CN209167667U - A kind of big zoom ratio medium-wave infrared refrigeration continuous magnification lens - Google Patents
A kind of big zoom ratio medium-wave infrared refrigeration continuous magnification lens Download PDFInfo
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- CN209167667U CN209167667U CN201821513144.7U CN201821513144U CN209167667U CN 209167667 U CN209167667 U CN 209167667U CN 201821513144 U CN201821513144 U CN 201821513144U CN 209167667 U CN209167667 U CN 209167667U
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 23
- 229910052732 germanium Inorganic materials 0.000 claims abstract description 20
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims abstract description 20
- 230000003287 optical effect Effects 0.000 claims abstract description 18
- 239000000571 coke Substances 0.000 claims abstract description 17
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 8
- 239000010703 silicon Substances 0.000 claims abstract description 8
- 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 abstract description 4
- 239000013078 crystal Substances 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 230000006978 adaptation Effects 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 235000012149 noodles Nutrition 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 3
- 238000009499 grossing Methods 0.000 abstract description 2
- 238000003384 imaging method Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 8
- 230000004075 alteration Effects 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000009738 saturating Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000005499 meniscus Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
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Abstract
The utility model discloses a kind of big zoom ratio medium-wave infrared refrigeration continuous magnification lens, successively there are five groups of lens from object space to image space, it include: first fixed group with positive light coke, including a piece of convex surface towards the falcate silicon positive lens of object space, falcate germanium negative lens of a piece of convex surface towards object space；Zoom group with negative power is a piece of concave concave germanium negative lens；Compensation group with positive light coke is a piece of lenticular zinc selenide positive lens；Focusing group with positive light coke is a piece of falcate germanium positive lens；Latter fixed group with positive light coke, including a piece of convex surface towards the falcate germanium positive lens of image space, falcate germanium negative lens of a piece of convex surface towards image space, falcate silicon positive lens of a piece of convex surface towards image space.The utility model can within the scope of 15mm~300mm continuous vari-focus, be suitable for 640x512,15 μm of Pixel size of medium wave refrigeration detector；The zoom and compensation group shift motion is short and curve smoothing in complete burnt section, optical axis stable is high, there is good imaging effect；It is small in size compared to same type camera lens, it is light-weight, it is more economical practical.
Description
Technical field
The utility model belongs to optical technical field, is related in a kind of big zoom ratio for medium-wave infrared refrigeration detector
The infrared refrigeration continuous magnification lens of wave.
Background technique
With the development of present optical technology, it is seen that light zoom lens has been popularized, it is either military or it is civilian all
To being widely applied.Infrared technique also reaches its maturity therewith, gradually draws close to visible light lens field, and tight shot is not
It is able to satisfy the demand of more occasions, is needed using to continuous magnification lens.Infrared zoom lens are that one kind passes through change
The object lens that the relative position of certain lens groups changes its focal length continuously in a certain range in system.But it is general infrared
Continuous magnification lens, due to consideration that usual zoom ratio will not be very big the considerations of to image quality, it is more difficult to accomplish big zoom ratio with
Balance between image quality.Therefore there are big zoom ratio and image quality relatively high continuous vari-focus again there is an urgent need to a kind of
Camera lens.Due to for the camera lens that freezes, the features such as in addition this camera lens should also combine small size, light weight.Opposite same type mirror
Head the utility model eyeglass number is less, and cost is cheaper.
Utility model content
The utility model provides a kind of big zoom ratio medium-wave infrared refrigeration continuous magnification lens, technical problems to be solved
It is to provide a kind of total length of optics, small in size, adjustment is convenient, and zoom ratio is big, the high camera lens of image quality.Its service band is
3.7~4.8 microns, focal length is 15mm~300mm, and number=4 F, adaptation resolution ratio is 640x512, the system that 15 microns of Pixel size
Cold detector, optical system overall length 160mm, maximum caliber 78mm.
