CN110703421B - Variable-magnification-ratio adjustable compact medium-wave infrared continuous zoom lens - Google Patents
Variable-magnification-ratio adjustable compact medium-wave infrared continuous zoom lens Download PDFInfo
- Publication number
- CN110703421B CN110703421B CN201910874039.9A CN201910874039A CN110703421B CN 110703421 B CN110703421 B CN 110703421B CN 201910874039 A CN201910874039 A CN 201910874039A CN 110703421 B CN110703421 B CN 110703421B
- Authority
- CN
- China
- Prior art keywords
- lens
- lens group
- zoom
- positive
- positive meniscus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 51
- 230000005499 meniscus Effects 0.000 claims abstract description 33
- 238000003384 imaging method Methods 0.000 claims abstract description 24
- 229910052732 germanium Inorganic materials 0.000 claims description 6
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000005083 Zinc sulfide Substances 0.000 claims description 2
- 229910052984 zinc sulfide Inorganic materials 0.000 claims description 2
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 claims description 2
- 238000012546 transfer Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 5
- 238000005057 refrigeration Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
- G02B15/163—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
- G02B15/167—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/008—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras designed for infrared light
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Lenses (AREA)
Abstract
The invention relates to a zoom ratio adjustable compact medium wave infrared continuous zoom lens, which is sequentially provided with a beam expanding lens group, a front fixed lens group, a zoom lens group, a compensation lens group, a rear fixed lens group and a secondary imaging lens group along an optical axis; the beam expanding lens group consists of a first positive meniscus lens and a second positive meniscus lens with convex surfaces facing the object side; the front surface of the first positive meniscus lens is a sphere, the rear surface is a diffraction surface, the front surface of the second positive meniscus lens is a sphere, and the rear surface is an aspheric surface. The invention can continuously zoom in the focal length ranges of 21 mm-420 mm, 25 mm-500 mm, 50 mm-700 mm and the like, and has short zooming stroke and smooth curve.
Description
Technical Field
The invention belongs to the technical field of infrared continuous zooming optical systems, and relates to a zoom ratio adjustable compact medium-wave infrared continuous zooming lens.
Background
When the focal length of the infrared continuous zooming optical system is continuously changed within a certain range, the image plane is stable and good image quality can be maintained. The size of the image plane scenery is continuously variable, and the visual effect which cannot be achieved by the fixed focus lens and the multi-gear zoom lens can be achieved, so that the purpose of searching the target in a large view field and carefully observing the target in a small view field is achieved.
At present, domestic researches on a medium-wave infrared continuous zooming optical system have been reported. Chen Lvji 'compact medium wave infrared continuous zooming optical system design', and aiming at a refrigeration type 320 multiplied by 240 staring focal plane detector, 27.5 mm-458 mm continuous zooming is realized (infrared technology 2010, 32 (10)). For designs employing 640 x 512-element gaze focal plane array detectors, the literature is disclosed: the invention discloses a 'medium wave infrared continuous zoom lens' patent (application number: 201110193499.9) of eleventh research institute of China electronic technology group, which can be applied to a 640X 512 element 25 μm refrigeration type medium wave detector, has a focal length range of 50 mm-500 mm, a zoom ratio of 10 times and a moving lens group travel of 123mm maximum, but has the defects that: as the maximum travel of the moving group is too long, the switching time of the view field is increased, and the difficulty of ensuring the superposition accuracy of the wide view field and the narrow view field is increased. Chinese patent publication No. CN106526818 discloses a three-group linked compact high zoom ratio infrared contact zoom optical system. However, the system adopts a three-component zooming mode, so that the optical system has a complex structure and high control precision requirement.
In summary, the zoom ratio and focal length range of the common mid-wave infrared zoom lens are relatively single; the axial dimension is too long, the light path is usually required to be folded through a screen reflector, the space is large, and the practical use requirements of high zoom ratio and small dimension are difficult to meet; the three-component compact zoom lens has the problems of complex structure and the like. In addition, the optical materials adopted by the infrared lens are greatly influenced by temperature, and the optical parameters such as refractive index, thickness, curvature radius and the like of the optical materials can change along with the temperature, so that the focal plane is shifted, and the imaging quality is reduced. The temperature causes a particularly significant degradation in image quality when the lens is moved to the tele end. These problems limit the applicability and application range of the existing infrared zoom lens.
