U.S. patent number RE47,370 [Application Number 15/379,852] was granted by the patent office on 2019-04-30 for optical imaging system.
This patent grant is currently assigned to Samsung Electronics Co., Ltd.. The grantee listed for this patent is SAMSUNG ELECTRONICS CO., LTD.. Invention is credited to Ki-Tae Kim, Seong-Ha Park.
View All Diagrams
United States Patent |
RE47,370 |
Park , et al. |
April 30, 2019 |
Optical imaging system
Abstract
An optical imaging system is provided comprising a first lens
group having a positive refractive power; a second lens group
having a negative refractive power; a third lens group having a
positive or negative power; and a fourth lens group having a
positive or negative power.
Inventors: |
Park; Seong-Ha (Yongin-si,
KR), Kim; Ki-Tae (Seongnam-si, KR) |
Applicant: |
Name |
City |
State |
Country |
Type |
SAMSUNG ELECTRONICS CO., LTD. |
Suwon-si, Gyeonggi-do |
N/A |
KR |
|
|
Assignee: |
Samsung Electronics Co., Ltd.
(Suwon-si, KR)
|
Family
ID: |
37597344 |
Appl.
No.: |
15/379,852 |
Filed: |
December 15, 2016 |
Related U.S. Patent Documents
|
|
|
|
|
|
|
Application
Number |
Filing Date |
Patent Number |
Issue Date |
|
|
14153566 |
Jan 13, 2014 |
RE46262 |
|
|
|
12970720 |
Dec 16, 2010 |
RE44773 |
|
|
Reissue of: |
11473154 |
Jun 21, 2006 |
7466497 |
Dec 16, 2008 |
|
Reissue of: |
11473154 |
Jun 21, 2006 |
7466497 |
|
|
Reissue of: |
11473154 |
Jun 21, 2006 |
7466497 |
|
|
|
Foreign Application Priority Data
|
|
|
|
|
Jul 7, 2005 [KR] |
|
|
10-2005-0061174 |
|
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
G02B
9/34 (20130101); G02B 9/36 (20130101); G02B
9/34 (20130101); G02B 9/36 (20130101); G02B
13/004 (20130101); G02B 13/004 (20130101) |
Current International
Class: |
G02B
9/34 (20060101); G02B 9/36 (20060101); G02B
13/00 (20060101); G02B 3/02 (20060101); G02B
5/20 (20060101) |
Field of
Search: |
;359/715,771,772,773,779 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
|
|
|
|
|
|
|
1627118 |
|
Jun 2005 |
|
CN |
|
2005-1027 |
|
Jan 2002 |
|
JP |
|
2005-004027 |
|
Jan 2005 |
|
JP |
|
Other References
Hecht, Eugene. Optics, Fourth Edition, Addison Wesley, San
Francisco, CA, U.S.A., 2002, pp. 243-246. cited by examiner .
Office Action issued in related application KR 10-2005-0061174,
Aug. 30, 2006, with English language translation, 5 pages. cited by
applicant .
Park, Young-Woo; Patent Application Publication No. US 2004/0136097
A1; Publication Date: Jul. 15, 2004; "Photographing Lens;" . . . .
cited by applicant.
|
Primary Examiner: Leung; Christina Y.
Attorney, Agent or Firm: Jefferson IP Law, LLP
Parent Case Text
.[.CLAIM OF PRIORITY.]. .Iadd.CROSS-REFERENCE TO RELATED
APPLICATIONS.Iaddend.
.Iadd.Notice: More than one reissue application has been filed for
the reissue of U.S. Pat. No. 7,466,497. The reissue applications
are application Ser. No. 12/970,720 (a reissue application of U.S.
Pat. No. 7,466,497, reissued as RE44,773), Ser. No. 14/153,566 (a
divisional reissue of Ser. No. 12/970,720, reissued as RE46,262),
Ser. No. 14/153,710 (a continuation reissue of Ser. No.
12/970,720), and Ser. No. 15/379,852 (this application, a
continuation reissue application of Ser. No. 14/153,566), all of
which are reissues of U.S. Pat. No. 7,466,497..Iaddend.
.Iadd.This application is a continuation reissue application of
U.S. patent application Ser. No. 14/153,566, filed Jan. 13, 2014
and reissued as RE46,262, which is a divisional reissue application
of U.S. patent application Ser. No. 12/970,720, filed Dec. 16, 2010
and reissued as RE44,773, which is an application for reissue of
U.S. Pat. No. 7,466,497, the contents of which are incorporated
herein by reference..Iaddend.
This application claims priority to an application entitled
"Optical Imaging System," filed with the Korean Intellectual
Property Office on Jul. 7, 2005 and assigned Serial No. 2005-61174,
the contents of which are incorporated herein by reference.
Claims
What is claimed is:
.[.1. An optical imaging system comprising an image sensor for
photoelectric conversion, the optical imaging system further
comprising: a first lens group having a positive refractive power
closest to a subject; a second lens group closest to the first lens
group and having a negative refractive power; a third lens group
having one of a positive or negative power; and a fourth lens group
having one of a positive or negative power, wherein each of the
first to fourth lens groups comprises an aspheric lens having at
least one aspheric surface thereof; and one of a thin film filter
or an optical filter for restricting the transmission of a portion
of light between the second and third lens groups or between the
third and fourth lens groups..].
.[.2. An optical imaging system according to claim 1, wherein the
first lens group comprises at least one lens of a positive
refractive power..].
.[.3. An optical imaging system according to claim 1, wherein the
second lens group comprises at least one lens of a negative
refractive power..].
.[.4. An optical imaging system according to claim 1, wherein the
third lens group comprises at least one lens of a positive or
negative refractive power..].
.[.5. An optical imaging system according to claim 1, wherein a
fourth lens group comprises at least one lens of a positive or
negative refractive power..].
.[.6. An optical imaging system according to claim 1, wherein the
optical imaging system satisfies << ##EQU00010## wherein f
denotes synthetic focus distance of the optical imaging system and
f.sub.1 denotes focus distance of the first lens group..].
.[.7. An optical imaging system according to claim 1, wherein the
optical imaging system satisfies << ##EQU00011## wherein f
denotes a synthetic focus distance of the optical imaging system
and f.sub.2 denotes a focus distance of the second lens
group..].
.[.8. An optical imaging system according to claim 1, wherein the
optical imaging system satisfies <<.infin. ##EQU00012##
wherein f denotes a synthetic focus distance of the optical imaging
system and f.sub.3 denotes a focus distance of the third lens
group..].
.[.9. An optical imaging system according to claim 1, wherein the
optical imaging system satisfies <<.infin. ##EQU00013##
wherein f denotes a synthetic focus distance of the optical imaging
system and f.sub.4 denotes a focus distance of the second lens
group..].
.[.10. An optical imaging system comprising an image sensor for
photoelectric conversion, the optical imaging system further
comprising: a first lens group having a positive refractive power;
a second lens group having a negative refractive power; a third
lens group having one of a positive or negative power; and a fourth
lens group having one of a positive or negative power, wherein the
optical imaging system satisfies << ##EQU00014## wherein f
denotes a synthetic focus distance of die optical imaging system
and TTL denotes a distance from an iris surface to an imaging
surface; wherein a lens located in the first lens group and having
at least one aspheric surface; and one of a thin film filter or an
optical filter for restricting the transmission of a portion of
light between the second and third lens groups or between the third
and fourth lens groups..].
.[.11. An optical imaging system according to claim 10, further
comprising a parallel flat glass disposed between the image sensor
and the fourth lens group..].
.[.12. An optical imaging system comprising an image sensor for
photoelectric conversion, the optical imaging system further
comprising: a first lens group having a positive refractive power;
a second lens group having a negative refractive power; a third
lens group having one of a positive or negative power; and a fourth
lens group having one of a positive or negative power, wherein the
first and second lens groups satisfy an optical axis direction size
according to << ##EQU00015## wherein d.sub.1 denotes a
separated distance between the first lens group and the second lens
group on the optical axis and TTL denotes a distance from an iris
surface to an imaging surface; wherein a lens located in the first
lens group and having at least one aspheric surface; and one of a
thin film filter or an optical filter for restricting the
transmission of a portion of light between the second and third
lens groups or between the third and fourth lens groups..].
.[.13. An optical imaging system according to claim 12, further
comprising a parallel flat glass disposed between the image sensor
and the fourth lens group..].
.[.14. An optical imaging system comprising an image sensor for
photoelectric conversion, the optical imaging system further
comprising: a first lens group having a positive refractive power;
a second lens group having a negative refractive power; a third
lens group having one of a positive or negative power; and a fourth
lens group having one of a positive or negative power, wherein the
third and fourth lens groups satisfy an optical axis direction size
according to << ##EQU00016## wherein d.sub.3 denotes a
separated distance between the third lens group and the fourth lens
group on the optical axis and TIL denotes a distance from an iris
surface to an imaging surface; wherein a lens located in the first
lens group and having at least one aspheric surface; and one of a
thin film filter or an optical filter for restricting the
transmission of a portion of light between the second and third
lens groups or between the third and fourth lens groups..].
.[.15. An optical imaging system according to claim 14, further
comprising a parallel flat glass disposed between the image sensor
and the fourth lens group..].
