CN103345050B - Space refraction and reflection type multichannel imaging optical system - Google Patents
Space refraction and reflection type multichannel imaging optical system Download PDFInfo
- Publication number
- CN103345050B CN103345050B CN201310288153.6A CN201310288153A CN103345050B CN 103345050 B CN103345050 B CN 103345050B CN 201310288153 A CN201310288153 A CN 201310288153A CN 103345050 B CN103345050 B CN 103345050B
- Authority
- CN
- China
- Prior art keywords
- refraction
- reflection
- mirror
- optical system
- focal plane
- 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
Landscapes
- Optical Filters (AREA)
- Lenses (AREA)
Abstract
A space refraction and reflection type multichannel imaging optical system comprises a main lens, a refraction and reflection type secondary lens, a third lens, a switching reflection lens, a color separation film, a shimmer channel focal plane device, and a visible light and near-infrared channel focal plane device. After the radiation beam of an imaging object is reflected through the main lens, the light beam of a visible light and near-infrared channel reaches the color separation film, and then forms an image at the position of a visible light channel focal plane after being reflected and transmitted through the front surface and the rear surface of the refraction and reflection type secondary lens and then reflected through the third lens. The light beam of a near-infrared channel transmits through the color separation film and forms an image at the position of the near-infrared focal plane device. After the switching reflection lens is switched and a light path is switch-in, the light beam of a shimmer channel is reflected through the main lens and then reflected through the refraction and reflection type secondary lens and the third lens and then is incident to a shimmer and visible near-infrared switching reflection lens, and the light beam of the shimmer channel is reflected through the front surface to be incident to the shimmer channel focal plane device to form an image. The space refraction and reflection type multichannel imaging optical system is simple in model, compact in structure, small in size, low in weight, large in visual field, capable of achieving a large-range and high-resolution dynamic monitoring function in daytime, morning and dusk.
Description
Technical field
The invention belongs to space optical remote sensor technical field, relate to a kind of space refraction-reflection multi channel imaging optical system.
Background technology
Along with the development of remote sensing technology, to the round-the-clock of ground scenery, all types of user monitors that requirement is more and more higher, not only need to realize high resolving power under the good condition of illumination condition in the daytime to monitor over the ground, also need the period in morning and evening illumination conditions is poor also can realize high resolving power function for monitoring simultaneously.The visible channel of current China's major part set by satellite only possesses daylight observation ability, cannot obtain visible cloud image in morning and evening and night-time hours.Thus in the urgent need to development high sensitivity visible ray low-light level imaging technology, obtain the visible cloud image under morning and evening and night low-illumination, improve the accuracy to low clouds and dense fog identification in low-light (level) situation, military meteorology service is provided round-the-clock.
In order to imaging while can realizing morning and evening and daytime, multiple independently optical system can be adopted, respectively to low-light and visible spectrum imaging.But adopting multiple stage camera to realize acquisition of information of many time periods will make the volume and weight of space camera all very huge, adds the launch cost of satellite, reduces the fiduciary level of whole star.
Summary of the invention
The technical matters that the present invention solves is: overcome the deficiencies in the prior art, provide a kind of refraction-reflection multi channel imaging optical system, solve the integrated design in reflective, Large visual angle, multispectral situation of low-light, visible ray and near infrared spectral coverage.
Technical scheme of the present invention is: space refraction-reflection multi channel imaging optical system, employing from axle three reflecting optical system form, comprises primary mirror, refraction-reflection secondary mirror, three mirrors, switched mirror, low-light passage focal plane device, color separation film, visible channel focal plane device, near infrared channels focal plane device without intermediary image; Space refraction-reflection multi channel imaging optical system comprises visible channel, near infrared channels and low-light passage, and switched mirror cuts light path when the imaging of low-light passage, cuts out light path when visible and near infrared channels imaging; Color separation film front surface is coated with dichroic coating; The radiation laser beam of imageable target through primary mirror reflects to the front surface of refraction-reflection secondary mirror, visible channel and near infrared channels light beam are through the front surface transmission of refraction-reflection secondary mirror, to the rear surface reflection of refraction-reflection secondary mirror, through front surface to three mirror of refraction-reflection secondary mirror, wherein the light beam of visible channel is through the front surface reflection of color separation film, arrives the place's imaging of visible channel focal plane device; The light beam of near infrared channels arrives focal plane device place's imaging of near infrared channels through color separation film; Moment in morning and evening switched mirror incision light path, low-light channel beam, after the front surface and the reflection of three mirrors of primary mirror, refraction-reflection secondary mirror, arrives switched mirror front surface, after switched mirror reflection, arrives the place's imaging of low-light passage focal plane device.