In addition, the development of the compact type athermal mid-wave infrared continuous zoom lens with the adjustable zoom ratio is a research purpose of the invention.
Disclosure of Invention
The invention aims to solve the technical problem of providing a zoom ratio adjustable compact medium wave infrared continuous zoom lens which can realize continuous zooming in the range of long focus, medium focus and short focus.
In order to solve the technical problems, the zoom ratio adjustable compact medium wave infrared continuous zoom lens is sequentially provided with a front fixed lens group, a zoom lens group, a compensation lens group, a rear fixed lens group and a secondary imaging lens group along an optical axis; the front fixed lens group is characterized in that a beam expander group is arranged in front of the front fixed lens group and along the optical axis; the beam expanding lens group consists of a first positive meniscus lens and a second positive meniscus lens with convex surfaces facing the object side; the front surface of the first positive meniscus lens is a sphere, the rear surface is a diffraction surface, the front surface of the second positive meniscus lens is a sphere, and the rear surface is an aspheric surface.
The front fixed lens group is a positive meniscus lens with a convex surface facing the object side; the zoom lens group is a biconcave negative lens; the compensating lens group is a biconvex positive lens; the rear fixed lens group is a positive meniscus lens with a convex surface facing the object side; the secondary imaging lens group is a positive lens with a convex surface facing the image side.
Further, the method comprises the steps of, the optical surface types of the lenses including the front fixed lens group, the zoom lens group, the compensation lens group, the rear fixed lens group and the secondary imaging lens group are sequentially spherical surfaces, diffraction surfaces, spherical surfaces, aspherical surfaces, spherical surfaces, aspherical surfaces, spherical surfaces, planes, spherical surfaces and diffraction surfaces along an optical axis.
The aspheric equation is
Wherein Z (h) is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at the position with the height h along the optical axis direction; c=1/r, r denotes the radius of curvature of the aspherical surface, k is a conic coefficient, A, B, C, D is a higher order aspherical coefficient;
The diffraction plane equation is:
φ(h)＝α1h2+α2h4+α3h6+...
Wherein phi (h) is the diffraction plane phase, alpha 1、α2、α3 … … is the diffraction coefficient, and h is the perpendicular distance from any point of the lens surface to the optical axis.
The incident light is imaged on the secondary image surface of the detector through the beam expanding lens group, the front fixed lens group zoom lens group, the compensating lens group, the rear fixed lens group and the secondary imaging lens group in sequence.
The first positive meniscus lens is made of silicon, and the second positive meniscus lens is made of zinc sulfide.
The front fixed lens group, the biconcave negative lens of the zoom lens group, the biconvex positive lens of the compensation lens group, the meniscus positive lens of the rear fixed lens group and the positive lens of the secondary imaging lens group are made of silicon, germanium, silicon, germanium and germanium respectively.
Setting the surface serial numbers of the optical surfaces of the lenses to be 1, 2 and … … along the optical axis, wherein the types and the structural parameters of the optical surfaces are shown in table 1, the higher-order aspheric coefficients of the aspheric surfaces are shown in table 2, and the diffraction coefficients of the diffraction surfaces are shown in table 3;
table 1 various optical surface types, structural parameters, and lens materials according to embodiments of the present invention:
table 2 shows the aspherical coefficients in the examples:
table 3 shows the diffraction plane coefficients in the examples:
The working wave band of the invention is 3.4-5.0 mu m, the cold diaphragm efficiency is 100%, the F number is constant and is 4.0, the invention can continuously zoom in the focal length range of 21-420 mm, 25-500 mm, 50-700 mm and the like, has good imaging quality in the whole focal range, and can be simultaneously adapted to various types of refrigeration medium wave infrared detectors with resolution ratio of 640 multiplied by 512, pixel size of 15 mu m, 20 mu m and the like. The invention can meet the requirements of different focal length ranges and different zoom ratios by only replacing the front-end beam expander lens group, and has short zooming stroke and smooth curve. The secondary imaging lens group is used for focusing and compensating focal plane drift in real time along with temperature change, and can realize athermalization at the temperature of-40 ℃ to 80 ℃. The technical scheme of the invention is practical and effective through optical design software CODEV and ZEMAX simulation.