To achieve the goals above, the technical solution adopted in the utility model are as follows:
A kind of big zoom ratio medium-wave infrared refrigeration continuous magnification lens, successively include first fixed group, change by object space to image space
Times group, focusing group, fixes group, diaphragm and explorer portion at compensation group afterwards；
Fixed group has positive light coke before described, and the falcate silicon single crystal including a piece of convex surface in front towards object space is just saturating
Mirror, surface type are spherical surface；Below a piece of convex surface towards object space falcate germanium single crystal negative lens, towards the side of image space
It is aspherical；
The zoom group has negative power, is a piece of double concave germanium single crystal negative lens, is non-towards the side of object space
Spherical surface, total shift motion 29.96mm of the lens, for changing the focal length of the medium wave infrared continuous zoom lens；
The compensation group has positive light coke, is a piece of lenticular zinc selenide positive lens, is non-towards the side of image space
Spherical surface, total shift motion 22.16mm of the lens, occurs when for compensating the medium wave infrared continuous zoom lens zoom
Image planes positional shift；
The focusing group has positive light coke, is falcate germanium single crystal positive lens of a piece of convex surface towards object space, concave surface
For diffraction surfaces, total shift motion 2.29mm of the lens, image planes position is inclined when for compensating different temperatures and different object distances
It moves；
Fixed group has positive light coke after described, and the falcate germanium single crystal including a piece of convex surface in front towards image space is just saturating
Mirror, surface type are spherical surface；Towards the falcate germanium single crystal negative lens of image space, concave surface is diffraction surfaces on intermediate a piece of convex surface；
Towards the falcate silicon single crystal positive lens of image space, surface type is spherical surface on a piece of convex surface below；
It is medium wave refrigeration detector part, including protecting window, cold screen, cold stop and image planes after the rear fixed group；
Protecting window is located at compensation group rear surface, and cold screen is located at protecting window rear surface, and cold stop is located at cold screen rear surface, zooming procedure
In keep constant.
The camera lens meets following parameter:
Number=4 effective focal length EFL=15~300mm, F of the camera lens, optical system overall length=160mm, adaptation detection
Device resolution ratio 640x512,15 μm of Pixel size.
The horizontal field of view angular region of the camera lens are as follows: 2w=35.5 °~1.8 °.
Aspherical in the eyeglass of the camera lens meets following expression formula:
Wherein z be it is aspherical along optical axis direction when being highly the position of r, away from aspheric vertex of surface apart from rise, c is indicated
The vertex curvature on surface, k are circular cone coefficient, α2、α3、α4、α5、α6For high order aspheric surface coefficient.
Diffraction surfaces in the eyeglass of the camera lens meet following expression formula:
Φ=A1ρ2+A2ρ4
Wherein Φ is the position phase of diffraction surfaces, ρ=r/rn,rnIt is the planning radius of diffraction surfaces, A1、A2For the position phase of diffraction surfaces
Coefficient.
Surface coating diamond-like carbon film of first lens close to object side.
The utility model has the following beneficial effects: possessing 20 times of zoom ratios, optical system overall length is 160mm, maximum caliber
78mm.Compact-sized, zoom curve smoothing, eyeglass maximum amount of movement is 29.96mm.Zoom group and compensation group only have a piece of
Mirror can preferably guarantee the optical axis stable in zooming procedure in this way.Refractive optical structure is used simultaneously, adjustment is easy,
It is easy to volume production.Image quality is excellent in entire zooming range, the@of average MTF > 0.523 20lp/mm of full filed.
Detailed description of the invention
Fig. 1 is the focal length of big zoom ratio medium-wave infrared refrigeration continuous magnification lens provided by the utility model when being 300mm
Optical system diagram；
Fig. 2 is the focal length of big zoom ratio medium-wave infrared refrigeration continuous magnification lens provided by the utility model when being 300mm
Point range figure；
Fig. 3 is the focal length of big zoom ratio medium-wave infrared refrigeration continuous magnification lens provided by the utility model when being 300mm
Optical transfer function figure (cut-off resolution ratio be 20lp/mm)；
Fig. 4 is the focal length of big zoom ratio medium-wave infrared refrigeration continuous magnification lens provided by the utility model when being 300mm
Curvature of field distortion figure；
Fig. 5 is the focal length of big zoom ratio medium-wave infrared refrigeration continuous magnification lens provided by the utility model when being 15mm
Optical system diagram；
Fig. 6 is the focal length of big zoom ratio medium-wave infrared refrigeration continuous magnification lens provided by the utility model when being 15mm
Point range figure；
Fig. 7 is the focal length of big zoom ratio medium-wave infrared refrigeration continuous magnification lens provided by the utility model when being 15mm
Optical transfer function figure (cut-off resolution ratio is 20lp/mm)；
Fig. 8 is the focal length of big zoom ratio medium-wave infrared refrigeration continuous magnification lens provided by the utility model when being 15mm
Curvature of field distortion figure；
Wherein, 100- object space, fixes group before L1, L2-, L3- zoom group, L4- compensation group, L5- focusing group, L6, L7,
Group is fixed after L7-, 101- detector protecting window, the cold screen of 102-, S17- cold stop, 103- image planes, S1~S16 is that lens are each
Surface.
Specific embodiment
Below in conjunction with attached drawing, the utility model is described in further details by embodiment.
