CN110850573A - Visible light, infrared dual-waveband of shortwave share aperture long focus optical system - Google Patents
Visible light, infrared dual-waveband of shortwave share aperture long focus optical system Download PDFInfo
- Publication number
- CN110850573A CN110850573A CN201911114436.2A CN201911114436A CN110850573A CN 110850573 A CN110850573 A CN 110850573A CN 201911114436 A CN201911114436 A CN 201911114436A CN 110850573 A CN110850573 A CN 110850573A
- Authority
- CN
- China
- Prior art keywords
- visible light
- lens group
- lens
- short wave
- infrared
- 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.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/08—Catadioptric systems
- G02B17/0896—Catadioptric systems with variable magnification or multiple imaging planes, including multispectral systems
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
- Telescopes (AREA)
Abstract
The invention relates to a visible light and short wave infrared dual-waveband hole-shared long-focus optical system, which comprises a common lens group A, a beam splitter prism B, a visible light lens group C and a short wave infrared lens group D, wherein the common lens group A and the beam splitter prism B are arranged from left to right along an incident light path, the beam splitter prism B divides emergent light from the common lens group A into two paths, the two paths of emergent light are imaged through the visible light lens group C and the short wave infrared lens group D respectively, and the common lens group A, the beam splitter prism B and the visible light lens group C form a visible light path; the common mirror group A, the beam splitter prism B and the short wave infrared mirror group D form a short wave infrared light path. The optical system has a compact structure, can simultaneously perform visible light and short wave infrared dual-band imaging on a target respectively, has the same relative aperture and focal length of two band light paths, and can realize all-weather long-distance target high-resolution imaging.
Description
The technical field is as follows:
the invention belongs to the technical field of photoelectricity, and particularly relates to a visible light and short wave infrared dual-waveband hole-diameter-shared long-focus optical system.
Background art:
the airborne photoelectric equipment performs imaging reconnaissance on the ground and the sea and plays an important role in searching, identifying and tracking targets. With the development of various camouflage technologies, the difficulty of target reconnaissance and identification is increased, and the imaging reconnaissance of a single waveband is difficult to meet the complex battlefield environment. In order to meet different environments and simultaneously realize all-weather reconnaissance, a visible light and infrared dual-band optical system is generally adopted at present.
The visible light imaging technology is mature, high-resolution detection can be realized, but the visible light imaging technology is easily influenced by severe weather and is not suitable for low-light-level environments such as night and the like; the infrared thermal imaging technology carries out target identification through the infrared radiation characteristic of the detected target, has the advantages of anti-interference performance, all-weather detection and the like, but the imaging picture is an infrared radiation image, has a large difference with the visual perception of human eyes, is easy to influence the identification of the target, most infrared materials are expensive in cost, and the infrared detector needs to be cooled so that the whole size of the system is enlarged.
The short wave infrared imaging is similar to the gray level image characteristics of visible light, the imaging contrast is high, the target detail expression is clear, and the short wave infrared imaging is an important supplement of the infrared thermal imaging technology in the aspect of target identification. Under the night vision condition of atmospheric glow, photon irradiance is mainly distributed in a short-wave infrared band range of 1.0-1.8 mu m, so that short-wave infrared night vision imaging has remarkable congenital advantages, and the short-wave infrared imaging is little influenced by atmospheric scattering, has stronger fog penetration, mist and dust capabilities, has long effective detection distance and obviously better adaptability to climatic conditions and battlefield environment than visible light imaging. Within the wave band of 0.9-1.7 μm, the military laser light source technology is mature, so that the short-wave infrared InGaAs focal plane imaging has obvious contrast advantage in the application of covert active imaging. In conclusion, visible light/short wave infrared dual-waveband imaging has wide application prospect in military fields such as aviation reconnaissance and the like.
The invention content is as follows:
the invention aims to provide a visible light and short wave infrared dual-waveband common-aperture long-focus optical system which is compact and reasonable in structure and can simultaneously perform visible light and short wave infrared dual-waveband imaging on a target.
In order to achieve the purpose, the invention adopts the technical scheme that: a visible light and shortwave infrared dual-waveband hole-shared long-focus optical system comprises a common lens group A, a beam splitter prism B, a visible light lens group C and a shortwave infrared lens group D, wherein the common lens group A and the beam splitter prism B are arranged from left to right along an incident light path, the beam splitter prism B divides emergent light from the common lens group A into two paths, the two paths of light paths are imaged through the visible light lens group C and the shortwave infrared lens group D respectively, and the common lens group A, the beam splitter prism B and the visible light lens group C form a visible light path; the common mirror group A, the beam splitter prism B and the short wave infrared mirror group D form a short wave infrared light path.
Further, the visible light path and the short wave infrared path have the same relative aperture and focal length.
Further, the common mirror group a comprises a secondary mirror a2 and a primary mirror a1 which are arranged from left to right in sequence; the visible light mirror group C is positioned at the rear side of the beam splitter B and comprises a positive crescent lens C1, a positive crescent lens C2, a negative crescent lens C3 and a visible light color filter C4 which are sequentially arranged from left to right; the short wave infrared lens group D is positioned on the upper side of the beam splitter B and comprises a reflector D1, a negative crescent lens D2, a positive crescent lens D3, a double convex lens D4 and a short wave infrared filter D5 which are sequentially arranged from left to right.
Further, the reflecting surface of the main mirror a1 is a quadratic surface with an opening at the center, and the reflecting surface of the sub mirror a2 is a quadratic surface.
Further, the conic constant of the main mirror A1 is-1.255, the conic constant of the sub-mirror A2 is-3.821, and the interval between the main mirror A1 and the sub-mirror A2 is 155.0 mm.
Further, the main reflecting mirror a1 and the secondary reflecting mirror a2 are made of K9 glass materials.
Furthermore, a light splitting film is plated on the light splitting surface of the light splitting prism B.
Further, the reflecting mirror D1 is a plane reflecting mirror, and the included angle between the plane reflecting mirror and the optical axis of the system is 45 °.
Furthermore, the central distance between the beam splitter B and the visible light lens group C is 27.0mm, and the central distance between the beam splitter B and the short wave infrared lens group D is 32.3 mm.
Further, in the visible light lens group C, the air space between the positive crescent lens C1 and the positive crescent lens C2 is 0.14mm, the air space between the positive crescent lens C2 and the negative crescent lens C3 is 1.33mm, and the air space between the negative crescent lens C3 and the visible light filter C4 is 26.00 mm; in the short-wave infrared lens group D, the air interval between the reflector D1 and the negative crescent lens D2 is 19.82mm, the air interval between the negative crescent lens D2 and the positive crescent lens D3 is 0.74mm, the air interval between the positive crescent lens D3 and the biconvex lens D4 is 0.21mm, and the air interval between the biconvex lens D4 and the short-wave infrared filter D5 is 22.00 mm.
Compared with the prior art, the invention has the following effects: (1) the optical system can simultaneously image a visible light wave band (0.4-0.9 mu m) and a short wave infrared wave band (0.9-1.7 mu m) of a target, so that the light energy utilization rate is improved, and the target reconnaissance capability of the system is enhanced; (2) the dual-waveband common light path adopts a reflection type light path structure, eliminates the influence of chromatic aberration, particularly secondary spectrum, on a long-focus system, is beneficial to improving the imaging quality of an optical system, and simultaneously effectively reduces the length of the system.
Description of the drawings:
fig. 1 is a schematic diagram of an optical path structure according to an embodiment of the present invention.
In the figure:
a-a common lens group; a1 — primary mirror; a 2-secondary mirror; b-a beam splitting prism; c-visible light lens group; c1-orthodontic lens; c2-orthodontic lens; c3-negative crescent lens; c4-visible light filter; a D-short wave infrared lens group; d1-mirror; d2-negative crescent lens; d3-orthodontic lens; d4-biconvex lens; d5-short wave infrared filter.