The described primary mirror from axle three reflecting optical system and three mirror surface-shapeds are recessed non-spherical reflector, and the face shape of refraction-reflection secondary mirror is convex spherical, and the two sides of switched mirror and color separation film is plane.
Described primary mirror and three mirror materials are silit or fused quartz, and refraction-reflection secondary mirror, switched mirror and color separation film are colouless optical glass.
The reflecting surface of described primary mirror, three mirrors is all coated with metal high reflectance reflectance coating, and the front surface of refraction-reflection secondary mirror is coated with high anti-low permeable membrane, and the rear surface of refraction-reflection secondary mirror is coated with metal high reflectance reflectance coating.
Described switched mirror is dull and stereotyped, and color separation film is wedge, and the central shaft of color separation film does not overlap with secondary mirror central shaft.
Described low-light passage spectral coverage scope is 0.45 μm-1 μm; Visible channel spectral coverage scope 0.5 μm-0.8 μm; Near infrared channels spectral coverage scope is 0.8-1 μm.
The relative aperture of described low-light passage is greater than the relative aperture of visible ray and near infrared channels.
Visible channel, near infrared channels diaphragm are arranged on refraction-reflection secondary mirror front surface, by controlling the relative aperture of reflectance coating bore restriction visible ray and near infrared two passages; Low-light passage diaphragm is arranged on refraction-reflection secondary mirror front surface, limits the relative aperture of low-light passage by controlling front surface film system bore.
Described low-light passage focal plane device is linear TDI CCD device.
Described visible channel focal plane device is linear TDI CCD device; Described near infrared channels focal plane device is linear TDI CCD device.
The present invention's advantage is compared with prior art:
1) primary optical system of the present invention is owing to have employed from the anti-basic pattern of axle three, effectively reduces the quantity of primary optical system optical element, no color differnece, without blocking, and can be good to low-light, visible ray and the equal imaging of near infrared spectral coverage; Can pin low-light passage to carry out debuging, picture element detects, the system of reducing debugs complexity.
2) the present invention utilizes refraction-reflection secondary mirror in conjunction with the structural shape of switched mirror and color separation film, and realize low-light passage and visible ray, near infrared channels timesharing imaging, enormously simplify the structure of optical system, improve geometry image quality, pixel consistance is good;
3) viewability channel, near infrared channels arrange diaphragm in refraction-reflection secondary mirror rear surface, refraction-reflection secondary mirror front surface is coated with high anti-low permeable membrane, limiting the light beam aperture of visible/near infrared two passages by controlling rear surface reflectance coating bore, ensureing the energy requirement of low-light, visible ray and near infrared channels simultaneously; Low-light passage diaphragm is arranged on secondary mirror front surface place, makes low-light passage without transmissive element, effectively ensure that the picture element of low-light passage.
4) the present invention have that mechanical-optical setup is compact, composition is simple, within the scope of hyperchannel image quality good, be easy to the advantages such as realization, the imaging realizing compared with Large visual angle compared with short-term array detector array can be applied.For airborne/spaceborne high-resolution multi-spectral imaging system proposes a good technology realization means, be specially adapted to continue, stably obtain daytime and morning and evening earth's surface information detected with high accuracy satellite optical system.
Accompanying drawing explanation
Fig. 1 is optical system of the present invention composition structural representation.
Embodiment
As shown in Figure 1, optical system of the present invention is by from axle three reflecting optical system primary mirror 1, refraction-reflection secondary mirror 2, form from axle three reflecting optical system three mirror 4, switched mirror 5, low-light passage focal plane device 6, color separation film 7, visible channel focal plane device 8, near infrared channels focal plane device 9.Switched mirror 5 cuts light path when the imaging of low-light passage, cuts out light path when visible and near infrared channels imaging, thus realizes low-light passage and visible ray, near infrared channels timesharing imaging; Color separation film 7 front surface plating dichroic coating, realizes reflect visible light spectral coverage, transmission near infrared spectral coverage.
Comprising of optical system of the present invention is three passages: low-light passage spectral coverage scope 0.4 μm-1 μm, visible channel spectral coverage scope 0.5 μm-0.8 μm, near infrared channels spectral coverage scope are 0.8 μm-1 μm.When visible ray and near infrared channels imaging, light beam in visual field enters main optical from the anti-system of axle three, the light reflected through primary mirror 1 is to the front surface of refraction-reflection secondary mirror 2, premenstrual surface transmission is to the rear surface of refraction-reflection secondary mirror 2, the rear surface place of refraction-reflection secondary mirror 2 is coated with reflectance coating, the light beam of visible channel and near infrared channels after its reflection through the front surface of refraction-reflection secondary mirror 2 to from anti-three mirrors 4 of axle three, after its reflection, the light beam of visible channel, through the front surface reflection of color separation film 7, arrives visible channel focal plane device 8; The light beam of near infrared channels arrives near infrared channels focal plane device 9 through color separation film 7, and wherein visible channel focal plane device 8 and near infrared channels focal plane device 9 are linear TDI CCD device.Switched mirror 5 is cut light path and is realized the imaging of low-light passage, low-light channel beam through the front surface of primary mirror 1, refraction-reflection secondary mirror 2 and from axle three anti-three mirrors 4 reflect after, arrive switched mirror 5 front surface, reflex to low-light passage focal plane device 6 through 5, low-light passage focal plane device 6 is linear TDI CCD device.
The focal length of optical system of the present invention three path channels is consistent, is 500mm.Based on the requirement of camera system energy and signal to noise ratio (S/N ratio), low-light passage relative aperture is chosen for 3, and consider the requirement of visible near-infrared channel detection device energy saturation degree, visible/near infrared passage relative aperture elects 4 as, and three passage visual field sizes are 5 °.Optical System Design selects the inclined field of Y-direction to use 5 °.
Diaphragm is placed on the rear surface of refraction-reflection secondary mirror 2 by visible ray and near infrared two passages, diaphragm is placed on the front surface of refraction-reflection secondary mirror 2 by low-light passage, the front surface of refraction-reflection secondary mirror 2 is coated with high anti-low permeable membrane, 85% being reached to low-light passage 0.45 μm-1 μm spectral coverage reflectivity, to 0.5 μm-0.8 μm, visible/near infrared passage and 0.8 μm-1 μm spectral coverage transmitance 15%, controlling the beam size of each passage by controlling refraction-reflection secondary mirror front and rear surfaces bore.
Coaxial from the anti-system physical of axle three, axle centered by the center of refraction-reflection secondary mirror 2, each catoptron all uses local bore, and main optical is zero from the central vision chief ray of axle three reflecting optical system and the angle of image planes normal.Primary mirror 1 and three mirrors 4 all adopt recessed catoptron, and be convex spherical from the front surface of axle three anti-system refraction-reflection secondary mirror 2 and rear surface, radius-of-curvature is inconsistent, to increase the optimal design degree of freedom of different passage, meets the picture element requirement of different passage.Primary mirror 1 and three mirrors 4 are aspheric mirror.Primary mirror 1 is four ellipsoids, and refraction-reflection secondary mirror 2 is sphere or aspheric surface, and three mirrors 4 are secondary oblate spheroid.The reflecting surface of primary mirror 1 and three mirrors 4 is all coated with the reflectance coating of aluminium or ag material, and the material that primary mirror 1 and three mirrors 4 adopt is metallic beryllium, or crystallite, or silit, or melts quartz; Aluminize or the metal high reflectance reflectance coating of ag material in refraction-reflection secondary mirror 2 rear surface, the material of refraction-reflection secondary mirror 2 adopts colouless optical glass.
Switched mirror 5 is dull and stereotyped, and switched mirror 5 plane of light incidence pitch angle is for be rotated counterclockwise 25 ° along optical axis; Color separation film 7 is wedge, whole color separation film slant setting, color separation film 7 plane of light incidence pitch angle for be rotated counterclockwise 45 ° along optical axis, second surface pitch angle for be rotated counterclockwise 45.2 ° along optical axis, i.e. color separation film front and rear surfaces angle 0.2 °.
The material that switched mirror 5 adopts is metallic beryllium, or crystallite, or silit, or melts quartz; Color separation film 7 adopts NBK7 material, and two surfaces are plane.
The central shaft of color separation film 7 and refraction-reflection secondary mirror 2 central shaft are 110mm at vertical axial offset distance.
The content be not described in detail in instructions of the present invention belongs to the known technology of those skilled in the art.
Claims (10)
1. space refraction-reflection multi channel imaging optical system, adopt without intermediary image from axle three reflecting optical system form, comprise primary mirror (1), refraction-reflection secondary mirror (2), three mirrors (4), switched mirror (5), visible channel focal plane device (8), near infrared channels focal plane device (9), described space refraction-reflection multi channel imaging optical system comprises visible channel, it is characterized in that: also comprise low-light passage focal plane device (6), color separation film (7); Described space refraction-reflection multi channel imaging optical system also comprises near infrared channels and low-light passage; Switched mirror (5) cuts light path when the imaging of low-light passage, cuts out light path when visible and near infrared channels imaging; Color separation film (7) front surface is coated with dichroic coating; The radiation laser beam of imageable target reflexes to the front surface of refraction-reflection secondary mirror (2) through primary mirror (1), visible channel and near infrared channels light beam are through the front surface transmission of refraction-reflection secondary mirror (2), to the rear surface reflection of refraction-reflection secondary mirror (2), through front surface to three mirror (4) of refraction-reflection secondary mirror (2), the wherein front surface reflection of light beam through color separation film (7) of visible channel, arrives device (8) the place's imaging of visible channel focal plane; The light beam of near infrared channels arrives focal plane device (9) place's imaging of near infrared channels through color separation film (7); Moment in morning and evening switched mirror (5) incision light path, low-light channel beam is after the front surface and three mirrors (4) reflection of primary mirror (1), refraction-reflection secondary mirror (2), arrive switched mirror (5) front surface, after switched mirror (5) reflection, arrive device (6) the place's imaging of low-light passage focal plane.
2. space according to claim 1 refraction-reflection multi channel imaging optical system, it is characterized in that: the described primary mirror from axle three reflecting optical system (1) and three mirrors (4) face shape are recessed non-spherical reflector, the face shape of refraction-reflection secondary mirror (2) is convex spherical, and the two sides of switched mirror (5) and color separation film (7) is plane.
3. space according to claim 1 refraction-reflection multi channel imaging optical system, it is characterized in that: described primary mirror (1) and three mirrors (4) material are silit or fused quartz, refraction-reflection secondary mirror (2), switched mirror (5) and color separation film (7) are colouless optical glass.
4. space according to claim 1 refraction-reflection multi channel imaging optical system, it is characterized in that: described primary mirror (1), the reflecting surface of three mirrors (4) are all coated with metal high reflectance reflectance coating, the front surface of refraction-reflection secondary mirror (2) is coated with high anti-low permeable membrane, and the rear surface of refraction-reflection secondary mirror (2) is coated with metal high reflectance reflectance coating.
5. space according to claim 1 refraction-reflection multi channel imaging optical system, it is characterized in that: described switched mirror (5) is for dull and stereotyped, color separation film (7) is wedge, and the central shaft of color separation film (7) does not overlap with secondary mirror (2) central shaft.
6. space according to claim 1 refraction-reflection multi channel imaging optical system, is characterized in that: described low-light passage spectral coverage scope is 0.45 μm-1 μm; Visible channel spectral coverage scope 0.5 μm-0.8 μm; Near infrared channels spectral coverage scope is 0.8-1 μm.
7. space according to claim 1 refraction-reflection multi channel imaging optical system, is characterized in that: the relative aperture of described low-light passage is greater than the relative aperture of visible ray and near infrared channels.
8. space according to claim 1 refraction-reflection multi channel imaging optical system, it is characterized in that: visible channel, near infrared channels diaphragm are arranged on refraction-reflection secondary mirror (2) front surface, by controlling the relative aperture of reflectance coating bore restriction visible ray and near infrared two passages; Low-light passage diaphragm is arranged on refraction-reflection secondary mirror (2) front surface, limits the relative aperture of low-light passage by controlling front surface film system bore.
9. space according to claim 1 refraction-reflection multi channel imaging optical system, is characterized in that: described low-light passage focal plane device (6) is linear TDI CCD device.
10. space according to claim 1 refraction-reflection multi channel imaging optical system, is characterized in that: described visible channel focal plane device (8) is linear TDI CCD device; Described near infrared channels focal plane device (9) is linear TDI CCD device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310288153.6A CN103345050B (en) | 2013-07-10 | 2013-07-10 | Space refraction and reflection type multichannel imaging optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310288153.6A CN103345050B (en) | 2013-07-10 | 2013-07-10 | Space refraction and reflection type multichannel imaging optical system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103345050A CN103345050A (en) | 2013-10-09 |
| CN103345050B true CN103345050B (en) | 2015-03-18 |
Family
ID=49279862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310288153.6A Active CN103345050B (en) | 2013-07-10 | 2013-07-10 | Space refraction and reflection type multichannel imaging optical system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103345050B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592757B (en) * | 2013-10-24 | 2015-09-23 | 中国电子科技集团公司第四十一研究所 | A kind of broadband off-axis reflection focal length/without burnt double-channel telescopic system |
| CN104570316B (en) * | 2014-12-30 | 2017-02-22 | 中国科学院长春光学精密机械与物理研究所 | Automatic three-lens switchover mechanism for vehicle-mounted self-adapting optical imaging telescope |
| CN104749774B (en) * | 2015-03-31 | 2017-05-03 | 中国科学院上海技术物理研究所 | Off-axis three-mirror push broom type laser three-dimensional imaging and transmitting system |
| CN107561674A (en) * | 2017-09-30 | 2018-01-09 | 中国科学院长春光学精密机械与物理研究所 | One kind light splitting three-reflection optical system |
| CN108121049B (en) * | 2017-12-19 | 2020-12-18 | 北京空间机电研究所 | Method for testing installation and adjustment of multi-spectral-band multi-channel remote sensing camera lens |
| CN111552054B (en) * | 2020-06-09 | 2021-12-28 | 河南平原光电有限公司 | Off-axis three-mirror optical system assembling and adjusting method |
| CN113075788A (en) * | 2021-04-02 | 2021-07-06 | 中国科学院长春光学精密机械与物理研究所 | Multispectral multichannel common-caliber zooming imaging optical system |
| CN117170078B (en) * | 2023-11-02 | 2024-01-12 | 中国科学院长春光学精密机械与物理研究所 | Reflection type zoom afocal optical system |
| CN118011714A (en) * | 2024-04-09 | 2024-05-10 | 中国科学院长春光学精密机械与物理研究所 | Switching mechanism for time-sharing imaging of space camera |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102508361A (en) * | 2011-10-31 | 2012-06-20 | 北京空间机电研究所 | Spatial large view field, superwide spectral band and multispectral imaging optical system |
| CN102736237A (en) * | 2012-06-18 | 2012-10-17 | 北京空间机电研究所 | Optical system for space astronomical observation infra-red telescope |
| CN102809824A (en) * | 2012-07-04 | 2012-12-05 | 北京空间机电研究所 | Spatial light beam compression multichannel imaging optical system with large field of view |
-
2013
- 2013-07-10 CN CN201310288153.6A patent/CN103345050B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102508361A (en) * | 2011-10-31 | 2012-06-20 | 北京空间机电研究所 | Spatial large view field, superwide spectral band and multispectral imaging optical system |
| CN102736237A (en) * | 2012-06-18 | 2012-10-17 | 北京空间机电研究所 | Optical system for space astronomical observation infra-red telescope |
| CN102809824A (en) * | 2012-07-04 | 2012-12-05 | 北京空间机电研究所 | Spatial light beam compression multichannel imaging optical system with large field of view |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103345050A (en) | 2013-10-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103345050B (en) | Space refraction and reflection type multichannel imaging optical system | |
| CN103344334B (en) | Based on having intermediary image from the anti-wide spectral multi channel imaging optical system of axle three | |
| CN108957715B (en) | Coaxial photoelectric reconnaissance system | |
| CN102252756B (en) | Front-mounted optical system of satellite-borne differential absorption spectrometer | |
| CN102508361A (en) | Spatial large view field, superwide spectral band and multispectral imaging optical system | |
| CN104535186B (en) | A kind of moving platform infared spectrum association detection system and method | |
| CN102103265B (en) | Single lens multispectral imaging optical system | |
| CN103345062B (en) | High resolution stereo mapping and reconnaissance integrated camera optical system | |
| CN204666945U (en) | A kind of binary channels imaging optical system adopting right-angle reflecting prism | |
| CN108152973B (en) | Visible light and medium wave infrared common-caliber composite optical system | |
| KR100934719B1 (en) | Omnidirectional optics and camera system having the same | |
| CN106443643B (en) | Optical axis monitoring method and device for high-precision active and passive detection system | |
| CN102809824A (en) | Spatial light beam compression multichannel imaging optical system with large field of view | |
| CN105807405B (en) | Suitable for the nearly multispectral optical system of hemisphere visual field constant resolution of Larger Dynamic scope | |
| CN102866487A (en) | Coaxial four-reflector ultra-low distortion optical system | |
| CN103309019A (en) | Optical system of ultraviolet multi-band panoramic imaging instrument | |
| CN104570146A (en) | Space debris detection imaging and communication system | |
| CN103226236A (en) | Large-viewing-field spherical three-mirror optical system | |
| CN103017900A (en) | Dual-channel common-path prism dispersion broadband imaging spectrometer optical system | |
| CN107271986A (en) | A kind of staring imaging receiving optics for MEMS micromirror laser radar | |
| CN104090355A (en) | All-weather star sensor optical system | |
| CN109211413A (en) | A kind of infrared visible light is total to aperture imaging optical system | |
| CN103308161B (en) | Space remote sensing large-relative-hole-diameter wide-field high-resolution imaging spectrometer optical system | |
| CN203217172U (en) | Catadioptric ultra-wide wave band small obscuration ratio telescope optical system | |
| CN113075788A (en) | Multispectral multichannel common-caliber zooming imaging optical system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |