CN114236787A - Thermal difference eliminating infrared lens with focal length of 150mm and assembling method thereof - Google Patents
Thermal difference eliminating infrared lens with focal length of 150mm and assembling method thereof Download PDFInfo
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- CN114236787A CN114236787A CN202111636404.6A CN202111636404A CN114236787A CN 114236787 A CN114236787 A CN 114236787A CN 202111636404 A CN202111636404 A CN 202111636404A CN 114236787 A CN114236787 A CN 114236787A
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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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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/021—Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
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Abstract
The invention discloses a thermal difference elimination infrared lens with a focal length of 150mm and an assembly method thereof. The lens comprises a lens barrel and a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are coaxially arranged in the lens barrel from left to right in sequence along the light transmission direction; the first lens, the second lens and the third lens are meniscus lenses with convex surfaces facing an object space, the fourth lens is a meniscus lens with a convex surface facing an image space, and the fifth lens is a biconvex lens; the focal powers of the first lens, the second lens, the third lens, the fourth lens and the fifth lens are respectively positive, negative, positive, negative and positive. The infrared lens for eliminating the thermal difference can achieve good optical passive thermal difference elimination effect through reasonable focal power proportion and lens materials, has good imaging effect in a temperature range of 8-12 mu m wave band and-40 ℃ to 60 ℃, and is particularly suitable for 640x512 and 15 mu m type detectors.
Description
Technical Field
The invention belongs to the technical field of optical lenses, and relates to a thermal difference elimination infrared lens with a focal length of 150mm and an assembly method thereof.
Background
With the development of science and technology, infrared imaging technology has been widely applied in the fields of national defense, industry, medical treatment and the like. The infrared detection has certain capabilities of penetrating smoke, fog, haze, snow and the like and recognizing camouflage, is not interfered by battlefield strong light and flash light to cause blindness, can realize remote and all-weather observation, and is particularly suitable for target detection at night and under adverse weather conditions. However, in the application of infrared imaging, the temperature of the external environment may affect the refractive index of the lens material, and may also cause thermal expansion and cold contraction to the lens barrel material, so that the focal power changes and the optimal image plane shifts, the image is blurred, the contrast ratio is reduced, the optical imaging quality is reduced, and the imaging performance of the lens is finally affected. Therefore, the infrared optical system is required not to generate image plane drift when working in a wide temperature range, and the optical system has good imaging quality in a larger range by adopting the heat difference eliminating technology.
The optical athermal technology mainly comprises the following steps: electromechanical active, mechanical passive, and optical passive. The first two approaches can complicate the system, increase its volume and weight. Optical passive systems often have a large number of lenses, complex structures, or introduce diffractive surfaces that significantly reduce the transmittance of the optical system in order to achieve a wider range of operating temperatures.
Modulation Transfer Function (Modulation Transfer Function) is a scientific method for analyzing the resolution of the lens.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides the heat difference eliminating infrared lens which can effectively overcome the problem of poor imaging performance caused by external temperature fluctuation, and has the advantages of less lenses, high optical transmittance and simple structure while meeting the requirement of a wide working temperature range. The specific technical scheme is as follows.
Compared with the prior art, the invention has the beneficial effects that:
a thermal difference elimination infrared lens with a focal length of 150mm comprises a lens barrel, and a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are coaxially arranged in the lens barrel from left to right in sequence along a light transmission direction; the first lens, the second lens and the third lens are meniscus lenses with convex surfaces facing an object space, the fourth lens is a meniscus lens with a convex surface facing an image space, and the fifth lens is a biconvex lens; the focal powers of the first lens, the second lens, the third lens, the fourth lens and the fifth lens are respectively positive, negative, positive, negative and positive.
Preferably, the first lens and the fifth lens are made of silicon; the material of the second lens adopts germanium; the third lens is made of zinc sulfide; the fourth lens is made of chalcogenide glass.
Preferably, none of the first lens, the second lens, the third lens, the fourth lens and the fifth lens includes a diffraction surface.
Preferably, the light emitting side of the second lens is aspheric, both the light incident side and the light emitting side of the third lens are aspheric, and the light emitting side of the fifth lens is aspheric.
Preferably, the air space between the first lens and the second lens is 0.53mm, the air space between the second lens and the third lens is 32.09mm, and the air space between the third lens and the fourth lens is 20.3 mm; the air space between the fourth lens and the fifth lens is 0.5 mm.
Preferably, the center thickness of the first lens is 5.5mm, the center thickness of the second lens is 2.5mm, the center thickness of the third lens is 7.9mm, the center thickness of the fourth lens is 2.7mm, and the center thickness of the fifth lens is 3 mm.