.[.16. An optical imaging system comprising an image sensor for
photoelectric conversion, the optical imaging system further
comprising: a first lens group having a positive refractive power
closest to a subject; a second lens group closest to the first lens
group and having a negative refractive power; a third lens group
having one of a positive or negative power; and a fourth lens group
having one of a positive or negative power, wherein each of the
first to fourth lens groups comprises an aspheric lens having at
least one aspheric surface thereof, and wherein the Abbe's numbers
of the first and second lens groups G1 and G2 satisfy
28.2<.upsilon.1-.upsilon.2<42.8, wherein .upsilon..sub.1 and
.upsilon..sub.2 denote Abbe's numbers representing the distribution
characteristics of the first and second lens groups
respectively..].
.Iadd.17. An optical imaging system for pickup comprising, in order
from object side to image side: a first lens with a positive
refractive power having an object side surface with a positive
curvature; a second lens with a negative refractive power having an
object side surface with a negative curvature and an image side
surface with a positive curvature; a third lens with a refractive
power having an object side surface with negative curvature and an
image side surface with negative curvature; and a fourth lens with
a negative refractive power; wherein each of the first lens, the
second lens, the third lens, the fourth lens is an aspheric lens
having at least one aspheric surface thereof, wherein an Abbe
number of the first lens is v1, an Abbe number of the second lens
is v2, and the following condition is satisfied:
28.2<v1-v2<42.8..Iaddend.
.Iadd.18. The optical imaging system of claim 17, wherein the first
lens comprises an image side surface with a negative or positive
curvature..Iaddend.
.Iadd.19. The optical imaging system of claim 17, wherein the first
lens and the second lens contact each other..Iaddend.
.Iadd.20. The optical imaging system of claim 17, wherein the third
lens is a lens with a positive refractive power..Iaddend.
.Iadd.21. The optical imaging system of claim 17, wherein an object
side surface and an image side surface of the fourth lens are
aspheric..Iaddend.
.Iadd.22. The optical imaging system of claim 17, wherein the
fourth lens comprises an object side surface with a negative
curvature and an image side surface with a positive
curvature..Iaddend.
.Iadd.23. The optical imaging system of claim 22, wherein a sign of
the curvature of at least one of the object side surface or the
image side surface of the fourth lens is changed from an optical
axis towards an edge of the fourth lens..Iaddend.
.Iadd.24. The optical imaging system of claim 17, wherein the
optical imaging system satisfies the following equation:
0.45<f/TTL<1.01, wherein f denotes a total focal length of
the optical imaging system and TTL denotes a distance from an iris
to an imaging surface..Iaddend.
.Iadd.25. The optical imaging system of claim 17, wherein the
optical imaging system satisfies the following equations:
0.3<f1/f<3.1 0.3<|f2|/f<8.99, wherein f denotes a total
focal length of the optical imaging system, f1 denotes a focal
length of the first lens, and f2 denotes a focal length of the
second lens..Iaddend.
.Iadd.26. The optical imaging system of claim 17, wherein the
optical imaging system satisfies the following equations:
0.19<|f3|/f<.infin. 0.15<|f4|/f<.infin., wherein f
denotes a total focal length of the optical imaging system, f3
denotes a focal length of the third lens, and f4 denotes a focal
length of the fourth lens..Iaddend.
.Iadd.27. The optical imaging system of claim 17, wherein an iris
is disposed at an object side of the first lens..Iaddend.
.Iadd.28. The optical imaging system of claim 17, wherein the
optical imaging system satisfies the following equation:
0<d1/TTL<0.26, wherein d1 denotes a separated distance
between the first lens and the second lens on the optical axis and
TTL denotes a distance from an iris to an imaging
surface..Iaddend.
.Iadd.29. The optical imaging system of claim 17, wherein the
optical imaging system satisfies the following equation:
0<d3/TTL<0.40, wherein d3 denotes a separated distance
between the third lens and the fourth lens on the optical axis and
TTL denotes a distance from an iris to an imaging
surface..Iaddend.
.Iadd.30. An optical imaging system for pickup comprising, in order
from object side to image side: a first lens with a positive
refractive power; a second lens with a negative refractive power
having an object side surface with a negative curvature and an
image side surface with a positive curvature; a third lens with a
refractive power; and a fourth lens with a negative refractive
power; wherein each of the first lens, the second lens, the third
lens, the fourth lens is an aspheric lens having at least one
aspheric surface thereof, wherein an Abbe number of the first lens
is v1, an Abbe number of the second lens is v2, and the following
condition is satisfied: 28.2<v1-v2<42.8. .Iaddend.
.Iadd.31. The optical imaging system of claim 30, wherein the first
lens comprises an object side surface with a positive curvature and
an image side surface with a negative curvature..Iaddend.
.Iadd.32. The optical imaging system of claim 30, wherein the third
lens is a lens with a positive refractive power..Iaddend.
.Iadd.33. The optical imaging system of claim 30, wherein the third
lens comprises an object side surface with a negative curvature and
an image side surface with a negative curvature..Iaddend.
.Iadd.34. The optical imaging system of claim 30, wherein the
fourth lens comprises an object side surface with a negative
curvature and an image side surface with a positive
curvature..Iaddend.
.Iadd.35. The optical imaging system of claim 34, wherein a sign of
the curvature of at least one of the object side surface or the
image side surface of the fourth lens is changed from an optical
axis towards an edge of the fourth lens..Iaddend.
.Iadd.36. The optical imaging system of claim 30, wherein an object
side surface and an image side surface of the fourth lens are
aspheric..Iaddend.
Description
BACKGROUND .[.OF THE INVENTION.].
1. Field of the Invention
The present invention generally relates to an optical system, and
more particularly to an optical system including multiple lens
groups having a reduced volume.
2. Description of the Related Art
An optical imaging system includes imaging elements such as CCD
imaging elements (charged coupled devices) or CMOS imaging elements
(complimentary metal oxide semiconductors) and at least one lens
group for use in various types of consumer products such as digital
and monitoring cameras, personal computers, and the like.
The lens group typically includes at least one lens having
undesirable aberration characteristics. These undesirable
aberration characteristics are intrinsic to the lens and are
generated due to the shape of the lens. The aberration
characteristics can cause distortion of images in certain
circumstances. Among the different type of aberrations, the
spherical and coma aberrations, in particular, cannot be easily
corrected and can cause image flares and other undesirable visual
effects.
In order to solve problems caused by such lens aberrations, it has
been previously proposed in the prior art to utilize a lens group
including an aspheric lens for correcting the aberrations, or a
thin film filter or an optical filter having a sharp surface which
can restrict a portion of the light.
Further, recent developments in image devices for miniaturization
and portability, for use in miniaturized optical imaging systems
require mounting in the image devices.
Therefore, it would be desirable to have an improved optical
imaging system that is miniaturized and whose optical
characteristics exhibit minimal deterioration over time.
SUMMARY .[.OF THE INVENTION.].
Accordingly, the present invention has been made in view of the
above-mentioned problems involved with the related art by providing
an optical imaging system having a reduced volume and whose optical
characteristics exhibit minimal deterioration over time.
One aspect of the present invention is to provide an optical
imaging system including: a first lens group having a positive
refractive power; a second lens group having a negative refractive
power; a third lens group having a positive or negative power; and
a fourth lens group having a positive or negative power.
BRIEF DESCRIPTION OF THE DRAWINGS
FIGS. 1 to 14 are views illustrating optical imaging systems
according to particular embodiments of the present invention.
DETAILED DESCRIPTION
Hereinafter, embodiments of the present invention will be described
with reference to the accompanying drawings. In the following
description of the present invention, a detailed description of
known functions and configurations incorporated herein is omitted
to avoid making the subject matter of the present invention
unclear.
FIG. 1 is a view for illustrating an optical system according to
one embodiment of the present invention. Referring to FIG. 1, an
optical imaging system 10, according to the present embodiment
includes an image sensor S capable of photoelectric conversion, a
first lens group G1, closest to a subject and having a positive
refractive power, a second lens group G2 having a negative
refractive power, a third lens group G3 having a positive or
negative refractive power, and a fourth lens group G4 having a
positive or negative refractive power. The image sensor S is
preferably embodied as a CCD or a CMOS imaging element, or the
like.
Each of the first to fourth lens groups G1 to G4 can include an
aspheric lens on at least one surface thereof. The fourth lens
group G4 is located adjacently to the image sensor S, and a
parallel flat glass LP can be disposed between the fourth lens
group G4 and the image sensor S. The parallel flat glass LP is a
thin film filter or an optical filter, and can function as an
infrared absorption filter and the like.
The following formulas (1) to (5) illustrate the relationship
between the .[.focus distances.]. .Iadd.focal lengths .Iaddend.of
the various lens groups G1 to G4 and the .[.focus distance.].
.Iadd.focal length .Iaddend.of the optical imaging system 10.
The first lens group G1 includes at least one lens of a positive
refractive power, and the optical imaging system 10 satisfies
formula (1).
<< ##EQU00001##
In formula (1), f denotes the .[.synthetic focus distance.].
.Iadd.total focal length .Iaddend.of the optical imaging system and
f.sub.1 denotes the .[.focus distance.]. .Iadd.focal length
.Iaddend.of the first lens group.
The second lens group G2 includes at least one lens of a negative
refractive power, and its .[.focus distance.]. .Iadd.focal length
.Iaddend.satisfies formula (2).