The embodiment be the utility model be applied to medium wave refrigeration 15 μm of 640 × 512 pixel dimension of resolution ratio stare formed coke
The example of planar detector.
Fig. 1, Fig. 5 are respectively optical system diagram of the utility model in focal length 300mm, 15mm, the structure of the camera lens
It is identical, as explanation by taking one of figure as an example.
As shown in Figure 1, the present embodiment includes the preceding fixed group L1 and L2 of positive light coke, the zoom group L3 of negative power, just
The compensation group L4 of focal power, the focusing group L5 of positive light coke, rear fixed group L6, L7 and L8 of positive light coke and last spy
Survey device 101,102, S17,103.
In first fixed group, L1 i.e. the first lens are positive lens of the convex surface towards object space, and material is silicon single crystal, two table
Face is spherical surface, and L2 i.e. the second lens are negative lens of the convex surface towards object space, and material is germanium single crystal, and the surface S4 is aspherical.Become
Group L3, that is, the third lens again are double concave negative lens, and material is germanium single crystal, and the surface S5 is aspherical, which is mobile eyeglass, are risen
The effect of zoom in zooming procedure is arrived, moving curve is straight line, total shift motion 29.96mm.Compensation group L4 i.e. the 4th lens,
For lenticular positive lens, material is zinc selenide, the surface S8 be it is aspherical, which is mobile eyeglass, when zoom group eyeglass moves
When dynamic, compensation group eyeglass does corresponding movement to guarantee that image planes position is constant, and moving curve is 6 parabolas, always moves row
Journey 22.16mm.Focusing group L5 i.e. the 5th lens are falcate positive lens of the convex surface towards object space, and material is germanium single crystal, wherein S9
Face is diffraction surfaces, which is mobile eyeglass, and when target range changes and operating temperature changes, can use should
Eyeglass focuses again, total shift motion 2.29mm.It fixes in group afterwards, there are three lens, L6 i.e. the 6th lens are convex surface towards picture
The falcate positive lens of side, material are germanium single crystal, and L7 i.e. the 7th lens are negative meniscus of the convex surface towards image space, material
For germanium single crystal, the surface S13 is diffractive-aspherical, and L8 i.e. the 8th lens are concave-convex positive lens of the convex surface towards image space, and material is
Silicon single crystal；Medium wave refrigeration detector includes: protecting window 101, cold screen 102, diaphragm S17, imaging surface 10,3, and resolution ratio is
640x512,15 μm of Pixel size.
In above five lens, the first surface lens S1 coating diamond-like carbon film needs to plate eka-gold because this is surface exposed
Hard rock carbon film carbon film plays protective effect, and anti-reflection film is plated on remaining surface S2~S16.
Table 1 is Optic structure parameter of the utility model in focal length 300mm, 15mm:
Table 1
It refers to aspherical in above eight lens, is even aspheric surface, expression formula is as follows
Wherein z be it is aspherical along optical axis direction when being highly the position of r, away from aspheric vertex of surface apart from rise, c is indicated
The vertex curvature on surface, k are circular cone coefficient, α2、α3、α4、α5、α6For high order aspheric surface coefficient.
Table 2 be surface S4, S5, S8, the asphericity coefficient of S10, S13:
Table 2
| Surface | 4th | 6th | 8th | 10th | 12th |
| S4 | 3.488E-8 | -2.147E-12 | 2.925E-15 | -1.878E-18 | 4.396E-22 |
| S5 | 8.149E-6 | -2.369E-8 | 2.484E-10 | -1.685E-12 | 4.615E-15 |
| S8 | 6.403E-6 | -1.672E-8 | 1.599E-10 | -8.087E-13 | 1.65E-15 |
| S10 | 2.256E-5 | -2.02E-6 | 1.575E-7 | -5.135E-9 | 6.546E-11 |
| S13 | -1.342E-4 | 8.72E-7 | -1.264E-7 | 3.841E-9 | -5.529E-11 |
The diffraction surfaces referred in above five lens, expression formula are as follows:
Φ=A1ρ2+A2ρ4
Wherein Φ is the position phase of diffraction surfaces, ρ=r/rn,rnIt is the planning radius of diffraction surfaces, A1、A2For the position phase of diffraction surfaces
Coefficient.
Table 3 is the diffraction coefficient of surface S10, S13；
Table 3
| Surface | ||
| S10 | -35.446 | -6.782 |
| S13 | -59.337 | -1.684 |
Further detailed description is done referring to effect of the Aberration Analysis figure to the utility model.