Preferably, the fitting curvature radius of the first lens along the light transmission direction on the light incidence side is 53mm, and the fitting curvature radius of the first lens along the light transmission direction on the light emergence side is 278.2 mm; the fitting curvature radius of the light incidence side of the second lens along the light transmission direction is 278.25mm, and the fitting curvature radius of the light emergence side of the second lens is 74.57 mm; the fitting curvature radius of the third lens along the light incidence side in the light transmission direction is 11.99mm, and the fitting curvature radius of the third lens along the light emergence side is 7.81 mm; the fitting curvature radius of the fourth lens along the light incidence side in the light transmission direction is-9.44 mm, and the fitting curvature radius of the fourth lens along the light emergent side is-10.79 mm; the fitting curvature radius of the fifth lens along the light ray transmission direction on the light ray incidence side is 39.09mm, and the fitting curvature radius of the fifth lens on the light ray emergence side is-43.38 mm.
Preferably, a first pressing ring is arranged on the inner circumferential surface of the lens barrel on the light incidence side of the first lens; a first space ring is arranged between the first lens and the second lens; a second pressing ring is arranged on the inner circumferential surface of the lens barrel on the light incidence side of the third lens; a second space ring is arranged between the fourth lens and the fifth lens; and a third pressing ring is arranged on the light ray emergent side of the fifth lens.
Preferably, on the light exit side of the second lens, a first annular step for positioning the image side surface of the second lens is arranged on the inner circumferential surface of the lens barrel; a second annular step for positioning the image side surface of the third lens is arranged on the inner circumferential surface of the lens barrel on the light ray emergent side of the third lens; and a third annular step for positioning the object side surface of the fourth lens is arranged on the inner circumferential surface of the lens barrel on the light incidence side of the fourth lens.
Another object of the present invention is to provide an assembling method of a thermal difference elimination infrared lens with a focal length of 150mm, which applies the thermal difference elimination infrared lens with a focal length of 150mm, and includes the steps of:
the fifth lens, the fourth lens, the third lens, the second lens and the first lens are arranged in the inner cavity of the lens barrel;
a first pressing ring is arranged between the first lens and the inner circumferential surface of the lens barrel on the light incidence side of the first lens to position the first lens;
disposing a first spacer between the first lens and the second lens to position the second lens;
a second pressing ring is arranged between the third lens and the inner circumferential surface of the lens barrel on the light incidence side of the third lens to position the third lens;
disposing a second spacer between the fourth lens and the fifth lens to position the fourth lens;
and a third pressing ring is arranged on the rear end surface of the lens barrel on the light ray emergent side of the fifth lens to position the fifth lens.
The infrared lens for eliminating the thermal difference provided by the invention applies an optical passive compensation technology, and the lens can keep the imaging consistency in a working environment with wide temperature fluctuation by adopting a five-piece lens structure through reasonable focal power proportion and lens materials, so that a good optical passive thermal difference eliminating effect can be achieved. Has good imaging effect in the temperature range of-40 ℃ to 60 ℃ in the wave band of 8-12 microns, and is particularly suitable for 640x512 and 15 mu m type detectors. And the lenses do not contain diffraction surfaces, so that the optical system is ensured to have good transmittance.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a lens dimension diagram of an infrared lens with heat dissipation differences in accordance with an embodiment of the present invention;
FIG. 2 is a perspective cross-sectional view of a lens of an infrared lens for reducing thermal differentials in accordance with an embodiment of the present invention;
FIG. 3 is a sectional view of a lens assembly of an infrared lens for reducing thermal difference in accordance with an embodiment of the present invention;
FIG. 4 is an MTF diagram of an athermal infrared lens operating at 20 ℃ in accordance with an embodiment of the present invention;
FIG. 5 is an MTF graph of a athermal infrared lens operating at-40 ℃ in accordance with an embodiment of the present invention;
fig. 6 is an MTF graph of the athermal infrared lens in a 60 ℃ operating environment in accordance with an embodiment of the present invention.
1. A lens barrel; 2. a first clamping ring; 3. a first lens; 4. a first space ring; 5. a second lens; 6. a second clamping ring; 7. a third lens; 8. a fourth lens; 9. a second space ring; 10. a fifth lens; 11. a third clamping ring; 12. a protection window; 13. a chopping window; 14. cooling the screen; 15. the outer detector focal plane array FPA.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment provides the athermal infrared lens with the focal length of 150 mm. As shown in fig. 1 to 3, the lens includes a first lens 3, a second lens 5, a third lens 7, a fourth lens 8, and a fifth lens 10 coaxially arranged in sequence along the light transmission direction; the first lens element 3, the second lens element 5 and the third lens element 7 are meniscus lenses with convex surfaces facing the object, the fourth lens element 8 is a meniscus lens with a convex surface facing the image, and the fifth lens element 10 is a biconvex lens; the focal powers of the first lens 3, the second lens 6, the third lens 7, the fourth lens 8 and the fifth lens 10 are respectively positive, negative, positive, negative and positive.