Drawings
The invention is described in further detail below with reference to the drawings and the detailed description.
FIG. 1 is a light path diagram of a 420mm long focus of the present invention.
FIG. 2 is a 210mm mid-focal optical path of the present invention.
FIG. 3 is a 21mm short-focus optical path diagram of the present invention.
FIG. 4 is a graph of 420mm optical transfer function at 80 ℃.
FIG. 5 is a graph of the 210mm optical transfer function at 80 ℃.
FIG. 6 is a graph of 21mm optical transfer function at 80 ℃.
FIG. 7 is a graph of 420mm optical transfer function at 20 ℃.
FIG. 8 is a graph of the 210mm optical transfer function at 20 ℃.
FIG. 9 is a graph of 21mm optical transfer function at 20 ℃.
FIG. 10 is a graph of 420mm optical transfer function at-40 ℃.
FIG. 11 is a graph of the 210mm optical transfer function at-40 ℃.
FIG. 12 is a graph of 21mm optical transfer function at-40 ℃.
In the figure, 110, 111, 112, 120, front fixed lens group, 130, variable focus lens group, 140, compensating lens group, 150, rear fixed lens group, 155, primary image plane, 160, secondary imaging lens group, 170, detector, 171, detector protection window, 172, cold stop, secondary image plane 173.
Detailed Description
As shown in fig. 1,2 and 3, the zoom ratio-adjustable compact type medium wave infrared continuous zoom lens of the present invention is sequentially provided with a beam expander lens group 110, a front fixed lens group 120, a zoom lens group 130, a compensation lens group 140, a rear fixed lens group 150 and a secondary imaging lens group 160 along an optical axis; the beam expander group 110 is composed of a first positive meniscus lens 111 and a second positive meniscus lens 112 with convex surfaces facing the object side; the front surface of the first meniscus positive lens 111 is a spherical surface, the rear surface is a diffraction surface, the front surface of the second meniscus positive lens 112 is a spherical surface, and the rear surface is an aspherical surface; the front fixed lens group 120 is a meniscus positive lens with a convex surface facing the object side, the front surface is a sphere, and the rear surface is an aspheric surface; the zoom lens group 130 is a biconcave negative lens, the front surface of which is aspheric, and the rear surface of which is spherical; the compensation lens group 140 is a biconvex positive lens, the front surface of which is aspheric, and the rear surface of which is spherical; the rear fixed lens group 150 is a meniscus positive lens with a convex surface facing the object side, the front surface is an aspheric surface, and the rear surface is a spherical surface; the secondary imaging lens group 160 is a positive lens with a convex surface toward the image side, and has a spherical front surface and a diffraction surface on a rear surface. The detector 170 is disposed behind the secondary imaging lens group 160.
Wherein the equation of the aspheric surface is
Wherein Z (h) is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at the position with the height h along the optical axis direction; c=1/r, r denotes the radius of curvature of the aspherical surface, k is a conic coefficient (here, 0), A, B, C, D is a higher order aspherical coefficient.
The two diffraction planes satisfy the above aspheric equation, and also satisfy the following diffraction plane equation:
φ(h)＝α1h2+α2h4+α3h6+...
Wherein phi (h) is the diffraction plane phase, alpha 1、α2、α3 … … is the diffraction coefficient, and h is the perpendicular distance from any point of the lens surface to the optical axis.
The surface serial numbers of the optical surfaces of the lenses are sequentially 1,2 and … … along the optical axis, the types, the structural parameters and the lens materials of the optical surfaces are shown in table 1, the higher-order aspheric coefficients of the aspheric surfaces are shown in table 2, the diffraction coefficients of the diffraction surfaces are shown in table 3, and the effective focal length, F/#, the angle of view and the variable distances T1, T2 and T3 are shown in table 4.