The specific implementation mode is as follows:
the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the visible light and shortwave infrared dual-band common-aperture long-focus optical system comprises a common lens group a, a beam splitter prism B, a visible light lens group C and a shortwave infrared lens group D, wherein the common lens group a and the beam splitter prism B are arranged along an incident light path from left to right, the beam splitter prism B splits emergent light from the common lens group a into two paths on the right side and the upper side, the two paths on the right side and the upper side respectively perform simultaneous imaging through the visible light lens group C and the shortwave infrared lens group D, the common lens group a, the beam splitter prism B and the visible light lens group C form a visible light path, and a visible light detector receives the imaging; the common mirror group A, the beam splitter prism B and the short wave infrared mirror group D form a short wave infrared light path, and the short wave infrared detector receives and images. The visible light wave band and the short wave infrared wave band of the target are imaged simultaneously, so that the light energy utilization rate is improved, and the target reconnaissance capability of the system is enhanced; and the dual-waveband common light path adopts a reflection type light path structure, thereby eliminating the influence of chromatic aberration, particularly secondary spectrum, on the long-focus system, being beneficial to improving the imaging quality of the optical system and effectively reducing the length of the system.
In the embodiment, the visible light path and the short wave infrared path have the same relative aperture and focal length, so that simultaneous imaging of visible light (0.4-0.9 μm) and short wave infrared (0.9-1.7 μm) dual-band is realized, and the light energy utilization rate is improved.
In this embodiment, the common mirror group a includes a secondary mirror a2 and a primary mirror a1 sequentially arranged from left to right; the visible light mirror group C is positioned at the rear side of the beam splitter B and comprises a positive crescent lens C1, a positive crescent lens C2, a negative crescent lens C3 and a visible light color filter C4 which are sequentially arranged from left to right; the short wave infrared lens group D is positioned on the upper side of the beam splitter B and comprises a reflector D1, a negative crescent lens D2, a positive crescent lens D3, a double convex lens D4 and a short wave infrared filter D5 which are sequentially arranged from left to right.
In this embodiment, the reflection surface of the main reflection mirror a1 is a quadric surface with an opening at the center, wherein the conic constant is-1.255; the reflecting surface of the secondary reflector A2 is a quadric surface, wherein the conic constant is-3.821.
In this embodiment, the distance between the primary mirror A1 and the secondary mirror A2 is 155.0 mm.
In this embodiment, the main mirror a1 and the sub mirror a2 are made of K9 glass.
In this embodiment, the splitting surface of the splitting prism B is plated with a splitting film, so that visible light can be transmitted and short-wave infrared light can be reflected.
In this embodiment, speculum D1 is the plane mirror, and its and the contained angle of system optical axis are 45, and the size of whole system has been reduced to short wave infrared light path carrying out the inflection.
In this embodiment, the central distance between the beam splitter B and the visible light mirror group C is 27.0mm, and the central distance between the beam splitter B and the short wave infrared mirror group D is 32.3 mm.
In this embodiment, in the visible light lens group C, the air space between the positive crescent lens C1 and the positive crescent lens C2 is 0.14mm, the air space between the positive crescent lens C2 and the negative crescent lens C3 is 1.33mm, and the air space between the negative crescent lens C3 and the visible light filter C4 is 26.00 mm; in the short-wave infrared lens group D, the air interval between the reflector D1 and the negative crescent lens D2 is 19.82mm, the air interval between the negative crescent lens D2 and the positive crescent lens D3 is 0.74mm, the air interval between the positive crescent lens D3 and the biconvex lens D4 is 0.21mm, and the air interval between the biconvex lens D4 and the short-wave infrared filter D5 is 22.00 mm.
In this embodiment, each lens of the visible light mirror group C needs to satisfy the parameter requirements shown in table 1.
Table 1 visible light mirror group lens C parameter table:
in this embodiment, each lens of the short wave infrared lens group D needs to satisfy the parameter requirements shown in table 2.
