 0.673 6 Lens 3 -3.744900 (ASP) 0.368 Plastic
1.640 23.3 -5.45 7 52.631600 (ASP) 0.243 8 Lens 4 3.940500 (ASP)
1.087 Plastic 1.544 55.9 1.64 9 -1.041650 (ASP) 0.275 10 Lens 5
-0.964360 (ASP) 0.345 Plastic 1.544 55.9 -1.57 11 8.517900 (ASP)
0.600 12 IR-filter Plano 0.300 Glass 1.517 64.2 -- 13 Plano 0.333
14 Image Plano -- * Reference wavelength is 587.6 nm (d-line)
TABLE-US-00010 TABLE 10 Aspheric Coefficients Surface # 1 2 4 5 6 k
= -1.33718E+00 -1.00000E+00 -4.43040E+00 -1.00000E+00 -1.00000E+01
A4 = 4.01690E-03 -4.38500E-02 -3.07207E-02 -3.34876E-02
-2.81798E-01 A6 = 5.19565E-03 6.97735E-02 1.71776E-01 4.85494E-02
1.03280E-01 A8 = -5.20229E-02 -6.80629E-02 -2.80765E-01
-9.24214E-02 -9.65794E-02 A10 = 4.52589E-02 -5.34099E-02
2.11200E-01 -1.36316E-02 7.41622E-02 A12 = -3.36566E-02 1.18791E-01
-1.07113E-01 3.27215E-02 -2.50721E-02 A14 = 5.15176E-03
-5.35846E-02 8.38942E-02 4.06114E-03 5.01604E-04 Surface # 7 8 9 10
11 k = -1.00000E+00 -1.00000E+00 -7.75792E-01 -1.42147E+00
-1.00000E+00 A4 = -2.95400E-01 -1.76705E-01 1.16815E-01 1.06022E-01
-1.12677E-02 A6 = 2.09150E-01 7.84970E-02 -3.64736E-02 -4.01396E-02
-6.86480E-03 A8 = -1.20586E-01 8.55008E-03 3.45758E-02 8.24537E-03
1.43651E-03 A10 = 6.21327E-02 -1.94101E-02 -1.11108E-02
-6.10398E-04 -3.19004E-05 A12 = -4.88612E-03 6.47621E-03
1.22317E-03 4.36161E-05 -2.09879E-05 A14 = -2.40111E-03
-7.58818E-04 -3.81004E-06 -3.15540E-06 -7.67466E-07 A16 =
-8.16383E-07 4.19184E-07
[0112] The equation of the aspheric surface profiles of the fourth
embodiment has the same form as that of the first embodiment.
Moreover, the description of the factors in the relations is as
those set forth in the first embodiment, but the values of the
relations of the fourth embodiment are listed in the following
TABLE 11.
TABLE-US-00011 TABLE 11 (Embodiment 4) f 4.12 Fno 2.72 HFOV 34.6 V1
- V2 32.6 V1 - V3 32.6 CT2/CT3 0.72 (T34 + T45)/T23 0.77 R7/R8
-3.78 R8/f -0.25 R9/f -0.23 (R3 + R4)/(R3 - R4) -0.84 (R5 + R6)/(R5
- R6) -0.87 f/f3 -0.76 f4/f5 -1.04 SL/TTL 0.89 TTL/ImgH 1.76
Embodiment 5
[0113] FIG. 5A shows an image capturing optical lens system in
accordance with the fifth embodiment of the present invention, and
FIG. 5B shows the aberration curves of the fifth embodiment of the
present invention. The image capturing optical lens system of the
fifth embodiment of the present invention mainly comprises five
lens elements, in order from an object side to an image side:
[0114] a first lens element 510 made of plastic with positive
refractive power having a convex object-side surface 511 and a
convex image-side surface 512, the object-side and image-side
surfaces 511 and 512 thereof being aspheric;
[0115] a second lens element 520 made of plastic with negative
refractive power having a concave object-side surface 521 and a
convex image-side surface 522, the object-side and image-side
surfaces 521 and 522 thereof being aspheric;
[0116] a third lens element 530 made of plastic with negative
refractive power having a concave object-side surface 531 and a
convex image-side surface 532, the object-side and image-side
surfaces 531 and 532 thereof being aspheric;
[0117] a fourth lens element 540 made of plastic with positive
refractive power having a convex object-side surface 541 and a
convex image-side surface 542, the object-side and image-side
surfaces 541 and 542 thereof being aspheric; and
[0118] a fifth lens element 550 made of plastic with negative
refractive power having a concave object-side surface 551 and a
concave image-side surface 552, the object-side and image-side
surfaces 551 and 552 thereof being aspheric, and at least one
inflection point is formed on the image-side surface 552
thereof;
[0119] wherein an aperture stop 500 is disposed between an imaged
object and the first lens element 510;
[0120] the image capturing optical lens system further comprises an
IR filter 560 disposed between the image-side surface 552 of the
fifth lens element 550 and an image plane 571, and the IR filter
560 is made of glass and has no influence on the focal length of
the image capturing optical lens system; the image capturing
optical lens system further comprises an image sensor 570 provided
on the image plane 571.
