CN111505800B - 200mm fixed-focus lens without diffraction surface for 1.5-5.0 um high-frame frequency refrigeration type medium wave infrared core - Google Patents
200mm fixed-focus lens without diffraction surface for 1.5-5.0 um high-frame frequency refrigeration type medium wave infrared core Download PDFInfo
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- CN111505800B CN111505800B CN202010322204.2A CN202010322204A CN111505800B CN 111505800 B CN111505800 B CN 111505800B CN 202010322204 A CN202010322204 A CN 202010322204A CN 111505800 B CN111505800 B CN 111505800B
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 28
- 239000005387 chalcogenide glass Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- PFNQVRZLDWYSCW-UHFFFAOYSA-N (fluoren-9-ylideneamino) n-naphthalen-1-ylcarbamate Chemical compound C12=CC=CC=C2C2=CC=CC=C2C1=NOC(=O)NC1=CC=CC2=CC=CC=C12 PFNQVRZLDWYSCW-UHFFFAOYSA-N 0.000 claims description 6
- 239000005083 Zinc sulfide Substances 0.000 claims description 6
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 6
- 229910001634 calcium fluoride Inorganic materials 0.000 claims description 6
- 229910052984 zinc sulfide Inorganic materials 0.000 claims description 6
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 claims description 6
- 230000004075 alteration Effects 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 11
- 238000003384 imaging method Methods 0.000 abstract description 11
- 230000002411 adverse Effects 0.000 abstract description 3
- 230000003287 optical effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000002834 transmittance Methods 0.000 description 4
- 238000009529 body temperature measurement Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000003331 infrared imaging Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000001931 thermography Methods 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/14—Optical objectives specially designed for the purposes specified below for use with infrared or ultraviolet radiation
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
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Abstract
The invention discloses a 200mm prime lens for a 1.5-5.0 um high frame frequency refrigeration type medium wave infrared core without a diffraction surface, which comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from an object side to an image surface; the first lens is a negative focal power lens with a convex surface facing to the object side; the second lens is a biconvex positive focal power lens; the third lens is a negative focal power lens with a concave surface facing the object side; the fourth lens is a positive focal power lens with a concave surface facing the object side; the fifth lens is a biconvex positive focal power lens; the sixth lens is a negative power lens with a concave surface facing the object side. The fixed-focus lens has no diffraction surface, high lens energy utilization rate and more abundant acquired information, eliminates the adverse effect of chromatic aberration and has good imaging effect.
Description
Technical Field
The invention relates to a 200mm fixed-focus lens without a diffraction surface for a 1.5-5.0 um high-frame-frequency refrigeration type medium-wave infrared core, and belongs to the field of high-frame-frequency refrigeration type medium-wave infrared fixed-focus lenses.
Background
The 1.5-5.0 um high frame frequency refrigeration type medium wave infrared machine core is applied to the scientific research and industrial fields of linear thermal imaging, explosion research, target characteristic detection, high-speed target detection tracking, camouflage and anti-camouflage, mechanical equipment state monitoring and the like, and has the characteristics of high sensitivity, wide temperature measurement range, high temperature measurement precision, high measurement speed and the like.
The refrigeration type medium wave lens that can be looked up at present is generally nominally applicable to 3.0um-5.0um, and in reality most eliminates chromatic aberration according to 3.7um-4.8um wave band, and this type of lens can cause energy loss and 1.5um-3.0um wave band information loss on the core of 1.5um-5.0 um. Horsepower et al in 12 months in 2017, a solution of a lens with a focal length of 85mm is given in article 1.3-5um wide-band infrared imaging optical system design published in journal of optics and photoelectric technology, volume 15, and phase 6, and the solution uses two aspheric surfaces and additionally a diffraction surface. The use of the diffraction surface can reduce the energy transmittance of the lens, reduce the temperature difference sensitivity of the system and increase the processing difficulty and cost of the lens.