<< ##EQU00002##
In formula (2), f denotes the .[.synthetic focus distance.].
.Iadd.total focal length .Iaddend.of the optical imaging system and
f.sub.2 denotes the .[.focus distance.]. .Iadd.focal length
.Iaddend.of the second lens group.
The third lens group G3 includes at least one lens of a positive or
negative refractive power, and its .[.focus distance.]. .Iadd.focal
length .Iaddend.can be set according to formula (3).
<<.infin. ##EQU00003##
In formula (3), f denotes the .[.synthetic focus distance.].
.Iadd.total focal length .Iaddend.of the optical imaging system and
f.sub.3 denotes the .[.focus distance.]. .Iadd.focal length
.Iaddend.of the third lens group.
The fourth lens group G4 includes at least one lens of a positive
or negative refractive power, and its .[.focus distance.].
.Iadd.focal length .Iaddend.can be set according to formula
(4).
<<.infin. ##EQU00004##
In formula (4), f denotes the .[.synthetic focus distance.].
.Iadd.total focal length .Iaddend.of the optical imaging system and
f.sub.4 denotes the .[.focus distance.]. .Iadd.focal length
.Iaddend.of the second lens group.
The optical imaging system 10 satisfies formula (5).
<< ##EQU00005##
In formula (5), f denotes the .[.synthetic focus distance.].
.Iadd.total focal length .Iaddend.of the optical imaging system and
TTL denotes the distance from an iris surface to an imaging
surface.
The optical imaging system 10 satisfies formula (6). The first and
second lens groups G1 and G2 satisfy the optical axis direction
size according to formula (6).
<< ##EQU00006##
In formula (6), d.sub.1 denotes a separated distance between the
first lens group and the second lens group on the optical axis.
The third and fourth lens groups G3 and G4 satisfy the optical axis
direction size according to formula (7).
<< ##EQU00007##
In formula (7), d.sub.3 denotes a separated distance between the
third lens group and the fourth lens group on the optical axis.
The Abbe's numbers of the first and second lens groups G1 and G2
satisfy formula (8).
<.upsilon..times..times..upsilon..times..times.<
##EQU00008##
In formula (8), .upsilon..sub.1 and .upsilon..sub.2 denote Abbe's
numbers representing the .[.distribution.]. .Iadd.dispersion
.Iaddend.characteristics of the first and second lens groups
respectively.
The aspheric definition equation can be defined by formula (9)
below.
.times..times..times. ##EQU00009##
In formula (9), x denotes the distance along the optical axis from
the apex of the optical surface, y denotes the distance in the
direction perpendicular to the optical axis, c denotes the
curvature at the apex of the optical surface .Iadd.(the inverse of
a curvature radius, c=1/r), .Iaddend.K denotes the conic
coefficient, and A, B, C, D and E denote the aspheric
coefficients.
The following Tables 1 to 3 represent the curvatures at the lens
surfaces, the distances between the lenses, and the thicknesses of
the lenses of the optical imaging systems according to embodiments
of the present invention.
The distances indicated in the aperture rows represent the distance
from the stops in each embodiment to the first lens group or the
incidence surface of the first lens. Further, the distances of the
.[.subject rows.]. .Iadd.objects .Iaddend.are the distances from
the .[.subjects.]. .Iadd.objects .Iaddend.to the optical systems of
the corresponding embodiments, and approach infinity in the
curvature.
Further, the curvatures of the surfaces indicated in respective
rows of Tables 1 to 3 represent the curvatures at the apices of the
optical surfaces. In Tables 1 to 3, the second and third surfaces
correspond to the surfaces of both the first lens of the first lens
group, and the fourth and the fifth surfaces of the second lens.
The sixth and seventh surfaces correspond to the third lens, and
the eighth and ninth surfaces correspond to the fourth lens. The
tenth and eleventh surfaces correspond to both surfaces of the thin
film filter or the optical filter, and the .[.upper.]. .Iadd.image
.Iaddend.surface corresponds to the sensor.
TABLE-US-00001 TABLE 1 Embodiment 1 Embodiment 2 Embodiment 3
Embodiment 4 Embodiment 5 Curvature Curvature Curvature Curvature
Curvature radius radius radius radius radius (r) Distance (r)
Distance (r) Distance (r) Distance (r) Distance Object .infin.
.infin. .infin. .infin. .infin. .infin. .infin. .infin. .in- fin.
.infin. Stop .infin. 0.097 .infin. 0.158 .infin. 0.118 .infin.
0.030 .infin. 0.059- 4 2;R1 2.308 1.17 1.90143 1.174 3.27233 1.100
2.31076 1.066 2.9744 1.500 3;R2 -6.369 0.14 -1.20746 0.050 4.67332
0.103 -7.4386 0.10 -8.7847 0.4669 4;R3 -396.532 0.5357 -1.74939
0.363658 3.28408 0.671321 13.09940 0.300 19.- 62274 0.6000 5;R4
3.85393 0.8800640 4.33678 0.626369 2.76273 0.32772 3.44803 0.74667
3.- 68254 1.020392 6;R5 -2.8102 0.801423 -2.16510 1.200 -9.54821
0.900 -2.37523 0.797763 49.3- 243 1.500 7;R6 -1.30844 0.108171
-1.54462 0.959357 -1.66438 0.035965 -1.17766 0.0611- 59 -0.6061
0.3000 8;R7 2.78412 0.798390 22.78452 0.643246 2.38024 0.750438
2.7701 0.813576 -- 0.9404 0.8410 9;R8 1.10058 0.6 2.80755 0.300
1.31748 1.200 1.10025 0.420 1.3115 0.5333 10.sup.th .infin. 0.3
.infin. 0.300 .infin. 0.345836 .infin. 0.300 .infin.- 0.400 surface
11.sup.th .infin. 0.594705 .infin. 0.78896 .infin. 1.808969 .infin.
0.729 - .infin. 0.552 surface Image .infin. -0.004867 .infin.
0.060517 .infin. -0.024762 .infin. -0.0019- 79 .infin. -0.0229
surface
TABLE-US-00002 TABLE 2 Embodiment 6 Embodiment 7 Embodiment 8
Embodiment 9 Embodiment 10 Curvature Curvature Curvature Curvature
Curvature radius radius radius radius radius (r) Distance (r)
Distance (r) Distance (r) Distance (r) Distance Object .infin.
.infin. .infin. .infin. .infin. .infin. .infin. .infin. .in- fin.
.infin. Stop .infin. 0.6476 .infin. 0.3463 .infin. 0.4555 .infin.
0.030 .infin. 0.- 112 2.sup.nd surface 3.13902 1.4131 2.66332
1.5000 3.25081 0.8732 2.68778 1.15- 1 2.32028 1.0409 3.sup.rd
surface -3.0951 0.1000 -3.9930 0.1323 -3.4043 0.1458 -6.9943 0.10-
0 -6.2290 0.000 4.sup.th surface -3.2023 0.3000 -5.3522 0.6000
-2.6909 0.3000 -12.169 0.35- 9 -40.0905 0.600 5.sup.th surface
-17.430 2.1265 8.06170 1.0825 17.0230 0.1621 8.28938 2.26- 8
4.30201 0.758760 6.sup.th surface -2.5800 0.8000 -1.9343 0.8000
-13.170 1.9366 -3.1380 0.95- 8 -2.3804 0.800 7.sup.th surface
-2.9025 0.0300 -1.6944 0.0300 -1.0714 0.0300 -2.2201 0.57- 1
-1.18271 0.050 8.sup.th surface 1.6766 1.0510 1.43882 0.8278
2.07137 0.5406 -46.094 0.439- 512 2.97821 0.759082 9.sup.th surface
1.280758 0.6575 1.13450 0.5683 1.00140 0.7500 3.15688 0.6- 35425
1.14396 0.60000 10.sup.th .infin. 0.3999 .infin. 0.3384 .infin.
0.3999 .infin. 0.400 .infi- n. 0.300 surface 11.sup.th .infin.
0.5012 .infin. 1.0033 .infin. 0.3940 .infin. 1.087873 .i- nfin.
1.15 surface Image .infin. -0.001 .infin. -0.0033 .infin. 0.0115
.infin. -0.0026 .infin- . +0.001717 surface
TABLE-US-00003 TABLE 3 Embodiment 11 Embodiment 12 Embodiment 13
Embodiment 14 Curvature Curvature Curvature Curvature radius radius
radius radius (r) Distance (r) Distance (r) Distance (r) Distance
Object .infin. .infin. .infin. .infin. .infin. .infin. .infin.