[0121] The detailed optical data of the fifth embodiment is shown
in TABLE 12, and the aspheric surface data is shown in TABLE 13,
wherein the units of the radius of curvature, the thickness and the
focal length are expressed in mm, and HFOV is half of the maximal
field of view.
TABLE-US-00012 TABLE 12 (Embodiment 5) f = 4.15 mm, Fno = 2.70,
HFOV = 34.6 deg. Focal Surface # Curvature Radius Thickness
Material Index Abbe # length 0 Object Plano Infinity 1 Ape. Stop
Plano -0.108 2 Lens 1 1.938620 (ASP) 0.688 Plastic 1.544 55.9 2.88
3 -7.171200 (ASP) 0.114 4 Lens 2 -4.314400 (ASP) 0.286 Plastic
1.640 23.3 -8.71 5 -19.569500 (ASP) 0.594 6 Lens 3 -3.332200 (ASP)
0.309 Plastic 1.640 23.3 -6.51 7 -17.301000 (ASP) 0.203 8 Lens 4
5.228300 (ASP) 1.033 Plastic 1.544 55.9 1.66 9 -1.018100 (ASP)
0.275 10 Lens 5 -0.930940 (ASP) 0.345 Plastic 1.544 55.9 -1.51 11
7.796600 (ASP) 0.600 12 IR-filter Plano 0.300 Glass 1.517 64.2 --
13 Plano 0.331 14 Image Plano -- * Reference wavelength is 587.6 nm
(d-line)
TABLE-US-00013 TABLE 13 Aspheric Coefficients Surface # 2 3 4 5 6 k
= -1.25062E+00 -1.00000E+00 3.00000E+00 3.00000E+00 -1.00000E+01 A4
= 5.17002E-03 -8.15068E-02 -5.09176E-02 -3.14626E-02 -2.64760E-01
A6 = -3.05450E-02 4.25363E-02 9.90341E-02 2.17779E-02 1.09387E-01
A8 = 2.86215E-02 -1.73139E-01 -3.01628E-01 -1.01686E-01
-1.10983E-01 A10 = -4.14979E-02 3.98324E-03 2.01033E-01 3.30763E-03
7.63643E-02 A12 = -3.36566E-02 1.18791E-01 -1.07113E-01 1.28456E-02
-2.78022E-02 A14 = 5.15176E-03 -5.35846E-02 8.38942E-02 4.55814E-03
-3.05650E-03 Surface # 7 8 9 10 11 k = 3.00000E+00 -1.00000E+01
-7.77239E-01 -1.74422E+00 -1.00000E+00 A4 = -2.88655E-01
-1.99351E-01 1.31863E-01 1.07140E-01 -1.09835E-02 A6 = 2.06577E-01
9.04463E-02 -4.07443E-02 -4.07625E-02 -5.76303E-03 A8 =
-1.14121E-01 6.42415E-03 3.41444E-02 7.94019E-03 1.11725E-03 A10 =
6.38981E-02 -1.98659E-02 -1.12072E-02 -6.92061E-04 -3.86725E-05 A12
= -4.15652E-03 6.36393E-03 1.18630E-03 3.43317E-05 -1.55123E-05 A14
= -3.18479E-03 -8.91854E-04 -1.11082E-05 -1.25917E-06 -3.97671E-07
A16 = 2.20730E-07 3.50127E-07
[0122] The equation of the aspheric surface profiles of the fifth
embodiment has the same form as that of the first embodiment.
Moreover, the description of the factors in the relations is as
those set forth in the first embodiment, but the values of the
relations of the fifth embodiment are listed in the following TABLE
14.