Disclosure of Invention
The range of a wave band of 1.5um-5.0um is wide, particularly, the lens with the focal length more than 150mm is difficult to correct chromatic aberration, a diffractive optical element which is usually used for correcting chromatic aberration has the defects of low diffraction efficiency and serious stray light in the wave band, and aiming at the problems, the application provides a 200mm fixed-focus lens which is suitable for a high-frame-frequency refrigeration type medium-wave infrared movement with 1.5um-5.0um and has no diffraction surface, and the lens is combined with reasonable collocation of infrared glass materials, eliminates the adverse effect of chromatic aberration and achieves better imaging effect.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a200 mm prime lens for a 1.5-5.0 um high frame frequency refrigeration type medium wave infrared core without a diffraction surface comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from an object side to an image surface; the first lens is a negative focal power lens with a convex surface facing to the object side; the second lens is a biconvex positive focal power lens; the third lens is a negative focal power lens with a concave surface facing the object side; the fourth lens is a positive focal power lens with a concave surface facing the object side; the fifth lens is a biconvex positive focal power lens; the sixth lens is a negative power lens with a concave surface facing the object side.
The fixed-focus lens has no diffraction surface, high lens energy utilization rate and more abundant acquired information, eliminates the adverse effect of chromatic aberration and has good imaging effect.
Further, for satisfying 100% cold stop efficiency, adopt the secondary imaging mode, can compress the preceding group lens bore simultaneously, satisfy: -1.2< f 0'/f < -0.9; 0.4< f1 '/f' < 0.5; -0.35< f 2'/f < -0.25; 0.9< f3 '/f' < 1.2; -0.35< f 4'/f < -0.25; -0.1< f 5'/f < -0.05; 0.3< f6 '/f' < 0.5; wherein f' is the focal length of the fixed-focus lens; f 0' is the combined focal length of the first, second, third and fourth lenses; f 1' is the focal length of the first lens; f 2' is the focal length of the second lens; f 3' is the focal length of the third lens; f 4' is the focal length of the fourth lens; f 5' is the focal length of the fifth lens; f 6' is the focal length of the sixth lens.
Further, in order to eliminate chromatic aberration of a wide band of 1.5-5.0 um, chalcogenide glass, zinc selenide, zinc sulfide and calcium fluoride which have higher transmittance in the band are matched with each other for each lens, and further, preferably, the first lens and the fourth lens are made of chalcogenide glass, and the preferred chalcogenide glass is domestic IRG206 or HWS 6; the second lens is made of zinc selenide; the third lens and the sixth lens are made of calcium fluoride; the material used for the fifth lens is zinc sulfide.
Further, to correct other aberrations, from the object side to the image plane, two surfaces of the fourth lens element are sequentially a fourth object-side surface and a fourth image-side surface, two surfaces of the fifth lens element are sequentially a fifth object-side surface and a fifth image-side surface, and both the fourth image-side surface and the fifth object-side surface are aspheric surfaces.
In order to further improve the imaging effect, two surfaces of the first lens are a first object side surface and a first image side surface in sequence, two surfaces of the second lens are a second object side surface and a second image side surface in sequence, two surfaces of the third lens are a third object side surface and a third image side surface in sequence, two surfaces of the sixth lens are a sixth object side surface and a sixth image side surface in sequence, and the first object side surface, the first image side surface, the second object side surface, the second image side surface, the third object side surface, the third image side surface, the fourth object side surface, the fifth image side surface, the sixth object side surface and the sixth image side surface are spherical surfaces.