Table 2 short wave infrared lens set lens parameter table:
the focal length of the optical system reaches 750mm, the relative aperture is 1/6.0, the spatial frequency of a visible light waveband modulation transfer function reaches 145lp/mm, the spatial frequency of a short wave infrared waveband modulation transfer function reaches 34lp/mm, the two waveband transfer functions are close to the diffraction limit, the imaging is excellent, the resolution is high, and all-weather long-distance target detection can be realized.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (10)
1. The utility model provides a visible light, infrared double wave band of shortwave are burnt optical system altogether aperture longs which characterized in that: the optical system comprises a common lens group A, a beam splitter prism B, a visible light lens group C and a short wave infrared lens group D, wherein the common lens group A and the beam splitter prism B are arranged from left to right along an incident light path, the beam splitter prism B divides emergent light from the common lens group A into two paths, the two paths of light paths respectively form images through the visible light lens group C and the short wave infrared lens group D, and the common lens group A, the beam splitter prism B and the visible light lens group C form a visible light path; the common mirror group A, the beam splitter prism B and the short wave infrared mirror group D form a short wave infrared light path.
2. The visible light, short wave and infrared dual-waveband co-aperture long-focus optical system as claimed in claim 1, wherein: the visible light path and the short wave infrared path have the same relative aperture and focal length.
3. The visible light, short wave and infrared dual-waveband co-aperture long-focus optical system as claimed in claim 1, wherein: the common mirror group A comprises a secondary mirror A2 and a primary mirror A1 which are arranged from left to right in sequence; the visible light mirror group C is positioned at the rear side of the beam splitter B and comprises a positive crescent lens C1, a positive crescent lens C2, a negative crescent lens C3 and a visible light color filter C4 which are sequentially arranged from left to right; the short wave infrared lens group D is positioned on the upper side of the beam splitter B and comprises a reflector D1, a negative crescent lens D2, a positive crescent lens D3, a double convex lens D4 and a short wave infrared filter D5 which are sequentially arranged from left to right.
4. The visible light, short wave and infrared dual-waveband co-aperture long-focus optical system as claimed in claim 3, wherein: the reflecting surface of the main reflecting mirror A1 is a quadric surface with a hole at the center, and the reflecting surface of the secondary reflecting mirror A2 is a quadric surface.
5. The visible light, short wave and infrared dual-waveband co-aperture long-focus optical system as claimed in claim 4, wherein: the conic constant of the primary mirror A1 is-1.255, the conic constant of the secondary mirror A2 is-3.821, and the spacing between the primary mirror A1 and the secondary mirror A2 is 155.0 mm.
6. The visible light, shortwave infrared dual-band co-aperture tele optical system of claim 3 or 4, wherein: the main reflector A1 and the secondary reflector A2 are made of K9 glass materials.
7. The visible light, short wave and infrared dual-waveband co-aperture long-focus optical system as claimed in claim 3, wherein: and the light splitting surface of the light splitting prism B is plated with a light splitting film.
8. The visible light, short wave and infrared dual-waveband co-aperture long-focus optical system as claimed in claim 3, wherein: the reflector D1 is a plane reflector, and the included angle between the reflector and the optical axis of the system is 45 degrees.
9. The visible light, shortwave infrared dual-band co-aperture tele optical system of claim 1 or 3, wherein: the central distance between the beam splitter prism B and the visible light lens group C is 27.0mm, and the central distance between the beam splitter prism B and the short wave infrared lens group D is 32.3 mm.
10. The visible light, short wave and infrared dual-waveband co-aperture long-focus optical system as claimed in claim 3, wherein: in the visible light lens group C, the air space between the positive crescent lens C1 and the positive crescent lens C2 is 0.14mm, the air space between the positive crescent lens C2 and the negative crescent lens C3 is 1.33mm, and the air space between the negative crescent lens C3 and the visible light filter C4 is 26.00 mm; in the short-wave infrared lens group D, the air interval between the reflector D1 and the negative crescent lens D2 is 19.82mm, the air interval between the negative crescent lens D2 and the positive crescent lens D3 is 0.74mm, the air interval between the positive crescent lens D3 and the biconvex lens D4 is 0.21mm, and the air interval between the biconvex lens D4 and the short-wave infrared filter D5 is 22.00 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911114436.2A CN110850573B (en) | 2019-11-14 | 2019-11-14 | Visible light, infrared dual-waveband of shortwave share aperture long focus optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911114436.2A CN110850573B (en) | 2019-11-14 | 2019-11-14 | Visible light, infrared dual-waveband of shortwave share aperture long focus optical system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110850573A true CN110850573A (en) | 2020-02-28 |
| CN110850573B CN110850573B (en) | 2021-08-10 |
Family
ID=69601806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911114436.2A Active CN110850573B (en) | 2019-11-14 | 2019-11-14 | Visible light, infrared dual-waveband of shortwave share aperture long focus optical system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110850573B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111751915A (en) * | 2020-06-27 | 2020-10-09 | 同济大学 | Compact infrared viewfinder optical system based on free-form surface prism |
| CN112180578A (en) * | 2020-09-25 | 2021-01-05 | 中国科学院西安光学精密机械研究所 | Visible light-medium wave infrared dual-waveband common-aperture optical system |
| CN112763192A (en) * | 2020-12-29 | 2021-05-07 | 福建福光股份有限公司 | Multi-wavelength confocal laser detection optical path with self-calibration function |
| CN113064255A (en) * | 2021-04-01 | 2021-07-02 | 中国空空导弹研究院 | Laser emitter zoom mechanism |
| CN114018403A (en) * | 2021-11-08 | 2022-02-08 | 长春理工大学 | Multi-band spectrum receiving and visible light imaging common-aperture optical system |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002318157A (en) * | 2001-04-24 | 2002-10-31 | Nec Corp | Electromagnetic wave detection device |
| CN201964957U (en) * | 2011-01-27 | 2011-09-07 | 北京空间机电研究所 | Reverse blending multispectral imaging system |
| CN203217159U (en) * | 2012-09-27 | 2013-09-25 | 中国科学院西安光学精密机械研究所 | Visible light, middle-wavelength infrared and long-wavelength infrared three-waveband optical imaging system |
| CN104977621A (en) * | 2015-07-01 | 2015-10-14 | 中国科学院长春光学精密机械与物理研究所 | Visible-light-and-medium-wave-infrared composite detection system |
| US9244264B1 (en) * | 2013-06-14 | 2016-01-26 | Sandia Corporation | Gimbaled multispectral imaging system and method |
| CN107490858A (en) * | 2017-08-29 | 2017-12-19 | 西安空间无线电技术研究所 | It is a kind of based on exhibition as the optical antenna and its design method of prism |
| US20180164572A1 (en) * | 2016-12-13 | 2018-06-14 | Thales | Compact telescope having a plurality of focal lengths compensated for by a deformable mirror |
| CN208459675U (en) * | 2018-06-04 | 2019-02-01 | 凯迈（洛阳）测控有限公司 | A kind of long-focus, heavy caliber, more visual field medium-wave infrared optical systems |
| CN109633879A (en) * | 2018-12-17 | 2019-04-16 | 中国科学院西安光学精密机械研究所 | A kind of High Resolution Visible Light medium-wave infrared two waveband optical imaging system |
-
2019
- 2019-11-14 CN CN201911114436.2A patent/CN110850573B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002318157A (en) * | 2001-04-24 | 2002-10-31 | Nec Corp | Electromagnetic wave detection device |
| CN201964957U (en) * | 2011-01-27 | 2011-09-07 | 北京空间机电研究所 | Reverse blending multispectral imaging system |
| CN203217159U (en) * | 2012-09-27 | 2013-09-25 | 中国科学院西安光学精密机械研究所 | Visible light, middle-wavelength infrared and long-wavelength infrared three-waveband optical imaging system |
| US9244264B1 (en) * | 2013-06-14 | 2016-01-26 | Sandia Corporation | Gimbaled multispectral imaging system and method |
| CN104977621A (en) * | 2015-07-01 | 2015-10-14 | 中国科学院长春光学精密机械与物理研究所 | Visible-light-and-medium-wave-infrared composite detection system |
| US20180164572A1 (en) * | 2016-12-13 | 2018-06-14 | Thales | Compact telescope having a plurality of focal lengths compensated for by a deformable mirror |
| CN107490858A (en) * | 2017-08-29 | 2017-12-19 | 西安空间无线电技术研究所 | It is a kind of based on exhibition as the optical antenna and its design method of prism |
| CN208459675U (en) * | 2018-06-04 | 2019-02-01 | 凯迈（洛阳）测控有限公司 | A kind of long-focus, heavy caliber, more visual field medium-wave infrared optical systems |
| CN109633879A (en) * | 2018-12-17 | 2019-04-16 | 中国科学院西安光学精密机械研究所 | A kind of High Resolution Visible Light medium-wave infrared two waveband optical imaging system |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111751915A (en) * | 2020-06-27 | 2020-10-09 | 同济大学 | Compact infrared viewfinder optical system based on free-form surface prism |
| CN111751915B (en) * | 2020-06-27 | 2021-05-11 | 同济大学 | Compact infrared viewfinder optical system based on free-form surface prism |
| CN112180578A (en) * | 2020-09-25 | 2021-01-05 | 中国科学院西安光学精密机械研究所 | Visible light-medium wave infrared dual-waveband common-aperture optical system |
| CN112180578B (en) * | 2020-09-25 | 2021-08-17 | 中国科学院西安光学精密机械研究所 | Visible light-medium wave infrared dual-waveband common-aperture optical system |
| CN112763192A (en) * | 2020-12-29 | 2021-05-07 | 福建福光股份有限公司 | Multi-wavelength confocal laser detection optical path with self-calibration function |
| CN113064255A (en) * | 2021-04-01 | 2021-07-02 | 中国空空导弹研究院 | Laser emitter zoom mechanism |
| CN114018403A (en) * | 2021-11-08 | 2022-02-08 | 长春理工大学 | Multi-band spectrum receiving and visible light imaging common-aperture optical system |
| CN114018403B (en) * | 2021-11-08 | 2023-04-25 | 长春理工大学 | Multiband spectrum receiving and visible light imaging common aperture optical system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110850573B (en) | 2021-08-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110850573B (en) | Visible light, infrared dual-waveband of shortwave share aperture long focus optical system | |
| CN108152973B (en) | Visible light and medium wave infrared common-caliber composite optical system | |
| CN102495474B (en) | Visible light/long-wave infrared broad band spectrum joint focusing optical imaging system | |
| CN103792652A (en) | Fold-back type optical system combining active/passive detection | |
| CN108801460B (en) | Common-caliber multi-channel full-band hyperspectral imaging system | |
| CN105511075A (en) | Two-dimensional image motion compensation optical system for large-field-of-view whisk-broom double-channel imager | |
| CN104977621A (en) | Visible-light-and-medium-wave-infrared composite detection system | |
| CN205581405U (en) | Visible light / infrared dual waveband is long burnt optical system of bore altogether | |
| CN112305727A (en) | High-speed switching type dual-waveband dual-view-field optical system based on infrared dual-color detector | |
| CN111025529B (en) | Ultra-small F number medium-long wave infrared fixed-focus lens | |
| CN112305721A (en) | Infrared dual-waveband telescopic optical system | |
| CN214151214U (en) | Infrared dual-band telescopic optical system, search tracking system and forward-looking infrared system | |
| CN110596870A (en) | Compact visible-infrared dual-waveband optical system | |
| CN113900242A (en) | Multiband common-path optical system | |
| CN210005114U (en) | Full-waveband large-relative-aperture Dyson spectral imaging system | |
| CN109696744B (en) | Multiband integrated sensor optical system | |
| CN111381352A (en) | Transmission type double-spectrum common-aperture zooming optical system | |
| CN114089514B (en) | Refrigeration type medium wave infrared optical system | |
| CN115933149A (en) | Light airborne short wave infrared imaging optical system | |
| CN212483959U (en) | Visible light lens optical structure suitable for near space | |
| GB2531726A (en) | Compact multispectral wide angle refractive optical system | |
| CN110865452B (en) | Airborne medium wave refrigeration infrared continuous zooming optical system | |
| CN210774359U (en) | Convergent light-splitting aperture multispectral imaging optical system | |
| CN102866482A (en) | Fisheye infrared lens | |
| CN112882199A (en) | High-performance airborne head-mounted low-light-level night vision 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 |