Fig. 2-Fig. 4 is the specific embodiment of big zoom ratio medium-wave infrared refrigeration continuous magnification lens described in Fig. 1 in focal length
Aberration Analysis figure when state, it be MTF figure, Fig. 4 is curvature of field distortion figure that Fig. 2, which is point range figure, Fig. 3,.
Fig. 6-Fig. 8 is the specific embodiment of big zoom ratio medium-wave infrared refrigeration continuous magnification lens described in Fig. 5 in short focus
Aberration Analysis figure when state, it be MTF figure, Fig. 8 is curvature of field distortion figure that Fig. 6, which is point range figure, Fig. 7,.
It can be found that the various aberrations of each coke section have obtained good correction from figure, disc of confusion is corrected to close
Even less than Aili spot size, MTF is good, distortion < 5%.
Number=4 effective focal length EFL=15~300mm, F of the camera lens, optical system overall length=160mm, adaptation detection
Device resolution ratio 640x512,15 μm of Pixel size.The horizontal field of view angular region of the camera lens are as follows: 2w=35.5 °~1.8 °.
It can be seen that the big zoom ratio medium-wave infrared refrigeration continuous magnification lens of the utility model are with good at image quality
Amount.
Finally, it should be noted that above embodiments are only to illustrate the utility model and not limit the utility model and retouched
The technical solution stated.Therefore, although this specification has been carried out detailed description to the utility model referring to the above embodiments,
But those skilled in the art should understand that, it still can modify to the utility model or equivalent replacement；And one
The technical solution and its improvement for cutting the spirit and scope for not departing from the utility model, should all cover the right in the utility model
In claimed range.
Claims (7)
- The continuous magnification lens 1. a kind of big zoom ratio medium-wave infrared freezes, it is characterised in that: before successively including to image space by object space Fixed group, compensation group, focusing group, fixes group, diaphragm and explorer portion at zoom group afterwards；Fixed group has positive light coke before described, including a piece of convex surface in front towards the falcate silicon single crystal positive lens of object space, table Noodles type is spherical surface；And the germanium single crystal negative lens of falcate of a piece of convex surface in back towards object space, towards the side of image space It is aspherical；The zoom group have negative power, be a piece of double concave germanium single crystal negative lens, towards the side of object space be it is aspherical, Total shift motion 29.96mm of the lens；The compensation group have positive light coke, be a piece of lenticular zinc selenide positive lens, towards the side of image space be it is aspherical, Total shift motion 22.16mm of the lens；The focusing group has positive light coke, is falcate germanium single crystal positive lens of a piece of convex surface towards object space, and concave surface is to spread out Penetrate face, total shift motion 2.29mm of the lens；Fixed group has positive light coke after described, including a piece of convex surface in front towards the falcate germanium single crystal positive lens of image space, table Noodles type is spherical surface；Towards the falcate germanium single crystal negative lens of image space, concave surface is diffraction surfaces on intermediate a piece of convex surface；Next one Towards the falcate silicon single crystal positive lens of image space, surface type is spherical surface on piece convex surface；It is medium wave refrigeration detector part, including protecting window, cold screen, cold stop and image planes after the rear fixed group；Protection Window is located at compensation group rear surface, and cold screen is located at protecting window rear surface, and cold stop is located at cold screen rear surface, protects in zooming procedure It holds constant.
- The continuous magnification lens 2. big zoom ratio medium-wave infrared according to claim 1 freezes, which is characterized in that the camera lens Meet following parameter:Number=4 effective focal length EFL=15~300mm, F of the camera lens, optical system overall length=160mm, adaptation detector point Resolution 640x512,15 μm of Pixel size.
- The continuous magnification lens 3. big zoom ratio medium-wave infrared according to claim 1 freezes, which is characterized in that the camera lens Horizontal field of view angular region are as follows: 2w=35.5 °~1.8 °.
- The continuous magnification lens 4. big zoom ratio medium-wave infrared according to claim 1 freezes, which is characterized in that the camera lens Eyeglass in aspherical meet following expression formula:Wherein z be it is aspherical along optical axis direction when being highly the position of r, away from aspheric vertex of surface apart from rise, c indicates surface Vertex curvature, k is circular cone coefficient, α2、α3、α4、α5、α6For high order aspheric surface coefficient.
- The continuous magnification lens 5. big zoom ratio medium-wave infrared according to claim 1 freezes, which is characterized in that the camera lens Eyeglass in diffraction surfaces meet following expression formula:Φ=A1ρ2+A2ρ4Wherein Φ is the position phase of diffraction surfaces, ρ=r/rn,rnIt is the planning radius of diffraction surfaces, A1、A2For the phase coefficient of diffraction surfaces.