In order to further improve the imaging effect, the curvature radius of the first object side surface is 191-205 mm, the curvature radius of the first image side surface is 80-90 mm, the curvature radius of the second object side surface is-395.7 +/-0.5 mm, the curvature radius of the third object side surface is-55.3 +/-0.5 mm, the curvature radius of the third object side surface is-137.9 +/-0.5 mm, the curvature radius of the fourth object side surface is-16.5 +/-0.5 mm, the curvature radius of the fourth object side surface is-27.7 +/-0.5 mm, the curvature radius of the fifth object side surface is 40-50 mm, the curvature radius of the fifth object side surface is-32.5 +/-0.5 mm, the curvature radius of the sixth object side surface is-30.7 +/-0.5 mm, and the curvature radius of the sixth object side surface is-800 +/-0.5 mm,
in order to ensure the imaging effect and the use strength, the center thickness of the first lens is 4.3 +/-0.05 mm, the center thickness of the second lens is 15 +/-0.05 mm, the center thickness of the third lens is 13 +/-0.05 mm, the center thickness of the fourth lens is 12 +/-0.05 mm, the center thickness of the fifth lens is 10 +/-0.05 mm, and the center thickness of the sixth lens is 3 +/-0.05 mm.
In order to further ensure the imaging effect, the outer diameter of the first lens is 75-80 mm, the outer diameter of the second lens is 78-79 mm, the outer diameter of the third lens is 24-27 mm, the outer diameter of the fourth lens is 16-27 mm, the central outer diameter of the fifth lens is 29-30 mm, and the outer diameter of the sixth lens is 27-30 mm.
The application is used for a 200mm prime lens without a diffraction surface of a 1.5um-5.0um high frame frequency refrigeration type medium wave infrared core, the focal length of the lens is 200mm, F/#3.0 is suitable for the 1.5um-5um high frame frequency refrigeration type medium wave infrared core, the number of core pixels is 640 multiplied by 512, and the pixel size is 15 um.
The prior art is referred to in the art for techniques not mentioned in the present invention.
The invention is used for the 200mm prime lens with the high frame frequency refrigeration type medium wave infrared machine core of 1.5um-5.0um and without the diffraction surface, and has the following beneficial effects:
1) the device is suitable for 1.5-5.0 um wide-band refrigeration type high-frame-frequency infrared machine cores, and has the advantages of high energy utilization rate, richer acquired information, good achromatism effect and high imaging quality compared with 3.0-5.0um or 3.7-4.8 um band lenses;
2) the focal length is 200mm, and the action distance is long;
3) in order to eliminate the influence of chromatic aberration of a wide waveband of 1.5-5.0 um, the problems of low diffraction efficiency and serious stray light caused by the use of a diffraction surface are further avoided by adopting the matching of materials with high transmittance in the waveband;
4) secondary imaging is adopted to meet 100% of cold diaphragm efficiency, and the outer diameter of the front group is effectively compressed.
Drawings
FIG. 1 is a system optical path diagram of a 200mm prime lens of the present invention for a 1.5um-5.0um high frame frequency refrigeration type medium wave infrared cassette mechanism without diffraction surface;
FIG. 2 is a transfer function diagram of a 200mm prime lens of the present invention for a 1.5um-5.0um high frame frequency refrigeration type medium wave infrared cassette mechanism without diffraction surface;
FIG. 3 is a diagram of distortion and field curvature of a 200mm prime lens of the present invention for a 1.5um-5.0um high frame frequency refrigeration type medium wave infrared cassette mechanism without diffraction surface;
FIG. 4 is an axial chromatic aberration diagram of a 200mm prime lens of the present invention for a 1.5um-5.0um high frame frequency refrigeration type medium wave infrared cassette mechanism without a diffraction surface;
FIG. 5 is a vertical axis chromatism graph of a 200mm prime lens without a diffraction surface for a 1.5um-5.0um high frame frequency refrigeration type medium wave infrared movement according to the present invention;
in the drawing, L1 denotes a first lens, L2 denotes a second lens, L3 denotes a third lens, L4 denotes a fourth lens, L5 denotes a fifth lens, and L6 denotes a sixth lens.
Detailed Description
In order to better understand the present invention, the following examples are further provided to illustrate the present invention, but the present invention is not limited to the following examples.
Aiming at 1.5um-5um high frame frequency refrigeration type medium wave infrared movement F/#3.0, the number of movement pixels is 640x512, the pixel size is 15um, and the focal length is 200 mm; as shown in fig. 1, the 200mm fixed focus lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, which are arranged in sequence from an object side to an image plane; the first lens is a negative focal power lens with a convex surface facing to the object side; the second lens is a biconvex positive focal power lens; the third lens is a negative focal power lens with a concave surface facing the object side; the fourth lens is a positive focal power lens with a concave surface facing the object side; the fifth lens is a biconvex positive focal power lens; the sixth lens is a negative focal power lens with a concave surface facing the object side; .
Adopt secondary imaging to satisfy 100% cold diaphragm efficiency, effectively compressed front group external diameter simultaneously, the lens focus satisfies: -1.2< f 0'/f < -0.9; 0.4< f1 '/f' < 0.5; -0.35< f 2'/f < -0.25; 0.9< f3 '/f' < 1.2; -0.35< f 4'/f < -0.25; -0.1< f 5'/f < -0.05; 0.3< f6 '/f' < 0.5; wherein f 0' is the combined focal length of the first, second, third and fourth lenses; f' is the lens combination focal length; f 1' is the focal length of the first lens; f 2' is the focal length of the second lens; f 3' is the focal length of the third lens; f 4' is the focal length of the fourth lens; f 5' is the focal length of the fifth lens; f 6' is the focal length of the sixth lens;
in order to eliminate chromatic aberration of wide wave bands of 1.5-5.0 um, chalcogenide glass, zinc selenide, zinc sulfide and calcium fluoride with higher transmittance in the wave bands are used in a matching way, and the chalcogenide glass (domestic IRG206 or HWS6) is used for the specific first lens and the specific fourth lens; the second lens uses zinc selenide; the third lens and the sixth lens use calcium fluoride; the fifth lens uses zinc sulfide;
from the object side to the image plane, two surfaces of the first lens are a first object side surface S1 and a first image side surface S2 in sequence, two surfaces of the second lens are a second object side surface S3 and a second image side surface S4 in sequence, two surfaces of the third lens are a third object side surface S5 and a third image side surface S6 in sequence, two surfaces of the fourth lens are a fourth object side surface S7 and a fourth image side surface S8 in sequence, two surfaces of the fifth lens are a fifth object side surface S9 and a fifth image side surface S10 in sequence, and two surfaces of the sixth lens are a sixth object side surface S11 and a sixth image side surface S12 in sequence; the two surfaces of the window sheet are sequentially a seventh object side surface S13, a seventh image side surface S14, a cold stop S15 and an image surface S16, and the parameters of each lens are shown in Table 1.
TABLE 1 parameter settings for each lens
In table 1, R represents a radius of curvature, and a range of values of the radius of curvature given by a part of the surface, such as surface S1, 191< R <205 represents a value of the radius of curvature in a range of 191mm to 205 mm; the interval column, the first row corresponding to each lens represents the thickness of the lens, and the second row represents the interval of the lens; a column of material, a first row of each lens representing lens material and a second row representing lens spacing; to correct other aberrations, aspheric surfaces are used for the fourth image-side surface S8 and the fifth object-side surface S9, and the coefficients are shown in table 2.
TABLE 2 aspherical coefficients
The aspheric equations used for each surface in table 2 are:
wherein the amounts have the following meanings:
ZA: the lens rise of the aspheric surface in the optical axis direction;
r: radius of curvature at the intersection of the surface and the optical axis OO';
y: a half aperture of the lens perpendicular to the optical axis direction;
k: a cone coefficient;
A. b, C, D, E aspheric coefficients;
as can be seen from the transfer function of FIG. 2, the MTF value is substantially greater than 0.45 in 30 pairs, the curves of the meridian direction and the sagittal direction are relatively concentrated, and the image quality is excellent; as can be seen from fig. 3, the distortion is < 2%; as can be seen from FIG. 4, the correction of the axial chromatic aberration is less than 120um, and as can be seen from FIG. 5, the vertical axis chromatic aberration is basically controlled within the diffraction limit airy disk, and the chromatic aberration is corrected well.