Table 1 various optical surface types, structural parameters, and lens materials according to embodiments of the present invention:
Table 2 higher order aspheric coefficients for each aspheric surface of the inventive example:
Table 3 diffraction plane coefficients of the diffraction planes:
Note that: α 3＝0、α4 =0 … ….
TABLE 4 effective focal length, F/#, field angle, and variable spacing T1, T2, T3
Fig. 4-12 are modulation transfer function (Modulation Transfer Function) curves for the preferred embodiment of the present invention for the long, mid and short focal positions at 80 ℃,20 ℃ and-40 ℃. The horizontal axis in the figure represents the spatial sampling frequency of the detector in units of: wire pairs per millimeter (lp/mm); the vertical axis represents the value of the Modulation Transfer Function (MTF) used to evaluate the imaging quality of the lens, the range of values being 0 to 1.0, the higher the MTF curve the straighter the better the imaging quality of the lens, the stronger the reducing power on the real image. After the lens compensates focal plane drift, the lens component can be ensured to clearly image on the whole imaging plane in the environment of-40 ℃ to 80 ℃ so as to meet the requirement of eliminating heat difference.
The invention can meet the requirements of different focal length ranges and different zoom ratios by replacing the front-end beam expander lens group, and has short zooming stroke and smooth curve. The secondary imaging lens group is used for focusing and compensating focal plane drift in real time along with temperature change, and can realize athermalization at the temperature of-40-80 ℃, and the secondary imaging lens group is particularly shown in figures 4-12. The working wave band of the invention is 3.4-5.0 mu m, the cold diaphragm efficiency is 100%, the F number is constant and is 4.0, the invention can continuously zoom in the focal length range of 21-420 mm, 25-500 mm, 50-700 mm and the like, has good imaging quality in the whole focal range, and can be simultaneously adapted to various types of refrigeration medium wave infrared detectors with resolution ratio of 640 multiplied by 512, pixel size of 15 mu m, 20 mu m and the like.
The scheme is practical and effective through optical design software CODEV and ZEMAX simulation. The refractive optical system is adopted, and the scheme of adding the beam expander before the low-zoom-ratio infrared optical system can meet different zoom ranges and different zoom ratios by only replacing the beam expander.
Claims (4)
1. The zoom ratio adjustable compact medium wave infrared continuous zoom lens is characterized by comprising a beam expander group (110), a front fixed lens group (120), a zoom lens group (130), a compensation lens group (140), a rear fixed lens group (150) and a secondary imaging lens group (160) which are sequentially arranged along an optical axis; the beam expanding lens group (110) consists of a first positive meniscus lens (111) with a convex surface facing the object side and a second positive meniscus lens (112); the front surface of the first positive meniscus lens (111) is a spherical surface, the rear surface is a diffraction surface, the front surface of the second positive meniscus lens (112) is a spherical surface, and the rear surface is an aspheric surface; the front fixed lens group (120) is a positive meniscus lens with a convex surface facing the object side; the zoom lens group (130) is a biconcave negative lens; the compensating lens group (140) is a biconvex positive lens; the rear fixed lens group (150) is a positive meniscus lens with a convex surface facing the object side; the secondary imaging lens group (160) is a positive lens with a convex surface facing the image side; the optical surface types of the lenses in the front fixed lens group (120), the zoom lens group (130), the compensation lens group (140), the rear fixed lens group (150) and the secondary imaging lens group (160) are sequentially spherical surfaces, aspherical surfaces, spherical surfaces and diffraction surfaces along the optical axis; the curvature radius of each lens optical surface of the whole zoom lens along the optical axis direction is 72.661mm、75.134mm、120.393mm、90.986mm、84.157mm、184.006mm、-112.946mm、40.459mm、140.513mm、-76.997mm、10.269mm、8.035mm、106.024mm、-10.33mm,, and the distance between each lens optical surface and the next optical surface is 12.5mm, 31.744mm, 7.9mm, 9.94mm, 9mm, T1, 9mm, T2, 9mm, T3, 5mm, 19.38mm and 4mm in sequence; wherein T1, T2, T3 are variable intervals; the higher order aspheric coefficients A, B, C, D of the rear surface of the first meniscus positive lens are-2.68 e-08, -5.183e-12, 1.052e-15, -1.636e-19 respectively; the higher order aspherical coefficients A, B, C, D of the rear surface of the second meniscus positive lens are 4.58e-07, 4.0645e-11, -1.354e-13, 4.6447e-17, respectively; the higher order aspherical coefficients A, B, C, D of the rear surface of the meniscus positive lens of the front fixed lens group are-4.4 e-07, 2.9735e-10, 2.563e-14 and-4.024 e-17 respectively; the higher order aspheric coefficients A, B, C, D of the front surface of the biconcave negative lens of the zoom lens group are-1 e-05, -3.011e-08, 1.887e-10 and-2.19 e-13 respectively; the high order aspheric coefficients A, B, C, D of the biconvex positive lens front surface of the compensating lens group are-2.16 e-06, 1.644e-09, -1.628e-11 and 5.08e-14 respectively; the higher order aspherical coefficients A, B, C, D of the front surface of the meniscus positive lens of the rear fixed lens group are-1.39 e-05, 1.02e-07, -5.35e-09 and 3.314e-11 respectively; the higher order aspherical coefficients A, B, C, D of the positive lens rear surface of the secondary imaging lens group are 4.04e-05, -2.9e-07, 4.71e-09, -3.8e-11, respectively.