.infin. Stop .infin. 0.122343 .infin. 0.172863 .infin. 0.0300
.infin. 0.480264 2nd surface 3.87998 0.490300 2.31854 1.219838
4.41591 0.81255 3.01153 1.10- 000 3rd surface -20.7340 2.001108
-6.32101 0.159417 -5.0714 0.1000 -3.45345 0.- 10000 4th surface
7.75795 0.300000 -302.670 0.427352 -4.568 0.3000 -3.57593 0.50- 000
5th surface 3.60180 0.672147 3.93461 0.742239 17.81786 0.55615
-25.0277 2.- 23581 6th surface -5.48009 1.123412 -2.26332 0.80000
-10.2402 0.8000 -2.62654 0.- 54408 7th surface -1.75190 0.03000
-1.16737 0.000 -3.2556 2.9643 -2.8477 0.08336- 8th surface 4.24622
1.243467 2.65978 0.796021 6.79551 0.7000 1.58235 0.889- 66 9th
surface 1.69995 0.53333 1.10575 0.70000 2.49781 0.4000 1.22608
0.63848- 10th .infin. 0.399997 .infin. 0.3000 .infin. 0.4000
.infin. 0.39999 surface 11th .infin. 0.85132 .infin. 0.69052
.infin. 0.3855 .infin. 0.60000 surface Image .infin. -0.0126
.infin. 0.005756 .infin. -0.0054 .infin. -0.00001 surface
Embodiment 1
The aspheric surfaces of the lenses constituting the optical
imaging system according to the first embodiment are as presented
in Table 4. The spherical surfaces and other conditions are as
indicated in Table 1. The aspheric surfaces can be determined
according to formula (9). The optical imaging system 10 according
to the first embodiment includes a first lens group G1 having a
positive refractive power, a second lens group G2 having a negative
refractive power, a third lens group G3 having a positive or
negative refractive power, a fourth lens group G4 having a positive
or negative refractive power, a stop, and a thin film filter or an
optical filter.
The stop is located on the incidence side of the optical imaging
system 10, and the .[.introduced.]. .Iadd.incident .Iaddend.light
is output to the first lens group G1. The stop is used to regulate
the amount of the light introduced into the optical imaging system
10, and is separated from the first lens group G1 by 0.097005
mm.
The first lens group G1 includes a first lens L1 which outputs the
light .[.introduced.]. .Iadd.incident .Iaddend.through the stop to
the second lens group G2. The first lens L1 includes second and
third surfaces R1 and R2 which are aspheric, formed of a material
having a refractive index of 1.529960 and a .[.distribution
value.]. .Iadd.dispersion constant .Iaddend.of 55.8. The thickness
of the first lens L1 is 1.170132 mm. Note that the first surface
designates the .[.irisi.]. .Iadd.stop.Iaddend..
The second lens group G2 includes a second lens L2 having a
refractive index of 1.7552 and a .[.distribution value.].
.Iadd.dispersion constant .Iaddend.of 27.53. The second lens L2 has
fourth and fifth surfaces R3 and R4 which are aspheric. Referring
to Table 1, the second lens group G2 is separated from the first
lens L1 by 0.14 mm, and the center of the curvature is located on
the optical axis.
The third lens group G3 includes a third lens L3. Both surfaces R5
and R6 of the third lens L3 are aspheric. The third lens L3 is
separated from the second lens L2 by 0.088064 mm, and has a
thickness of 0.801423 mm. The third lens L3 is formed of a material
having a refractive index of 1.52996 and a .[.distribution value.].
.Iadd.dispersion constant .Iaddend.of 55.8.
The fourth lens group G4 includes a fourth lens L4. Both surfaces
R7 and R8 of the fourth lens L4 are aspheric. The fourth lens L4 is
formed of a material having a refractive index of 1.52996 and a
.[.distribution value.]. .Iadd.dispersion constant .Iaddend.of
55.8. The thin film filter or the optical filter LP is formed on
one surface of a BSC7-HOYA substrate by optical thin film
deposition, and outputs partially restricted light through the
fourth lens L4. The thin film filter or the optical filter LP is
separated from the fourth lens L4 by 0.6 mm, and the thickness
thereof is 0.3 mm.
TABLE-US-00004 TABLE 4 K A B C D E 2(R1) -0.293462 -0.500119E-02
0.174440E-01 -0.454965E-01 0.46924E-01 -0.195854E-01 3(R2)
-9.260888 -0.800894E-02 -0.853100E-02 -0.490518E-02 -0.122591E-02-
0.122831E-03 4(R3) 106224.0635 -0.120921E-01 -0.705929E-02
-0.207145E-02 -0.161995E-03 -0.210957E-03 5(R4) 0.365689
0.749905E-03 0.131150E-02 0.778014E-04 -0.121719E-03 0.572661E-03
6(R5) -24.431171 -0.672890E-01 0.18948E-01 0.961734E-02
-0.435003E-02 0.806518E-03 7(R6) -2.571360 -0.335648E-01
-0.109854E-01 0.181423E-01 -0.489429E-02 0.747733E-03 8(R7)
-17.862211 -0.795409E-01 0.310568E-01 -0.553846E-02 0.730076E-04
0.544935E-04 9(R8) -4.629831 -0.533642E-01 0.17364E-01
-0.392400E-02 0.440467E-03 -0.212501E-04
Embodiment 2
The optical imaging system 20 according to the second embodiment
includes a first lens group G1 having a positive refractive power,
a second lens group G2 having a negative refractive power, a third
lens group G3 having a positive or negative refractive power, a
fourth lens group G4 having a positive or negative refractive
power, a stop, and a thin film filter or an optical filter
(LP).
The first lens group G1 includes a first lens L1, both surfaces R1
and R2 of which are aspheric. The thickness of the first lens L1 is
1.174399 mm. The first lens L1 is separated from the stop by
0.158423 mm.
The second lens group G2 includes a second lens L2 having a
refractive index of 1.7552 and a .[.distribution value.].
.Iadd.dispersion constant .Iaddend.of 27.53, and the second lens L2
has fourth and fifth surfaces R3 and R4 which are aspheric.
Referring to Table 1, the second lens L2 is separated from the
first lens L1 by 0.05 mm, and has a thickness of 0.363658 mm.
The third lens group G3 includes a third lens L3. Both surfaces R5
and R6 of the third lens L3 are aspheric. The third lens L3 is
separated from the second lens L2 by 0.626369 mm, and has a
thickness of 1.200 mm. The third lens L3 is formed of a material
having a refractive index of 1.52996 and a .[.distribution value.].
.Iadd.dispersion constant .Iaddend.of 55.8.
The fourth lens group G4 includes a fourth lens L4. Both surfaces
R7 and R8 of the fourth lens L4 are aspheric. The fourth lens L4 is
formed of a material having a refractive index of 1.52996 and a
.[.distribution value.]. .Iadd.dispersion constant .Iaddend.of
55.8. The thin film filter or the optical filter LP is formed on
one surface of a BSC7-HOYA substrate by optical thin film
deposition, and outputs partially restricted light through the
fourth lens L4. The thin film filter or the optical filter LP is
separated from the fourth lens L4 by 0.3 mm.
The aspheric specifications of the first to fourth lenses according
to the second embodiment can be calculated as shown in Table 5
according to formula (9).
TABLE-US-00005 TABLE 5 K A B C D E 2(R1) -0.257713 -0.515708E-02
0.209747E-01 -0.505970E-01 0.447308E-01 -0.188477E-01 3(R2)
-18.708087 -0.1032054E-01 -0.105518E-01 -0.865314E-02 -0.272928E-
-02 0.123342E-03 4(R3) -43.346401 -0.181606E-01 -0.384568E-02
0.397337E-03 -0.676785E-03 -0.185398E-02 5(R4) -0.927369
-0.184534E-02 0.328550E-01 0.145702E-01 -0.330705E-02 0.451156E-03
6(R5) 1.000662 -0.114554E+00 0.213009E-01 0.28671E-01 0.193745E-02
-0.723361E-02 7(R6) -1.421093 -0.372122E-01 -0.953273E-02
0.172586E-01 -0.507483E-02 0.456643E-03 8(R7) -2680755.274
-0.776437E-01 0.326426E-01 -0.516378E-02 0.139662E-03 0.354080E-05
9(R8) -8.098312 -0.608029E-01 0.173038E-01 -0.354982E-02
0.459123E-03 -0.308217E-04
Embodiment 3
The optical imaging system 30 according to the third embodiment
includes a first lens group G1 having a positive refractive power,
a second lens group G2 having a negative refractive power, a third
lens group G3 having a positive or negative refractive power, a
fourth lens group G4 having a positive or negative refractive
power, a stop, and a thin film filter or an optical filter.
The first lens group G1 includes a first lens L1, both surfaces R1
and R2 of which are aspheric. Referring to Table 1, the thickness
of the first lens L1 is 1.10000 mm. The first lens L1 is separated
from the stop by .[.0.18539.]. .Iadd.0.118 .Iaddend.mm.
The second lens group G2 includes a second lens L2 having a
refractive index of 1.7552 and a .[.distribution value.].
.Iadd.dispersion constant .Iaddend.of 27.53. The second lens L2 has
fourth and fifth surfaces R3 and R4 which are aspheric. Referring
to Table 1, the second lens L2 is separated from the first lens L1
by 0.103084 mm, and the thickness thereof is 0.671321 mm.
The third lens group G3 includes a third lens L3. Both surfaces R5
and R6 of the third lens L3 are aspheric. The third lens L3 is
separated from the second lens L2 by 0.327722 mm, and has a
thickness of 0.9 mm. The third lens L3 is formed of a material
having a refractive index of 1.48749 and a .[.distribution value.].
.Iadd.dispersion constant .Iaddend.of 70.4058.