Claims (9)
1. The utility model provides a 200mm tight shot that is used for 1.5um-5.0um high frame frequency refrigeration type medium wave infrared core to have no diffraction plane which characterized in that: the lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from an object side to an image plane; the first lens is a negative focal power lens with a convex surface facing to the object side; the second lens is a biconvex positive focal power lens; the third lens is a negative focal power lens with a concave surface facing the object side; the fourth lens is a positive focal power lens with a concave surface facing the object side; the fifth lens is a biconvex positive focal power lens; the sixth lens is a negative focal power lens with a concave surface facing the object side;
-1.2< f 0'/f < -0.9; 0.4< f1 '/f' < 0.5; -0.35< f 2'/f < -0.25; 0.9< f3 '/f' < 1.2; -0.35< f 4'/f < -0.25; -0.1< f 5'/f < -0.05; 0.3< f6 '/f' < 0.5; wherein f' is the focal length of the fixed-focus lens; f 0' is the combined focal length of the first, second, third and fourth lenses; f 1' is the focal length of the first lens; f 2' is the focal length of the second lens; f 3' is the focal length of the third lens; f 4' is the focal length of the fourth lens; f 5' is the focal length of the fifth lens; f 6' is the focal length of the sixth lens.
2. The 200mm prime lens for a 1.5um-5.0um high frame rate refrigeration type medium wave infrared movement non-diffraction surface of claim 1, characterized in that: the materials used for the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are a combination of chalcogenide glass, zinc selenide, zinc sulfide and calcium fluoride.
3. The 200mm prime lens for a 1.5um-5.0um high frame rate refrigeration type medium wave infrared movement non-diffraction surface of claim 2, characterized in that: the first lens and the fourth lens are made of chalcogenide glass; the second lens is made of zinc selenide; the third lens and the sixth lens are made of calcium fluoride; the material used for the fifth lens is zinc sulfide.
4. The 200mm prime lens for a 1.5um-5.0um high frame rate refrigeration type medium wave infrared cassette mechanism non-diffraction surface according to any one of claims 1-3, characterized in that: from the object side to the image plane, two surfaces of the fourth lens are a fourth object side surface and a fourth image side surface in sequence, two surfaces of the fifth lens are a fifth object side surface and a fifth image side surface in sequence, and the fourth image side surface and the fifth object side surface are aspheric surfaces.
5. The 200mm prime lens for a 1.5um-5.0um high frame rate refrigeration type medium wave infrared movement non-diffraction surface of claim 4, characterized in that: the two surfaces of the first lens are a first object side surface and a first image side surface in sequence, the two surfaces of the second lens are a second object side surface and a second image side surface in sequence, the two surfaces of the third lens are a third object side surface and a third image side surface in sequence, the two surfaces of the sixth lens are a sixth object side surface and a sixth image side surface in sequence, and the first object side surface, the first image side surface, the second object side surface, the second image side surface, the third object side surface, the third image side surface, the fourth object side surface, the fifth image side surface, the sixth object side surface and the sixth image side surface are spherical surfaces.
6. The 200mm prime lens for a 1.5um-5.0um high frame rate refrigeration type medium wave infrared movement non-diffraction surface of claim 5, characterized in that: the curvature radius of the first object side surface is 191-205 mm, the curvature radius of the first image side surface is 80-90 mm, the curvature radius of the second object side surface is-395.7 +/-0.5 mm, the curvature radius of the third object side surface is-55.3 +/-0.5 mm, the curvature radius of the third object side surface is-137.9 +/-0.5 mm, the curvature radius of the fourth object side surface is-16.5 +/-0.5 mm, the curvature radius of the fourth object side surface is-27.7 +/-0.5 mm, the curvature radius of the fifth object side surface is 40-50 mm, the curvature radius of the fifth object side surface is-32.5 +/-0.5 mm, the curvature radius of the sixth object side surface is-30.7 +/-0.5 mm, and the curvature radius of the sixth object side surface is-800 +/-0.5 mm.