TABLE-US-00014 TABLE 14 (Embodiment 5) f 4.15 Fno 2.70 HFOV 34.6 V1
- V2 32.6 V1 - V3 32.6 CT2/CT3 0.72 (T34 + T45)/T23 0.77 R7/R8
-5.14 R8/f -0.25 R9/f -0.22 (R3 + R4)/(R3 - R4) -1.57 (R5 + R6)/(R5
- R6) -1.48 f/f3 -0.64 f4/f5 -1.10 SL/TTL 0.98 TTL/ImgH 1.74
Embodiment 6
[0123] FIG. 6A shows an image capturing optical lens system in
accordance with the sixth embodiment of the present invention, and
FIG. 6B shows the aberration curves of the sixth embodiment of the
present invention. The image capturing optical lens system of the
sixth embodiment of the present invention mainly comprises five
lens elements, in order from an object side to an image side:
[0124] a first lens element 610 made of plastic with positive
refractive power having a convex object-side surface 611 and a
concave image-side surface 612, the object-side and image-side
surfaces 611 and 612 thereof being aspheric;
[0125] a second lens element 620 made of plastic with negative
refractive power having a concave object-side surface 621 and a
convex image-side surface 622, the object-side and image-side
surfaces 621 and 622 thereof being aspheric;
[0126] a third lens element 630 made of plastic with negative
refractive power having a concave object-side surface 631 and a
convex image-side surface 632, the object-side and image-side
surfaces 631 and 632 thereof being aspheric;
[0127] a fourth lens element 640 made of plastic with positive
refractive power having a concave object-side surface 641 and a
convex image-side surface 642, the object-side and image-side
surfaces 641 and 642 thereof being aspheric; and
[0128] a fifth lens element 650 made of plastic with negative
refractive power having a concave object-side surface 651 and a
concave image-side surface 652, the object-side and image-side
surfaces 651 and 652 thereof being aspheric, and at least one
inflection point is formed on the image-side surface 652
thereof;
[0129] wherein an aperture stop 600 is disposed between the first
lens element 610 and the second lens element 620;
[0130] the image capturing optical lens system further comprises an
IR filter 660 disposed between the image-side surface 652 of the
fifth lens element 650 and an image plane 671, and the IR filter
660 is made of glass and has no influence on the focal length of
the image capturing optical lens system; the image capturing
optical lens system further comprises an image sensor 670 provided
on the image plane 671.
[0131] The detailed optical data of the sixth embodiment is shown
in TABLE 15, and the aspheric surface data is shown in TABLE 16,
wherein the units of the radius of curvature, the thickness and the
focal length are expressed in mm, and HFOV is half of the maximal
field of view.
TABLE-US-00015 TABLE 15 (Embodiment 6) f = 4.11 mm, Fno = 2.81,
HFOV = 34.6 deg. Focal Surface # Curvature Radius Thickness
Material Index Abbe # length 0 Object Plano Infinity 1 Lens 1
1.362930 (ASP) 0.595 Plastic 1.544 55.9 2.66 2 19.193900 (ASP)
0.028 3 Ape. Stop Plano 0.096 4 Lens 2 -3.332700 (ASP) 0.264
Plastic 1.640 23.3 -8.03 5 -9.779000 (ASP) 0.441 6 Lens 3 -3.160100
(ASP) 0.264 Plastic 1.634 23.8 -7.88 7 -8.881000 (ASP) 0.293 8 Lens
4 -4.424800 (ASP) 1.039 Plastic 1.544 55.9 1.85 9 -0.886420 (ASP)
0.371 10 Lens 5 -1.162800 (ASP) 0.345 Plastic 1.544 55.9 -1.86 11
8.517900 (ASP) 0.600 12 IR-filter Plano 0.300 Glass 1.517 64.2 --
13 Plano 0.335 14 Image Plano -- * Reference wavelength is 587.6 nm
(d-line)
TABLE-US-00016 TABLE 16 Aspheric Coefficients Surface # 1 2 4 5 6 k
= -5.29073E-01 3.00000E+00 -1.00000E+01 -1.00000E+00 -1.11903E+00
A4 = 2.22092E-02 -7.98842E-02 1.92498E-02 1.09408E-01 -3.67700E-01
A6 = -4.79115E-03 -4.01038E-02 1.43875E-01 1.69076E-01 4.69291E-02
A8 = 2.60836E-02 4.28402E-02 -1.38667E-01 -1.19296E-01 -1.28534E-01