The fourth lens group G4 includes a fourth lens L4. Both surfaces
R7 and R8 of the fourth lens L4 are aspheric. The fourth lens L4 is
formed of a material having a refractive index of 1.516799 and a
.[.distribution value.]. .Iadd.dispersion constant .Iaddend.of
56.3954. The thin film filter or the optical filter LP is formed on
one surface of a BSC7-HOYA substrate by optical thin film
deposition, and outputs partially restricted light through the
fourth lens L4. The thin film filter or the optical filter LP is
separated from the fourth lens L4 by 1.2 mm.
The aspheric specifications of the first to fourth lenses according
to the third embodiment can be calculated as shown in Table 6
according to formula (9).
TABLE-US-00006 TABLE 6 K A B C D E 2(R1) -1.835982 -0.540163E-02
0.375499E-02 -0.142352E-01 0.131732E-01 -0.519886E-02 3(R2)
-41.048843 -0.229191E-02 -0.938832E-02 0.209185E-02 0.433396E-02
-0.111937E-02 4(R3) -11.973390 -0.112168E-01 -0.268986E-02
-0.187660E-03 0.394245E-03 -0.289163E-03 5(R4) -1.905279
-0.658295E-02 0.186594E-03 -0.748272E-03 -0.467662E-03 0.229792E-04
6(R5) -276.330987 -0.708063E-2 0.914221E-02 0.288806E-02
-0.131006E-02 -0.158700E-03 7(R6) -3.139053 -0.110843E-01
-0.336114E-02 0.786618E-02 -0.901802E-03 0.284397E-03 8(R7)
-1.570846 -0.495767E-01 0.157197E-01 -0.238177E-02 0.155217E-04
0.480583E-04 9(R8) -3.484978 -0.155739E-01 0.599301E-01
-0.140844E-02 0.125464E-03 0.154242E-04
Embodiment 4
The optical imaging system 40 according to the fourth embodiment
includes a first lens group G1 having a positive refractive power,
a second lens group G2 having a negative refractive power, a third
lens group G3 having a positive or negative refractive power, a
fourth lens group G4 having a positive or negative refractive
power, a stop, and a thin film filter or an optical filter.
The first lens group G1 includes a first lens L1, both surfaces R1
and R2 of which are aspheric. Referring to Table 1, the thickness
of the first lens L1 is .[.1.16687.]. .Iadd.1.066 .Iaddend.mm. The
first lens L1 is separated from the stop by 0.03 mm. The first lens
L1 is formed of a material having a refractive index of 1.531449
and a .[.distribution value.]. .Iadd.dispersion constant
.Iaddend.of 66.1381.
The second lens group G2 includes a second lens L2 having a
refractive index of 1.671174 and a .[.distribution value.].
.Iadd.dispersion constant .Iaddend.of 32.0197. The fourth and fifth
surfaces R3 and R4 of the second lens L2 are spherical. Referring
to Table 1, the second lens L2 is separated from the first lens L1
by 0.102841 mm, and the thickness thereof is 0.3 mm.
The third lens group G3 includes a third lens L3. Both surfaces R5
and R6 of the third lens L3 are aspheric. The third lens L3 is
separated from the second lens L2 by 0.746673 mm, and has a
thickness of .[.0.9.]. .Iadd.0.797763 .Iaddend.mm. The third lens
L3 is formed of a material having a refractive index of 1.532928
and a .[.distribution value.]. .Iadd.dispersion constant
.Iaddend.of 66.015.
The fourth lens group G4 includes a fourth lens L4. Eighth and
ninth surfaces R7 and R8 of the fourth lens L4 are aspheric. The
fourth lens L4 is formed of a material having a refractive index of
1.545534 and a .[.distribution value.]. .Iadd.dispersion constant
.Iaddend.of 65.0098. The thin film filter or the optical filter LP
is formed on one surface of a BSC7-HOYA substrate by optical thin
film deposition, and outputs partially restricted light through the
fourth lens L4. The thin film filter or the optical filter LP is
separated from the fourth lens L4 by 0.420622 mm.
The aspheric specifications of the first, third, and fourth lenses
according to the fourth embodiment can be calculated as shown in
Table 7 according to formula (9).
TABLE-US-00007 TABLE 7 K A B C D E 2(R1) -0.414786 -0.681554E-02
0.202808E-01 -0.458051E-01 0.486110E-01 -0.192443E-01 3(R2)
-47.977483 0.753038E-03 -0.494574E-03 -0.938500E-03 -0.477371E-03
0.427775E-03 4(R3) 5(R4) 6(R5) -15.896356 -0.668718E-1 0.195572E-01
0.949661E-02 -0.450552E-02 0.799452E-03 7(R6) -2.447435
-0.355564E-01 -0.106736E-01 0.187415E-01 -0.453123E-02 0.913004E-03
8(R7) -13.319650 -0.816238E-01 0.306218E-01 -0.557765E-02
0.732077E-04 0.574664E-04 9(R8) -4.692781 -0.568388E-01
0.179127E-01 -0.392127E-02 0.437571E-03 -0.21894E-04
Embodiment 5
The optical imaging system 50 according to the fifth embodiment
includes a first lens group G1 having a positive refractive power,
a second lens group G2 having a negative refractive power, a third
lens group G3 having a positive or negative refractive power, a
fourth lens group G4 having a positive or negative refractive
power, a stop, and a thin film filter or an optical filter.
The first lens group G1 includes a first lens L1 in which both
surfaces R1 and R2 are aspheric. Referring to Table 1, the
thickness of the first lens L1 is 1.5 mm. The first lens L1 is
separated from the stop by 0.059478 mm. The first lens L1 is formed
of a material having a refractive index of 1.533230 and a
.[.distribution value.]. .Iadd.dispersion constant .Iaddend.of
65.9899.
The second lens group G2 includes a second lens L2 having a
refractive index of 1.755201 and a .[.distribution value.].
.Iadd.dispersion constant .Iaddend.of 27.5795. The fourth and fifth
surfaces R3 and R4 of the second lens L2 are spherical. Referring
to Table 1, the second lens L2 is separated from the first lens L1
by 0.466939 mm, and the thickness thereof is 0.6 mm.
The third lens group G3 includes a third lens L3. The third lens L3
includes sixth and seventh surfaces R5 and R6 which are aspheric.
The third lens L3 is separated from the second lens L2 by 1.020392
mm, and has a thickness of 1.5 mm. The third lens L3 is formed of a
material having a refractive index of 1.526846 and a
.[.distribution value.]. .Iadd.dispersion constant .Iaddend.of
53.030473.
The fourth lens group G4 includes a fourth lens L4. The fourth lens
L4 includes eighth and ninth surfaces R7 and R8 which are aspheric.
The fourth lens L4 is formed of a material having a refractive
index of 1.537416 and a .[.distribution value.]. .Iadd.dispersion
constant .Iaddend.of 50.1447. The thin film filter or the optical
filter LP is formed on one surface of a BSC7-HOYA substrate by
optical thin film deposition, and outputs partially restricted
light through the fourth lens L4. The thin film filter or the
optical filter LP is separated from the fourth lens L4 by 0.533392
mm.
The aspheric specifications of the first, third, and fourth lenses
according to the fifth embodiment can be calculated as shown in
Table 8 according to formula (9).
TABLE-US-00008 TABLE 8 K A B C D E 2(R1) -0.394400 -0.272171E-02
0.416066E-02 -0.607051E-02 0.380128E-02 -0.863417E-03 3(R2)
-24.090048 -0.412473E-03 0.555552E-03 -0.275809E-03 -0.176666E-03
0.988739E-04 4(R3) 5(R4) 6(R5) 276.291590 -0.271502E-1 0.329418E-02
0.106440E-02 -0.323744E-03 0.428169E-04 7(R6) -3.116597
-0.205921E-01 -0.130529E-02 0.278790E-02 -0.318606E-03 0.358108E-04
8(R7) -6.168567 -0.189375E-01 0.732132E-02 -0.780195E-03
0.685421E-05 0.328986E-05 9(R8) -15.211827 -0.200112E-01
0.342095E-02 -0.566744E-03 0.330318E-04 -0.670599E-06
Embodiment 6
The optical imaging system 60 according to the sixth embodiment
includes a first lens group G1 having a positive refractive power,
a second lens group G2 having a negative refractive power, a third
lens group G3 having a positive or negative refractive power, a
fourth lens group G4 having a positive or negative refractive
power, a stop and a thin film filter or an optical filter.
The first lens group G1 includes a first lens L1 in which both
surfaces R1 and R2 are aspheric. Referring to Table 2, the
thickness of the first lens L1 is 1.413171 mm. The first lens L1 is
separated from the stop by 0.647673 mm. The first lens L1 is formed
of a material having a refractive index of 1.529960 and a
.[.distribution value.]. .Iadd.dispersion constant .Iaddend.of
55.8.
The second lens group G2 includes a second lens L2 having a
refractive index of 1.755201 and a .[.distribution value.].
.Iadd.dispersion constant .Iaddend.of 27.5795. The fourth and fifth
surfaces R3 and R4 of the second lens L2 are spherical. Referring
to Table 2, the second lens L2 is separated from the first lens L1
by 0.1 mm. The second lens L2 has a thickness of .[.0.6.].
.Iadd.0.3 .Iaddend.mm.
The third lens group G3 includes a third lens L3. The third lens L3
includes sixth and seventh surfaces R5 and R6 which are aspheric.
The third lens L3 is separated from the second lens L2 by 2.126507
mm, and has a thickness of 0.8 mm. The third lens L3 is formed of a
material having a refractive index of 1.675133 and a
.[.distribution value.]. .Iadd.dispersion constant .Iaddend.of
49.8062.
The fourth lens group G4 includes a fourth lens L4. The fourth lens
L4 includes eighth and ninth surfaces R7 and R8 which are aspheric.
The fourth lens L4 is formed of a material having a refractive
index of 1.52996 and a .[.distribution value.]. .Iadd.dispersion
constant .Iaddend.of 55.8. The thin film filter or the optical
filter LP is formed on one surface of a BSC7-HOYA substrate by
optical thin film deposition, and outputs the light passed through
the fourth lens L4, with the light partially restricted. The thin
film filter or the optical filter LP is separated from the fourth
lens L4 by 0.657592 mm.
The aspheric specifications of the first, third, and fourth lenses
according to the sixth embodiment can be calculated as shown in
Table 9 according to formula (9).
TABLE-US-00009 TABLE 9 K A B C D E 2(R1) -0.519080 -0.306884E-02
0.210023E-02 -0.511064E-02 0.297608E-02 -0.933653E-03 3(R2)
-1.903494 -0.119853E-01 -0.166943E-02 -0.779414E-03 0.297154E-03
-0.211494E-03 4(R3) 5(R4) 6(R5) -23.161960 -0.342151E-01
0.297570E-02 0.127086E-02 -0.331654E-03 -0115883E-05 7(R6)
-2.184987 -0.101073E-01 -0.928938E-03 0.229837E-02 -0.435484E-03
0.286609E-04 8(R7) -6.252505 -0.387574E-01 0.750058E-02
-0.666702E-03 0.344665E-05 0.497617E-06 9(R8) -3.730467
-0.209098E-01 0.387332E-02 -0.561418E-03 0.327093E-04
-0.126355E-05
Embodiment 7
The optical imaging system 70 according to the seventh embodiment
includes a first lens group G1 having a positive refractive power,
a second lens group G2 having a negative refractive power, a third
lens group G3 having a positive or negative refractive power, a
fourth lens group G4 having a positive or negative refractive
power, a stop, and a thin film filter or an optical filter.
The first lens group G1 includes a first lens L1. The second and
third surfaces R1 and R2 of the first lens L1 are aspheric.
Referring to Table 2, the thickness of the first lens L1 is 1.5 mm.
The first lens L1 is separated from the stop by 0.346363 mm. The
first lens L1 is formed of a material having a refractive index of
1.529960 and a .[.distribution value.]. .Iadd.dispersion constant
.Iaddend.of 55.8.
The second lens group G2 includes a second lens L2 having a
refractive index of 1.755201 and a .[.distribution value.].
.Iadd.dispersion constant .Iaddend.of 27.5795. The fourth and fifth
surfaces R3 and R4 of the second lens L2 are spherical. Referring
to Table 2, the second lens L2 is separated from the first lens L1
by 0.132395 mm. The second lens has a thickness of 0.6 mm.
The third lens group G3 includes a third lens L3. The third lens L3
includes sixth and seventh surfaces R5 and R6 which are aspheric.
The third lens L3 is separated from the second lens L2 by 1.082514
mm, and has a thickness of 0.8 mm. The third lens L3 is formed of a
material having a refractive index of 1.52996 and a .[.distribution
value.]. .Iadd.dispersion constant .Iaddend.of 55.8.
The fourth lens group G4 includes a fourth lens L4. The fourth lens
L4 includes eighth and ninth surfaces R7 and R8 which are aspheric.
The fourth lens L4 is formed of a material having a refractive
index of 1.581283 and a .[.distribution value.]. .Iadd.dispersion
constant .Iaddend.of 62.5343. The thin film filter or the optical
filter LP is formed on one surface of a BSC7-HOYA substrate by
optical thin film deposition, and outputs partially restricted
light through the fourth lens L4. The thin film filter or the
optical filter LP is separated from the fourth lens L4 by 0.568307
mm.
The aspheric specifications of the first, third, and fourth lenses
according to the seventh preferred embodiment can be calculated as
shown in Table 10 according to formula (9).
TABLE-US-00010 TABLE 10 K A B C D E 2(R1) -0.225057 -0.331040E-02
0.124863E-01 -0.182585E-01 0.133184E-01 -0.345182E-02 3(R2)
-8.046311 -0.167705E-02 0.328944E-02 -0.511098E-03 -0.598276E-04
0.289249E-03 4(R3) 5(R4) 6(R5) -16.247560 -0.465774E-01
0.113697E-01 0.484777E-02 -0.139992E-02 0.124383E-03 7(R6)
-1.681469 -0.201264E-01 -0.355531E-02 0.780629E-02 -0.305484E-04
0.221913E-03 8(R7) -3.679745 -0.597223E-01 0.166450E-01
-0.222994E-02 0.305484E-04 0.102808E-04 9(R8) -3.208375
-0.436003E-01 0.103498E-01 -0.174130E-02 0.143919E-03
-0.563246E-05
Embodiment 8
The optical imaging system 80 according to the eighth embodiment
includes a first lens group G1 having a positive refractive power,
a second lens group G2 having a negative refractive power, a third
lens group G3 having a positive or negative refractive power, a
fourth lens group G4 having a positive or negative refractive
power, a stop, and a thin film filter or an optical filter.
The first lens group G1 includes a first lens L1. The second and
third surfaces R1 and R2 of the first lens L1 are aspheric.
Referring to Table 2, the thickness of the first lens L1 is
0.873219 mm. The first lens L1 is separated from the stop by
0.455563 mm. The first lens L1 is formed of a material having a
refractive index of 1.618194 and a .[.distribution value.].
.Iadd.dispersion constant .Iaddend.of 60.4374.
The second lens group G2 includes a second lens L2 having a
refractive index of 1.755201 and a .[.distribution value.].
.Iadd.dispersion constant .Iaddend.of 27.5795. The fourth and fifth
surfaces R3 and R4 of the second lens L2 are spherical. Referring
to Table 2, the second lens L2 is separated from the first lens L1
by 0.145862 mm. The second lens has a thickness of 0.3 mm.
The third lens group G3 includes a third lens L3. The third lens L3
includes sixth and seventh surfaces R5 and R6 which are aspheric.
The third lens L3 is separated from the second lens L2 by 0.162161
mm, and has a thickness of 1.936693 mm. The third lens L3 is formed
of a material having a refractive index of 1.62041 and a
.[.distribution value.]. .Iadd.dispersion constant .Iaddend.of
60.3236.
The fourth lens group G4 includes a fourth lens L4. The fourth lens
L4 includes eighth and ninth surfaces R7 and R8 which are aspheric.
The fourth lens L4 is formed of a material having a refractive
index of 1.755201 and a .[.distribution value.]. .Iadd.dispersion
constant .Iaddend.of 27.5795. The thin film filter or the optical
filter LP is formed on one surface of a BSC7-HOYA substrate by
optical thin film deposition, and outputs partially restricted
light passed through the fourth lens L4. The thin film filter or
the optical filter LP is separated from the fourth lens L4 by
0.75533392 mm.
The aspheric specifications of the first, third, and fourth lenses
according to the fifth embodiment can be calculated as shown in
Table 11 according to formula (9).
TABLE-US-00011 TABLE 11 K A B C D E 2(R1) -1.191537 -0.688942E-02
0.45124E-02 -0.510228E-02 0.398074E-02 -0.101575E-02 3(R2)
-18.472343 -0.122184E-01 -0.263919E-03 0.484905E-03 -0.122042E-03
-0.255869E-03 4(R3) 5(R4) 6(R5) -131.77000 -0.157791E-01
0.64132E-02 0.126895E-02 -0.440931E-03 -0.131678E-04 7(R6)
-1.874970 -0.219439E-01 -0.444306E-02 0.215012E-02 -0.346726E-03
0.643482E-04 8(R7) -2.843204 -0.606407E-01 0.869752E-02
0.885038E-04 0.256944E-04 -0.27499E-04 9(R8) -2.494280
-0.463456E-01 0.597186E-02 -0.418213E-03 0.361972E-04
-0.371985E-05
Embodiment 9
The optical imaging system 90 according to the ninth embodiment
includes a first lens group G1 having a positive refractive power,
a second lens group G2 having a negative refractive power, a third
lens group G3 having a positive or negative refractive power, a
fourth lens group G4 having a positive or negative refractive
power, a stop, and a thin film filter or an optical filter.
The first lens group G1 includes a first lens L1. The second and
third surfaces R1 and R2 are aspheric. Referring to Table 2, the
thickness of the first lens L1 is 1.151183 mm. The first lens L1 is
separated from the stop by 0.03 mm. The first lens L1 is formed of
a material having a refractive index of 1.544806 and a
.[.distribution value.]. .Iadd.dispersion constant .Iaddend.of
65.0658.
The second lens group G2 includes a second lens L2 having a
refractive index of 1.730603 and a .[.distribution value.].
.Iadd.dispersion constant .Iaddend.of 29.7565. The fourth and fifth
surfaces R3 and R4 of the second lens L2 are spherical. Referring
to Table 2, the second lens L2 is separated from the first lens L1
by 0.1 mm. The second lens has a thickness of 0.359346 mm.
The third lens group G3 includes a third lens L3. The third lens L3
includes sixth and seventh surfaces R5 and R6 which are aspheric.
The third lens L3 is separated from the second lens L2 by 2.268589
mm, and has a thickness of 0.958835 mm. The third lens L3 is formed
of a material having a refractive index of 1.581703 and a
.[.distribution value.]. .Iadd.dispersion constant .Iaddend.of
41.1859.
The fourth lens group G4 includes a fourth lens L4. The fourth lens
L4 includes eighth and ninth surfaces R7 and R8 which are aspheric.
The fourth lens L4 is formed of a material having a refractive
index of 1.590309 and a .[.distribution value.]. .Iadd.dispersion
constant .Iaddend.of 61.9836. The thin film filter or the optical
filter LP is formed on one surface of a BSC7-HOYA substrate by
optical thin film deposition, and outputs partially restricted
light through the fourth lens L4. The thin film filter or the
optical filter LP is separated from the fourth lens L4 by 0.635425
mm.
The aspheric specifications of the first, third, and fourth lenses
according to the ninth embodiment can be calculated as shown in
Table 12 according to formula (9).
TABLE-US-00012 TABLE 12 K A B C D E 2(R1) -0.430373 -0.390591E-02
0.392143E-02 -0.677606E-02 0.349668E-02 -0.844170E-03 3(R2)
-1.343031 -0.390591E-02 -0.221724E-02 -0.442053E-03 0.325453E-04
-0.124565E-03 4(R3) 5(R4) 6(R5) -7.614910 -0.468815E-01
0.861470E-03 0.504936E-03 -0.657574E-03 0.716095E-04 7(R6)
-4.320744 -0.814544E-02 -0.177486E-02 0.246353E-02 -0.378555E-03
0.360668E-04 8(R7) -3006.0608 -0.313430E-01 0.768252E-02
-0.638911E-03 0.198217E-04 0.177158E-06 9(R8) -14.736676
-0.325749E-01 0.463409E-02 -0.543938E-03 0.288680E-03
0.146074E-06
Embodiment 10
The optical imaging system 100 according to the tenth embodiment
includes a first lens group G1 having a positive refractive power,
a second lens group G2 having a negative refractive power, a third
lens group G3 having a positive or negative refractive power, a
fourth lens group G4 having a positive or negative refractive
power, a stop, and a thin film filter or an optical filter.
The first lens group G1 includes a first lens L1. The second and
third surfaces R1 and R2 of the first lens are aspheric. Referring
to Table 2, the thickness of the first lens L1 is 1.040923 mm. The
first lens L1 is separated from the stop by 0.112233 mm. The first
lens L1 is formed of a material having a refractive index of
1.529960 and a .[.distribution value.]. .Iadd.dispersion constant
.Iaddend.of 55.8.
The second lens group G2 includes a second lens L2 having a
refractive index of 1.75520 and a .[.distribution value.].
.Iadd.dispersion constant .Iaddend.of 27.5305. The fourth and fifth
surfaces R3 and R4 of the second lens L2 are spherical. Referring
to Table 2, the center portion of the second lens L2 makes contact
with the center of the first lens L1, and the thickness thereof is
0.6 mm.
The third lens group G3 includes a third lens L3. The third lens L3
includes sixth and seventh surfaces R5 and R6 which are aspheric.
The third lens L3 is separated from the second lens L2 by 0.75876
mm, and has a thickness of 0.8 mm. The third lens L3 is formed of a
material having a refractive index of 1.529960 and a
.[.distribution value.]. .Iadd.dispersion constant .Iaddend.of
55.8.
The fourth lens group G4 includes a fourth lens L4. The fourth lens
L4 includes eighth and ninth surfaces R7 and R8 which are aspheric.
The fourth lens L4 is formed of a material having a refractive
index of 1.529960 and a .[.distribution value.]. .Iadd.dispersion
constant .Iaddend.of 55.8. The thin film filter or the optical
filter LP is formed on one surface of a BSC7-HOYA substrate by
optical thin film deposition, and outputs partially restricted
light through the fourth lens L4. The thin film filter or the
optical filter LP is separated from the fourth lens L4 by 0.6
mm.
The aspheric specifications of the first, third, and fourth lenses
according to the tenth embodiment can be calculated as shown in
Table 3 according to formula (9).
TABLE-US-00013 TABLE 13 K A B C D E 2(R1) -0.243705 -0.472572E-02
0.208724E-01 -0.465959E-01 0.472830E-01 -0.179069E-01 3(R2)
-35.906408 -0.733648E-03 0.135638E-02 -0.206406E-03 -0.275201E-03
-0.584975E-04 4(R3) 5(R4) 6(R5) -15.792759 -0.660694E-01
0.201054E-01 0.975285E-02 -0.440095E-02 0.84255E-03 7(R6) -2.490058
-0.354334E-01 -0.109024E-01 0.185847E-01 -0.460071E-02 0.887947E-03
8(R7) -17.989764 -0.827253E-01 0.309534E-01 -0.550268E-02
0.881897E-04 0.596575E-04 9(R8) -5.078902 -0.565618E-01
0.183829E-01 -0.389874E-02 0.438295E-03 -0.216645E-04
Embodiment 11
The optical imaging system 50 according to the eleventh embodiment
includes a first lens group G1 having a positive refractive power,
a second lens group G2 having a negative refractive power, a third
lens group G3 having a positive or negative refractive power, a
fourth lens group G4 having a positive or negative refractive
power, a stop, and a thin film filter or an optical filter.
The first lens group G1 includes a first lens L1. The second and
third surfaces R1 and R2 of the first lens L1 are aspheric.
Referring to Table 3, the thickness of the first lens L1 is
.[.1.4903.]. .Iadd.0.4903 .Iaddend.mm. The first lens L1 is
separated from the stop by 0.122343 mm. The first lens L1 is formed
of a material having a refractive index of 1.529960 and a
.[.distribution value.]. .Iadd.dispersion constant .Iaddend.of
55.8.
The second lens group G2 includes a second lens L2 having a
refractive index of 1.75520 and a .[.distribution value.].
.Iadd.dispersion constant .Iaddend.of 27.5305. The fourth and fifth
surfaces R3 and R4 of the second lens L2 are aspheric. Referring to
Table 3, the second lens L2 is separated from the first lens L1 by
2.001108 mm. The second lens has a thickness of 0.3 mm.
The third lens group G3 includes a third lens L3. The third lens L3
includes sixth and seventh surfaces R5 and R6 which are aspheric.
The third lens L3 is separated from the second lens L2 by 0.672147
mm, and has a thickness of 1.123412 mm. The third lens L3 is formed
of a material having a refractive index of 1.529960 and a
.[.distribution value.]. .Iadd.dispersion constant .Iaddend.of
55.8.
The fourth lens group G4 includes a fourth lens L4. The fourth lens
L4 includes eighth and ninth surfaces R7 and R8 which are aspheric.
The fourth lens L4 is formed of a material having a refractive
index of 1.529960 and a .[.distribution value.]. .Iadd.dispersion
constant .Iaddend.of 55.8. The thin film filter or the optical
filter LP is formed on one surface of a BSC7-HOYA substrate by
optical thin film deposition, and outputs partially restricted
light through the fourth lens L4. The thin film filter or the
optical filter LP is separated from the fourth lens L4 by 0.53333
mm.
The aspheric specifications of the first, third, and fourth lenses
according to the eleventh embodiment can be calculated as shown in
Table 14 according to formula (9).
TABLE-US-00014 TABLE 14 K A B C D E 2(R1) -0.325702 -0.246211E-02
0.388533E-02 -0.604015E-02 0.380199E-02 -0.943180E-03 3(R2)
-41.631817 0.494266E-05 0.263179E-03 -0.354857E-03 -0.299644E-03
0.164888E-03 4(R3) 5(R4) 6(R5) 42.685665 -0.286127E-01 0.464775E-02
0.147457E-02 -0.275325E-03 0.261278E-04 7(R6) -2.322289
-0.142459E-01 -0.222570E-02 0.252860E-01 -0.342195E-03 0.386791E-04
8(R7) -5.810899 -0.278816E-01 0.765382E-02 -0.752745E-03
0.209383E-05 0.216703E-05 9(R8) -4.064375 -0.271353E-01
0.394463E-02 -0.533443E-03 0.332976E-04 -0.893693E-06
Embodiment 12
The optical imaging system 120 according to the twelfth embodiment
includes a first lens group G1 having a positive refractive power,
a second lens group G2 having a negative refractive power, a third
lens group G3 having a positive or negative refractive power, a
fourth lens group G4 having a positive or negative refractive
power, a stop, and a thin film filter or an optical filter.
The first lens group G1 includes a first lens L1. The second and
third surfaces R1 and R2 of the first lens L1 are aspheric.
Referring to Table 3, the thickness of the first lens L1 is
1.219838 mm. The first lens L1 is separated from the stop by
0.172863 mm. The first lens L1 is formed of a material having a
refractive index of 1.532889 and a .[.distribution value.].
.Iadd.dispersion constant .Iaddend.of 66.0182.
The second lens group G2 includes a second lens L2 having a
refractive index of 1.75520 and a .[.distribution value.].