7. The 200mm prime lens for a 1.5um-5.0um high frame rate refrigeration type medium wave infrared cassette mechanism non-diffraction surface according to any one of claims 1-3, characterized in that: the center thickness of the first lens is 4.3 +/-0.05 mm, the center thickness of the second lens is 15 +/-0.05 mm, the center thickness of the third lens is 13 +/-0.05 mm, the center thickness of the fourth lens is 12 +/-0.05 mm, the center thickness of the fifth lens is 10 +/-0.05 mm, and the center thickness of the sixth lens is 3 +/-0.05 mm.
8. The 200mm prime lens for a 1.5um-5.0um high frame rate refrigeration type medium wave infrared cassette mechanism non-diffraction surface according to any one of claims 1-3, characterized in that: the outer diameter of the first lens is 75-80 mm, the outer diameter of the second lens is 78-79 mm, the outer diameter of the third lens is 24-27 mm, the outer diameter of the fourth lens is 16-27 mm, the outer diameter of the center of the fifth lens is 29-30 mm, and the outer diameter of the sixth lens is 27-30 mm.
9. The 200mm prime lens for a 1.5um-5.0um high frame rate refrigeration type medium wave infrared cassette mechanism non-diffraction surface according to any one of claims 1-3, characterized in that: the focal length is 200mm, the F number is 3.0, the number of the core pixels is 640 multiplied by 512, and the pixel size is 15 um.
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| CN202010322204.2A CN111505800B (en) | 2020-04-22 | 2020-04-22 | 200mm fixed-focus lens without diffraction surface for 1.5-5.0 um high-frame frequency refrigeration type medium wave infrared core |
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| CN202010322204.2A CN111505800B (en) | 2020-04-22 | 2020-04-22 | 200mm fixed-focus lens without diffraction surface for 1.5-5.0 um high-frame frequency refrigeration type medium wave infrared core |
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| TW201728943A (en) * | 2016-12-16 | 2017-08-16 | 玉晶光電股份有限公司 | Optical imaging lens |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN208110150U (en) * | 2018-05-07 | 2018-11-16 | 南京波长光电科技股份有限公司 | A kind of large format LONG WAVE INFRARED PASSIVE OPTICAL athermal fish eye lens |
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2020
- 2020-04-22 CN CN202010322204.2A patent/CN111505800B/en active Active
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|---|---|---|---|---|
| JPH01201614A (en) * | 1988-02-08 | 1989-08-14 | Olympus Optical Co Ltd | Variable power lens |
| CN101038365A (en) * | 2006-03-17 | 2007-09-19 | 索尼株式会社 | Lens unit |
| JP2008203650A (en) * | 2007-02-21 | 2008-09-04 | Nikon Corp | Variable power afocal optical system |
| JPWO2009063766A1 (en) * | 2007-11-15 | 2011-03-31 | コニカミノルタオプト株式会社 | Variable magnification optical system, imaging device, and digital device |
| CN201444211U (en) * | 2008-10-28 | 2010-04-28 | 富士能株式会社 | Picture pick-up lens and picture pick-up device using same |
| JP2010107531A (en) * | 2008-10-28 | 2010-05-13 | Fujinon Corp | Imaging lens and imaging apparatus using the imaging lens |
| JP2013195587A (en) * | 2012-03-16 | 2013-09-30 | Ricoh Co Ltd | Imaging lens system, image capturing device, and information device |
| TW201728943A (en) * | 2016-12-16 | 2017-08-16 | 玉晶光電股份有限公司 | Optical imaging lens |
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