- The continuous magnification lens 6. big zoom ratio medium-wave infrared according to claim 1 freezes, which is characterized in that the first lens Surface coating diamond-like carbon film close to object side.
- The continuous magnification lens 7. big zoom ratio medium-wave infrared according to claim 1 freezes, which is characterized in that the camera lens Full filed the@of average MTF > 0.523 20lp/mm.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110673314A (en) * | 2019-09-29 | 2020-01-10 | 凯迈（洛阳）测控有限公司 | Negative compensation type large-target-surface medium-wave refrigeration infrared continuous zooming optical system |
| CN110850566A (en) * | 2019-11-09 | 2020-02-28 | 中国航空工业集团公司洛阳电光设备研究所 | Ultrashort 20-time medium wave continuous zoom lens without diffraction surface |
| CN112612129A (en) * | 2020-12-24 | 2021-04-06 | 西安中科立德红外科技有限公司 | Miniaturized medium-wave infrared refrigeration continuous zoom lens and optical system |
| CN112612128A (en) * | 2020-12-24 | 2021-04-06 | 西安中科立德红外科技有限公司 | Medium-wave infrared refrigeration continuous zoom lens with large target surface and small F number and optical system |
| CN114355594A (en) * | 2021-12-31 | 2022-04-15 | 福建福光股份有限公司 | Miniaturized medium-wave infrared zooming optical system |
| CN114460730A (en) * | 2022-01-25 | 2022-05-10 | 凯迈（洛阳）测控有限公司 | Ultra-small airborne medium wave refrigeration infrared continuous zooming optical system |
-
2018
- 2018-09-14 CN CN201821513144.7U patent/CN209167667U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110673314A (en) * | 2019-09-29 | 2020-01-10 | 凯迈（洛阳）测控有限公司 | Negative compensation type large-target-surface medium-wave refrigeration infrared continuous zooming optical system |
| CN110850566A (en) * | 2019-11-09 | 2020-02-28 | 中国航空工业集团公司洛阳电光设备研究所 | Ultrashort 20-time medium wave continuous zoom lens without diffraction surface |
| CN110850566B (en) * | 2019-11-09 | 2021-07-09 | 中国航空工业集团公司洛阳电光设备研究所 | Ultrashort 20-time medium wave continuous zoom lens without diffraction surface |
| CN112612129A (en) * | 2020-12-24 | 2021-04-06 | 西安中科立德红外科技有限公司 | Miniaturized medium-wave infrared refrigeration continuous zoom lens and optical system |
| CN112612128A (en) * | 2020-12-24 | 2021-04-06 | 西安中科立德红外科技有限公司 | Medium-wave infrared refrigeration continuous zoom lens with large target surface and small F number and optical system |
| CN112612129B (en) * | 2020-12-24 | 2021-11-26 | 西安中科立德红外科技有限公司 | Miniaturized medium-wave infrared refrigeration continuous zoom lens and optical system |
| CN114355594A (en) * | 2021-12-31 | 2022-04-15 | 福建福光股份有限公司 | Miniaturized medium-wave infrared zooming optical system |
| CN114460730A (en) * | 2022-01-25 | 2022-05-10 | 凯迈（洛阳）测控有限公司 | Ultra-small airborne medium wave refrigeration infrared continuous zooming optical system |
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Effective date of registration: 20210304 Address after: 065200 l03-g workshop in Baishi Jingu Yanjiao international industrial base, west of Yingbin North Road and north of Gushan West Road, Yanjiao Development Zone, Sanhe City, Langfang City, Hebei Province Patentee after: SANHE LENSTEC PHOTOELECTRIC TECHNOLOGY Co.,Ltd. Address before: 100016 courtyard 160, East Bajianfang village, Jiangtai Township, Chaoyang District, Beijing Patentee before: BEIJING LENSTECH SCIENCE & TECHNOLOGY Co.,Ltd. |
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Address after: 065200 l03-g workshop in Baishi Jingu Yanjiao international industrial base, west of Yingbin North Road and north of Gushan West Road, Yanjiao Development Zone, Sanhe City, Langfang City, Hebei Province Patentee after: Hebei Lansitek Optoelectronic Technology Co.,Ltd. Address before: 065200 l03-g workshop in Baishi Jingu Yanjiao international industrial base, west of Yingbin North Road and north of Gushan West Road, Yanjiao Development Zone, Sanhe City, Langfang City, Hebei Province Patentee before: SANHE LENSTEC PHOTOELECTRIC TECHNOLOGY CO.,LTD. |
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