It is understood that the object side is the light incident side direction, and the image side is the light exiting side direction.
Light rays sequentially pass through the first lens 3, the second lens 5, the third lens 7, the fourth lens 8 and the fifth lens 10 from left to right, then pass through the protection window 12, the chopping window 13 and the cold screen 14, and are imaged on the infrared detector focal plane array FPA 15.
Specific parameters of each lens are shown in table 1.
The center thickness of the first lens 3 was 5.5mm, the fitting radius of curvature of the first lens 3 on the light incident side in the light transmission direction was 53mm, and the fitting radius of curvature of the light exiting side was 278.2 mm. The center thickness of the second lens 5 is 2.5mm, the fitting curvature radius of the second lens 5 along the light transmission direction on the light incident side is 278.25mm, and the fitting curvature radius of the second lens 5 along the light emergent side is 74.57 mm. The center thickness of the third lens 7 is 7.9mm, the fitting curvature radius of the third lens 7 on the light incidence side in the light transmission direction is 11.99mm, and the fitting curvature radius of the third lens on the light emergence side is 7.81 mm. The center thickness of the fourth lens 8 is 2.7mm, the fitting curvature radius of the fourth lens 8 along the light incidence side in the light transmission direction is-9.44 mm, and the fitting curvature radius of the fourth lens 8 along the light emergence side is-10.79 mm. The center thickness of the fifth lens 10 is 3mm, the fitting radius of curvature of the fifth lens 10 along the light transmission direction on the light incident side is 39.09mm, and the fitting radius of curvature of the light exiting side is-43.38 mm.
The air space between the first lens 3 and the second lens 5 is 0.53mm, the air space between the second lens 5 and the third lens 7 is 32.09mm, and the air space between the third lens 7 and the fourth lens 8 is 20.3 mm; the air gap between the fourth lens 8 and the fifth lens 10 is 0.5 mm.
TABLE 1 lens parameters
As shown in tables 2 to 4, the light exit side S4 of the second lens 5 is aspheric, the light entrance side S5 and the light exit side S6 of the third lens 7 are both aspheric, and the light exit side S10 of the fifth lens 10 is aspheric. And satisfies the formula:
wherein Z is the distance rise from the vertex of the aspheric surface when the aspheric surface is at the position of the height r along the optical axis direction; c = 1/R; r is the paraxial curvature fitting radius of the mirror surface; k is a conic coefficient; a, B, C, D and E are high-order aspheric coefficients.
TABLE 2 second lens 5 aspherical surface coefficient data
Table 3 third lens 7 aspherical surface coefficient data
TABLE 4 fifth lens 10 aspherical surface coefficient data
As shown in fig. 3, on the light incident side of the first lens 3, the inner peripheral surface of the lens barrel 1 is provided with a first pressing ring 3; a first space ring 4 is arranged between the first lens 3 and the second lens 5; a second pressing ring 6 is arranged on the inner circumferential surface of the lens barrel 1 on the light incidence side of the third lens 7; a second space ring 9 is arranged between the fourth lens 8 and the fifth lens 10; a third pressing ring 11 is provided on the light exit side of the fifth lens 10. A first annular step for positioning the image side surface of the second lens 5 is arranged on the inner circumferential surface of the lens barrel 1 at the light ray outgoing side of the second lens 3; a second annular step for positioning the image side surface of the third lens 7 is arranged on the inner circumferential surface of the lens barrel 1 at the light ray outgoing side of the third lens 7; on the light incident side of the fourth lens 8, the inner peripheral surface of the lens barrel 1 is provided with a third annular step that positions the object-side surface of the fourth lens 8.
The infrared lens with the thermal difference elimination in the embodiment is installed and fixed in the lens barrel, and the fifth lens 10, the fourth lens 8, the third lens 7, the second lens 5 and the first lens 3 are arranged in the inner cavity of the lens barrel 1; a first pressing ring 2 is provided between the first lens 3 and the inner peripheral surface of the lens barrel 1 on the light incident side of the first lens 3 to position the first lens 3; disposing a first spacer 4 between the first lens 3 and the second lens 5 to position the second lens 5; a second pressing ring 6 is provided between the third lens 7 and the inner peripheral surface of the lens barrel 1 on the light incident side of the third lens 7 to position the third lens 7; a second spacer 9 is provided between the fourth lens 8 and the fifth lens 10 to position the fourth lens 8; on the light exit side of the fifth lens 10, a third pressing ring 11 is provided on the rear end face of the lens barrel 1 to position the fifth lens 10.