2. The zoom-ratio-adjustable compact medium-wave infrared continuous zoom lens according to claim 1, wherein the aspherical equation is
Wherein Z (h) is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at the position with the height h along the optical axis direction; c=1/r, r denotes the radius of curvature of the aspherical surface, k is a conic coefficient, A, B, C, D is a higher order aspherical coefficient;
The diffraction plane equation is:
φ(h)＝α1h2+α2h4+α3h6+...
Wherein phi (h) is the diffraction plane phase, alpha 1、α2、α3 … … is the diffraction coefficient, and h is the perpendicular distance from any point of the lens surface to the optical axis.
3. The zoom-ratio-adjustable compact type medium wave infrared continuous zoom lens as set forth in claim 1, wherein the first positive meniscus lens (111) is made of silicon, and the second positive meniscus lens (112) is made of zinc sulfide.
4. The zoom ratio-adjustable compact type medium wave infrared continuous zoom lens as set forth in claim 1, wherein the positive meniscus lens of the front fixed lens group (120), the negative biconcave lens of the zoom lens group (130), the biconvex positive lens of the compensation lens group (140), the positive meniscus lens of the rear fixed lens group (150) and the positive lens of the secondary imaging lens group (160) are made of silicon, germanium, silicon, germanium and germanium, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910874039.9A CN110703421B (en) | 2019-09-17 | 2019-09-17 | Variable-magnification-ratio adjustable compact medium-wave infrared continuous zoom lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910874039.9A CN110703421B (en) | 2019-09-17 | 2019-09-17 | Variable-magnification-ratio adjustable compact medium-wave infrared continuous zoom lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110703421A CN110703421A (en) | 2020-01-17 |
| CN110703421B true CN110703421B (en) | 2024-05-17 |
Family
ID=69195502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910874039.9A Active CN110703421B (en) | 2019-09-17 | 2019-09-17 | Variable-magnification-ratio adjustable compact medium-wave infrared continuous zoom lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110703421B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111399201B (en) * | 2020-03-18 | 2020-12-11 | 山东大学 | Zooming optical lens for linear array detector |
| CN111505801B (en) * | 2020-05-18 | 2021-09-14 | 吉林工程技术师范学院 | Medium wave infrared optical system |
| CN112872582A (en) * | 2020-12-29 | 2021-06-01 | 武汉华工激光工程有限责任公司 | Continuously adjustable large-size shaping system and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213822A (en) * | 2011-07-12 | 2011-10-12 | 中国电子科技集团公司第十一研究所 | Medium wave infrared continuous zoom lens |
| CN103197407A (en) * | 2012-11-25 | 2013-07-10 | 西南技术物理研究所 | Common optical path dual-band confocal plane zoom optical system |
| CN103389570A (en) * | 2013-07-23 | 2013-11-13 | 中国科学院长春光学精密机械与物理研究所 | Medium wave infrared continuous zooming optical system with high zoom ratio |
| CN107907978A (en) * | 2017-11-13 | 2018-04-13 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of band times mirror minimizes infrared continuous zooming optical system |
| CN109188662A (en) * | 2018-10-18 | 2019-01-11 | 中国科学院西安光学精密机械研究所 | A kind of optical compensation refrigeration mode Middle infrared continuous zoom optical system |
| CN210442569U (en) * | 2019-09-17 | 2020-05-01 | 长春长光智欧科技有限公司 | Compact medium wave infrared continuous zoom lens with adjustable zoom ratio |
-
2019