.Iadd.dispersion constant .Iaddend.of 27.5795. The fourth and fifth
surfaces R3 and R4 of the second lens L2 are spherical. Referring
to Table 3, the second lens L2 is separated from the first lens L1
by .[.0.0.159417.]. .Iadd.0.159417 .Iaddend.mm. The second lens has
a thickness of 0.427352 mm.
The third lens group G3 includes a third lens L3. The third lens L3
includes sixth and seventh surfaces R5 and R6 which are aspheric.
The third lens L3 is separated from the second lens L2 by 0.742239
mm, and has a thickness of 0.8 mm. The third lens L3 is formed of a
material having a refractive index of 1.5296 and a .[.distribution
value.]. .Iadd.dispersion constant .Iaddend.of 55.8.
The fourth lens group G4 includes a fourth lens L4. The fourth lens
L4 includes eighth and ninth surfaces R7 and R8 which are aspheric.
The fourth lens L4 is formed of a material having a refractive
index of 1.529960 and a .[.distribution value.]. .Iadd.dispersion
constant .Iaddend.of 55.8. The thin film filter or the optical
filter LP is formed on one surface of a BSC7-HOYA substrate by
optical thin film deposition, and outputs partially restricted
light through the fourth lens L4. The thin film filter or the
optical filter LP is separated from the fourth lens L4 by 0.7
mm.
The aspheric specifications of the first, third, and fourth lenses
according to the twelfth embodiment can be calculated as shown in
Table 15 according to formula (9).
TABLE-US-00015 TABLE 15 K A B C D E 2(R1) -0.293313 -0.542927E-02
0.212559E-01 -0.461572E-01 0.474595E-01 -0.180297E-01 3(R2)
-35.036564 0.831924E-03 0.133528E-02 0.317237E-03 0.719662E-05
0.460349E-05 4(R3) 5(R4) 6(R5) -15.407195 -0.672666E-1 0.193978E-01
0.951188E-02 -0.442031E-02 0.886980E-03 7(R6) -2.475560
-0.356856E-01 -0.108935E-01 0.186240E-01 -0.459365E-02 0.878806E-03
8(R7) -14.369332 -0.818601E-01 0.304820E-01 -0.560236E-02
0.815708E-04 0.625730E-04 9(R8) -5.062053 -0.596198E-01
0.176196E-01 -0.390136E-02 0.437454E-03 -0.222993E-04
Embodiment 13
The optical imaging system 130 according to the thirteenth
embodiment includes a first lens group G1 having a positive
refractive power, a second lens group G2 having a negative
refractive power, a third lens group G3 having a positive or
negative refractive power, a fourth lens group G4 having a positive
or negative refractive power, a stop, and a thin film filter or an
optical filter.
The first lens group G1 includes a first lens L1. The second and
third surfaces R1 and R2 of the first lens L1 are aspheric.
Referring to Table 1, the thickness of the first lens L1 is
0.812558 mm. The first lens L1 is separated from the stop by 0.03
mm. The first lens L1 is formed of a material having a refractive
index of 1.602778 and a .[.distribution value.]. .Iadd.dispersion
constant .Iaddend.of 61.2648.
The second lens group G2 includes a second lens L2 having a
refractive index of 1.742011 and a .[.distribution value.].
.Iadd.dispersion constant .Iaddend.of 28.1334. The fourth and fifth
surfaces R3 and R4 of the second lens L2 are spherical. Referring
to Table 3, the second lens L2 is separated from the first lens L1
by 0.1 mm. The second lens L2 has a thickness of 0.3 mm.
The third lens group G3 includes a third lens L3. The third lens L3
includes sixth and seventh surfaces R5 and R6 which are aspheric.
The third lens L3 is separated from the second lens L2 by 0.556157
mm, and has a thickness of 0.8 mm. The third lens L3 is formed of a
material having a refractive index of 1.743972 and a
.[.distribution value.]. .Iadd.dispersion constant .Iaddend.of
44.8504.
The fourth lens group G4 includes a fourth lens L4. The fourth lens
L4 includes eighth and ninth surfaces R7 and R8 which are aspheric.
The fourth lens L4 is formed of a material having a refractive
index of 1.719343 and a .[.distribution value.]. .Iadd.dispersion
constant .Iaddend.of 29.1913. The thin film filter or the optical
filter LP is formed on one surface of a BSC7-HOYA substrate by
optical thin film deposition, and outputs partially restricted
light through the fourth lens L4. The thin film filter or the
optical filter LP is separated from the fourth lens L4 by 0.4
mm.
The aspheric specifications of the first, third, and fourth lenses
according to the thirteenth embodiment can be calculated as shown
in Table 16 according to formula (9).
TABLE-US-00016 TABLE 16 K A B C D E 2(R1) -3.105139 -0.765718E-02
-0.232543E-02 -0.548132E-02 0.355043E-02 -0.164865E-02 3(R2)
6.643484 -0.111248E-01 -0.189739E-02 -0.663328E-03 -0.291696E-03
0.148068E-04 4(R3) 5(R4) 6(R5) -61.837170 -0.307620E-01
-0.299148E-03 0.881036E-04 -0.555307E-03 0.287414E-03 7(R6)
-1.252353 -0.165700E-01 -0.2082050E-02 0.832299E-03 -0.505810E-03
0.104507E-03 8(R7) -4.091718 -0.559991E-01 0.354141E-02
-0.447725E-04 0.906043E-04 -0.235729E-04 9(R8) -4.478957
-0.316105E-01 0.411904E-02 -0.364491E-03 0.274454E-04
-0.207865E-05
Embodiment 14
The optical imaging system 140 according to the fourteenth
embodiment includes a first lens group G1 having a positive
refractive power, a second lens group G2 having a negative
refractive power, a third lens group G3 having a positive or
negative refractive power, a fourth lens group G4 having a positive
or negative refractive power, a stop, and a thin film filter or an
optical filter.
The first lens group G1 includes a first lens L1. The second and
third surfaces R1 and R2 of the first lens L1 are aspheric.
Referring to Table 3, the thickness of the first lens L1 is 1.1 mm.
The first lens L1 is separated from the stop by 0.480264 mm. The
first lens L1 is formed of a material having a refractive index of
1.529960 and a .[.distribution value.]. .Iadd.dispersion constant
.Iaddend.of 55.8.
The second lens group G2 includes a second lens L2 having a
refractive index of 1.75520 and a .[.distribution value.].
.Iadd.dispersion constant .Iaddend.of 27.5795. The fourth and fifth
surfaces R3 and R4 of the second lens L2 are spherical. Referring
to Table 3, the second lens L2 is separated from the first lens L1
by 0.1 mm. The second lens has a thickness of .[.0.1.]. .Iadd.0.5
.Iaddend.mm.
The third lens group G3 includes a third lens L3. The third lens L3
includes sixth and seventh surfaces R5 and R6 which are aspheric.
The third lens L3 is separated from the second lens L2 by 2.235814
mm, and has a thickness of .[.0.5.]. .Iadd.0.54408 .Iaddend.mm. The
third lens L3 is formed of a material having a refractive index of
1.675133 and a .[.distribution value.]. .Iadd.dispersion constant
.Iaddend.of 40.8062.
The fourth lens group G4 includes a fourth lens L4. The fourth lens
L4 includes eighth and ninth surfaces R7 and R8 which are aspheric.
The fourth lens L4 is formed of a material having a refractive
index of 1.529960 and a .[.distribution value.]. .Iadd.dispersion
constant .Iaddend.of 55.8. The thin film filter or the optical
filter LP is formed on one surface of a BSC7-HOYA substrate by
optical thin film deposition, and outputs partially restricted
light through the fourth lens L4. The thin film filter or the
optical filter LP is separated from the fourth lens L4 by 0.63848
mm.
The aspheric specifications of the first, third, and fourth lenses
according to the fourteenth embodiment can be calculated as shown
in Table 17 according to formula (9).
TABLE-US-00017 TABLE 17 K A B C D E 2(R1) -0.609678 -0.33651E-02
0.103994E-01 -0.531487E-02 0.265399E-02 -0.110303E-02 3(R2)
-2.046651 -0.118551E-01 -0.268572E-02 -0.121156E-02 0.310607E-03
-0.261769E-03 4(R3) -0.023479 -0.621511E-05 0.506488E-03
0.302229E-03 0.613363E-04 0.105352E-03 5(R4) -20.447531
0.207610E-03 0.4772207E-03 0.199399E-03 0.764266E-04 -0.296394E-04
6(R5) -28.099749 -0.345382E-01 0.291077E-02 0.117431E-02
-0.344832E-03 0.114845E-05 7(R6) -2.937952 -0.914876E-02
-0.914771E-03 0.232561E-02 -0.431406E-03 0.285117E-04 8(R7)
-7.164502 -0.397733E-01 0.765148E-02 -0.688572E-03 0.363819E-05
0.182078E-05 9(R8) -3.704332 -0.236715E-01 0.386753E-02
-0.536289E-03 0.341922E-04 -0.149054E-05
In sum, the optical imaging system of the present invention reduces
the volume and minimizes the deterioration of the optical
characteristics, such as flares, with a high resolution.
While the invention has been shown and described with reference to
certain preferred embodiments thereof, it will be understood by
those skilled in the art that various changes in form and details
may be made therein without departing from the spirit and scope of
the invention as defined by the appended claims.
* * * * *