The position distribution and design of the pressing ring, the spacing ring and the annular step ensure the concentricity, the precision and the accuracy of the axial position of the lens, and the structure of the lens is simple and convenient to mount as much as possible.
In a specific embodiment, the front end diameter of the athermal infrared lens can be 49 mm.
The MTF graphs of the athermal infrared lens in the present embodiment in the working environment of 20 ℃, -40 ℃, and 60 ℃ are shown in fig. 4 to 6, respectively. In summary, the thermal difference elimination infrared lens composed of the above lenses provided by the present embodiment achieves the following optical indexes.
The working wave band is as follows: 8-12 μm;
focal length: f' =150 mm;
resolution ratio: 640x 51215 μm;
f number: 4;
horizontal field angle: 3.67 °, vertical field angle: 2.93 degrees;
temperature range: -40 ℃ to 60 ℃.
In this embodiment, the lens system adopts five lenses, the lens material adopts the material matching of silicon-germanium-zinc sulfide-chalcogenide glass-silicon, reasonable power matching is designed, the purpose of eliminating temperature as much as possible to change the position of the image plane of the optical system can be achieved, and the lens can obtain a high-quality imaging image by combining the aspheric design. The lenses in this embodiment do not include diffractive surfaces, maintaining excellent optical transmittance. And the structure is simple, the weight is light, and the assembly is convenient. The lens of the embodiment is suitable for a detector with the pixel number of 640x512 and the pixel size of 15 mu m.
It should be understood that the above examples are only for clearly illustrating the technical solutions of the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection of the claims of the present invention.
Claims (10)
1. The thermal difference eliminating infrared lens with the focal length of 150mm is characterized by comprising a lens barrel, and a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are coaxially arranged in the lens barrel from left to right in sequence along the light transmission direction; the first lens, the second lens and the third lens are meniscus lenses with convex surfaces facing an object space, the fourth lens is a meniscus lens with a convex surface facing an image space, and the fifth lens is a biconvex lens; the focal powers of the first lens, the second lens, the third lens, the fourth lens and the fifth lens are respectively positive, negative, positive, negative and positive.
2. The athermal infrared lens with focal length of 150mm as claimed in claim 1, wherein the first lens and the fifth lens are made of silicon; the material of the second lens adopts germanium; the third lens is made of zinc sulfide; the fourth lens is made of chalcogenide glass.
3. An athermal infrared lens having a focal length of 150mm as claimed in claim 1, wherein none of said first lens, said second lens, said third lens, said fourth lens, and said fifth lens comprise a diffractive surface.
4. An athermal infrared lens having a focal length of 150mm as claimed in claim 1, wherein the light exit side of said second lens is aspheric, both the light entrance side and the light exit side of the third lens are aspheric, and the light exit side of said fifth lens is aspheric.
5. An athermal infrared lens having a focal length of 150mm as claimed in claim 1, wherein the air space between said first lens and said second lens is 0.53mm, the air space between said second lens and said third lens is 32.09mm, and the air space between said third lens and said fourth lens is 20.3 mm; the air space between the fourth lens and the fifth lens is 0.5 mm.
6. An athermal infrared lens having a focal length of 150mm as claimed in claim 1, wherein said first lens has a central thickness of 5.5mm, said second lens has a central thickness of 2.5mm, said third lens has a central thickness of 7.9mm, said fourth lens has a central thickness of 2.7mm, and said fifth lens has a central thickness of 3 mm.
7. The athermal infrared lens having a focal length of 150mm as claimed in claim 1, wherein the first lens has a fitting curvature radius of 53mm on a light incident side and 278.2mm on a light emergent side along a light transmission direction; the fitting curvature radius of the light incidence side of the second lens along the light transmission direction is 278.25mm, and the fitting curvature radius of the light emergence side of the second lens is 74.57 mm; the fitting curvature radius of the third lens along the light incidence side in the light transmission direction is 11.99mm, and the fitting curvature radius of the third lens along the light emergence side is 7.81 mm; the fitting curvature radius of the fourth lens along the light incidence side in the light transmission direction is-9.44 mm, and the fitting curvature radius of the fourth lens along the light emergent side is-10.79 mm; the fitting curvature radius of the fifth lens along the light ray transmission direction on the light ray incidence side is 39.09mm, and the fitting curvature radius of the fifth lens on the light ray emergence side is-43.38 mm.
8. The athermal infrared lens with focal length of 150mm as claimed in any one of claims 1 to 7, wherein a first pressing ring is arranged on the inner peripheral surface of the lens barrel on the light incidence side of the first lens; a first space ring is arranged between the first lens and the second lens; a second pressing ring is arranged on the inner circumferential surface of the lens barrel on the light incidence side of the third lens; a second space ring is arranged between the fourth lens and the fifth lens; and a third pressing ring is arranged on the light ray emergent side of the fifth lens.
9. The athermal infrared lens with focal length of 150mm as claimed in claim 8, wherein a first annular step for positioning the image side surface of the second lens is provided on the inner peripheral surface of the lens barrel on the light exit side of the second lens; a second annular step for positioning the image side surface of the third lens is arranged on the inner circumferential surface of the lens barrel on the light ray emergent side of the third lens; and a third annular step for positioning the object side surface of the fourth lens is arranged on the inner circumferential surface of the lens barrel on the light incidence side of the fourth lens.
10. A method for assembling a focal length 150mm athermal infrared lens, wherein the focal length 150mm athermal infrared lens of claim 8 is used, comprising the steps of:
the fifth lens, the fourth lens, the third lens, the second lens and the first lens are arranged in the inner cavity of the lens barrel;
a first pressing ring is arranged between the first lens and the inner circumferential surface of the lens barrel on the light incidence side of the first lens to position the first lens;
disposing a first spacer between the first lens and the second lens to position the second lens;
a second pressing ring is arranged between the third lens and the inner circumferential surface of the lens barrel on the light incidence side of the third lens to position the third lens;
disposing a second spacer between the fourth lens and the fifth lens to position the fourth lens;
and a third pressing ring is arranged on the rear end surface of the lens barrel on the light ray emergent side of the fifth lens to position the fifth lens.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119758559A (en) * | 2024-12-26 | 2025-04-04 | 安徽光智科技有限公司 | A medium- and long-wave dual-color composite infrared lens |
| EP4711831A1 (en) * | 2024-09-13 | 2026-03-18 | OroraTech GmbH | Lens arrangement and imaging device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140063596A1 (en) * | 2012-09-05 | 2014-03-06 | Pil Sun Jung | Photographing lens optical system |
| CN103837963A (en) * | 2014-01-24 | 2014-06-04 | 宁波舜宇红外技术有限公司 | Novel long-wave infrared athermalization camera lens with high light flux |
| CN204086666U (en) * | 2014-06-09 | 2015-01-07 | 宁波大学 | A kind of infrared on-vehicle lens applying chalcogenide glass |
| CN107479171A (en) * | 2017-08-29 | 2017-12-15 | 宁波舜宇红外技术有限公司 | Long wave infrared zoom lens |
| CN110632738A (en) * | 2019-08-19 | 2019-12-31 | 成都浩孚科技有限公司 | Large-caliber long-wave infrared optical system |
| CN112882210A (en) * | 2021-02-02 | 2021-06-01 | 昆明云锗高新技术有限公司 | Non-refrigeration medium-long wave broadband confocal infrared optical system |
-
2021
- 2021-12-30 CN CN202111636404.6A patent/CN114236787A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140063596A1 (en) * | 2012-09-05 | 2014-03-06 | Pil Sun Jung | Photographing lens optical system |
| CN103837963A (en) * | 2014-01-24 | 2014-06-04 | 宁波舜宇红外技术有限公司 | Novel long-wave infrared athermalization camera lens with high light flux |
| CN204086666U (en) * | 2014-06-09 | 2015-01-07 | 宁波大学 | A kind of infrared on-vehicle lens applying chalcogenide glass |
| CN107479171A (en) * | 2017-08-29 | 2017-12-15 | 宁波舜宇红外技术有限公司 | Long wave infrared zoom lens |
| CN110632738A (en) * | 2019-08-19 | 2019-12-31 | 成都浩孚科技有限公司 | Large-caliber long-wave infrared optical system |
| CN112882210A (en) * | 2021-02-02 | 2021-06-01 | 昆明云锗高新技术有限公司 | Non-refrigeration medium-long wave broadband confocal infrared optical system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4711831A1 (en) * | 2024-09-13 | 2026-03-18 | OroraTech GmbH | Lens arrangement and imaging device |
| CN119758559A (en) * | 2024-12-26 | 2025-04-04 | 安徽光智科技有限公司 | A medium- and long-wave dual-color composite infrared lens |
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Application publication date: 20220325 |