A10 = -8.33368E-02 -1.22322E-01 2.71316E-01 1.94973E-01 2.42020E-02
A12 = -3.71644E-02 1.21917E-01 -1.12858E-01 5.36682E-02
-2.88029E-02 A14 = -3.33710E-04 -3.06454E-02 1.88828E-02
4.54331E-02 -7.91448E-03 Surface # 7 8 9 10 11 k = -1.00000E+00
1.73354E+00 -7.63796E-01 -2.78565E+00 -1.00000E+00 A4 =
-3.17386E-01 -2.03887E-01 1.22556E-01 8.29588E-02 -1.42881E-02 A6 =
1.95220E-01 1.20991E-01 -5.00100E-02 -4.24633E-02 -5.72857E-03 A8 =
-1.17895E-01 1.13854E-02 3.73564E-02 8.17172E-03 1.15569E-03 A10 =
7.48731E-02 -2.60132E-02 -1.07269E-02 -5.81112E-04 -4.38947E-05 A12
= -4.88303E-03 1.89459E-03 1.32791E-03 5.15088E-05 -1.52056E-05 A14
= -6.46124E-03 1.34799E-03 1.41239E-04 -3.02971E-06 -2.18617E-08
A16 = -6.85169E-07 2.66285E-07
[0132] The equation of the aspheric surface profiles of the sixth
embodiment has the same form as that of the first embodiment.
Moreover, the description of the factors in the relations is as
those set forth in the first embodiment, but the values of the
relations of the sixth embodiment are listed in the following TABLE
17.
TABLE-US-00017 TABLE 17 (Embodiment 6) f 4.11 Fno 2.81 HFOV 34.6 V1
- V2 32.6 V1 - V3 32.1 CT2/CT3 1.00 (T34 + T45)/T23 1.51 R7/R8 4.99
R8/f -0.22 R9/f -0.28 (R3 + R4)/(R3 - R4) -2.03 (R5 + R6)/(R5 - R6)
-2.10 f/f3 -0.52 f4/f5 -0.99 SL/TTL 0.87 TTL/ImgH 1.71
Embodiment 7
[0133] FIG. 7A shows an image capturing optical lens system in
accordance with the seventh embodiment of the present invention,
and FIG. 7B shows the aberration curves of the seventh embodiment
of the present invention. The image capturing optical lens system
of the seventh embodiment of the present invention mainly comprises
five lens elements, in order from an object side to an image
side:
[0134] a first lens element 710 made of plastic with positive
refractive power having a convex object-side surface 711 and a
concave image-side surface 712, the object-side and image-side
surfaces 711 and 712 thereof being aspheric;
[0135] a second lens element 720 made of plastic with negative
refractive power having a concave object-side surface 721 and a
convex image-side surface 722, the object-side and image-side
surfaces 721 and 722 thereof being aspheric;
[0136] a third lens element 730 made of plastic with negative
refractive power having a concave object-side surface 731 and a
convex image-side surface 732, the object-side and image-side
surfaces 731 and 732 thereof being aspheric;
[0137] a fourth lens element 740 made of plastic with positive
refractive power having a concave object-side surface 741 and a
convex image-side surface 742, the object-side and image-side
surfaces 741 and 742 thereof being aspheric; and
[0138] a fifth lens element 750 made of plastic with negative
refractive power having a convex object-side surface 751 and a
concave image-side surface 752, the object-side and image-side
surfaces 751 and 752 thereof being aspheric, and at least one
inflection point is formed on both the object-side surface 751 and
the image-side surface 752 thereof;
[0139] wherein an aperture stop 700 is disposed between the first
lens element 710 and the second lens element 720;
[0140] the image capturing optical lens system further comprises an
IR filter 760 disposed between the image-side surface 752 of the
fifth lens element 750 and an image plane 771, and the IR filter
760 is made of glass and has no influence on the focal length of
the image capturing optical lens system; the image capturing
optical lens system further comprises an image sensor 770 provided
on the image plane 771.
[0141] The detailed optical data of the seventh embodiment is shown
in TABLE 18, and the aspheric surface data is shown in TABLE 19,
wherein the units of the radius of curvature, the thickness and the
focal length are expressed in mm, and HFOV is half of the maximal
field of view.
TABLE-US-00018 TABLE 18 (Embodiment 7) f = 3.34 mm, Fno = 2.80,
HFOV = 33.4 deg. Focal Surface # Curvature Radius Thickness
Material Index Abbe # length 0 Object Plano Infinity 1 Lens 1
1.401440 (ASP) 0.426 Plastic 1.544 55.9 2.63 2 64.545200 (ASP)
0.006 3 Ape. Stop Plano 0.079 4 Lens 2 -4.672500 (ASP) 0.250
Plastic 1.634 23.8 -11.25 5 -13.820100 (ASP) 0.432 6 Lens 3
-3.174300 (ASP) 0.250 Plastic 1.634 23.8 -6.07 7 -18.723600 (ASP)
0.178 8 Lens 4 -2.404490 (ASP) 0.668 Plastic 1.544 55.9 1.52 9
-0.674930 (ASP) 0.083 10 Lens 5 6.073700 (ASP) 0.405 Plastic 1.544
55.9 -1.69 11 0.778350 (ASP) 0.800 12 IR-filter Plano 0.300 Glass
1.517 64.2 -- 13 Plano 0.379 14 Image Plano -- * Reference
wavelength is 587.6 nm (d-line)
TABLE-US-00019 TABLE 19 Aspheric Coefficients Surface # 1 2 4 5 6 k
= -7.03686E+00 -1.00000E+00 -2.90000E+01 -1.00000E+00 6.94765E+00
A4 = 2.79504E-01 -3.09574E-01 -2.93006E-01 -1.05373E-01
-5.84100E-01 A6 = -4.48420E-01 4.85731E-01 1.01696E+00 4.77876E-01
2.50977E-01 A8 = 3.73228E-01 -1.79422E+00 -2.09176E+00 2.36327E-02
1.04437E-01 A10 = -1.77527E-01 3.83953E+00 3.69732E+00 -2.56363E+00
6.57281E-01 A12 = -9.70753E-01 -3.93405E+00 -1.41821E+00
6.38885E+00 -7.63185E-01 A14 = -4.10824E-01 1.03977E+00
-2.43807E+00 -5.05707E+00 4.92743E-01 A16 = 1.49141E+00
-7.49463E-04 1.36913E-03 -4.91015E-03 Surface # 7 8 9 10 11 k =
1.00000E+01 -1.53176E+01 -3.53211E+00 0.00000E+00 -5.89595E+00 A4 =
-5.67986E-01 -3.71876E-01 -2.77664E-01 -6.55250E-02 -1.28404E-01 A6
= 7.99772E-01 9.64785E-01 5.02262E-01 7.84463E-03 1.09334E-01 A8 =
-7.65057E-01 -1.20360E+00 -4.92757E-01 3.38241E-02 -6.88197E-02 A10
= 8.34430E-01 1.05290E+00 4.03981E-01 -4.43906E-02 2.62602E-02 A12
= -4.58229E-01 -7.15917E-01 -2.12186E-01 2.94581E-02 -5.38047E-03
A14 = 1.25577E-01 2.56687E-01 3.70404E-02 -1.00083E-02 4.40965E-04
A16 = -3.05899E-02 6.41330E-04 1.31853E-03
[0142] The equation of the aspheric surface profiles of the seventh
embodiment has the same form as that of the first embodiment.
Moreover, the description of the factors in the relations is as
those set forth in the first embodiment, but the values of the
relations of the seventh embodiment are listed in the following
TABLE 20.
TABLE-US-00020 TABLE 20 (Embodiment 7) f 3.34 Fno 2.80 HFOV 33.4 V1
- V2 32.1 V1 - V3 32.1 CT2/CT3 1.00 (T34 + T45)/T23 0.60 R7/R8 3.56
R8/f -0.20 R9/f 1.82 (R3 + R4)/(R3 - R4) -2.02 (R5 + R6)/(R5 - R6)
-1.41 f/f3 -0.55 f4/f5 -0.90 SL/TTL 0.90 TTL/ImgH 1.89
[0143] It is to be noted that TABLES 1-20 show different data of
the different embodiments, however, the data of the different
embodiments are obtained from experiments. Therefore, any image
capturing optical lens system of the same structure is considered
to be within the scope of the present invention even if it uses
different data. The embodiments depicted above and the appended
drawings are exemplary and are not intended to limit the scope of
the present invention.
* * * * *