- 2019-09-17 CN CN201910874039.9A patent/CN110703421B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213822A (en) * | 2011-07-12 | 2011-10-12 | 中国电子科技集团公司第十一研究所 | Medium wave infrared continuous zoom lens |
| CN103197407A (en) * | 2012-11-25 | 2013-07-10 | 西南技术物理研究所 | Common optical path dual-band confocal plane zoom optical system |
| CN103389570A (en) * | 2013-07-23 | 2013-11-13 | 中国科学院长春光学精密机械与物理研究所 | Medium wave infrared continuous zooming optical system with high zoom ratio |
| CN107907978A (en) * | 2017-11-13 | 2018-04-13 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of band times mirror minimizes infrared continuous zooming optical system |
| CN109188662A (en) * | 2018-10-18 | 2019-01-11 | 中国科学院西安光学精密机械研究所 | A kind of optical compensation refrigeration mode Middle infrared continuous zoom optical system |
| CN210442569U (en) * | 2019-09-17 | 2020-05-01 | 长春长光智欧科技有限公司 | Compact medium wave infrared continuous zoom lens with adjustable zoom ratio |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110703421A (en) | 2020-01-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111367063B (en) | Medium-wave infrared continuous zoom lens and imaging device | |
| CN110703421B (en) | Variable-magnification-ratio adjustable compact medium-wave infrared continuous zoom lens | |
| CN210090810U (en) | Economical medium-wave infrared refrigeration continuous zoom lens | |
| CN109541788B (en) | Uncooled continuous zooming optical passive athermalization lens | |
| CN209198755U (en) | A kind of short-wave infrared continuous magnification lens | |
| CN104049343A (en) | Compact type double-view-field medium wave infrared athermalization lens | |
| CN109387931B (en) | Short wave infrared continuous zoom lens | |
| CN109143555B (en) | Zoom lens | |
| CN210090814U (en) | Long-focus medium-wave infrared refrigeration double-view-field lens | |
| CN110716297B (en) | Long-focus large-target-surface infrared continuous zooming optical system | |
| CN210090813U (en) | Economical thermal imaging continuous zoom lens | |
| CN212569271U (en) | Light and small medium-wave infrared refrigeration continuous zoom lens | |
| CN106338816B (en) | A kind of ultra high-definition wide-angle zoom optic system | |
| CN112305732A (en) | Ultra-long focal length high-resolution continuous zooming medium-wave infrared optical system | |
| CN216133244U (en) | High-zoom-ratio long-wave infrared continuous zoom lens | |
| CN114460728B (en) | Microminiature medium wave refrigerating infrared continuous zooming optical system | |
| CN210442569U (en) | Compact medium wave infrared continuous zoom lens with adjustable zoom ratio | |
| CN214252721U (en) | Ultra-long focal length medium wave infrared optical system | |
| CN110716296B (en) | Large-target-surface miniaturized uncooled infrared continuous zooming optical system | |
| CN211061769U (en) | Three-guide-rail medium-wave infrared refrigeration continuous zoom lens with large zoom ratio | |
| CN210090812U (en) | Folding type light path long wave infrared refrigeration double-view-field lens | |
| CN114252982A (en) | Thermal difference elimination infrared lens with focal length of 35mm, assembling method thereof and imaging method | |
| CN107255860B (en) | Inner focusing formula suitable for sealing device is without thermalization long-wave infrared continuous zoom lens | |
| CN216285938U (en) | Miniaturized large-zoom-ratio medium-wave infrared continuous zoom lens | |
| CN115128786B (en) | Large-zoom-ratio high-resolution long-wave infrared continuous zooming optical system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |