CN103197410A - Oversized view field off-axis reflection system used for imaging spectrometer - Google Patents
Oversized view field off-axis reflection system used for imaging spectrometer Download PDFInfo
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- CN103197410A CN103197410A CN2013100664027A CN201310066402A CN103197410A CN 103197410 A CN103197410 A CN 103197410A CN 2013100664027 A CN2013100664027 A CN 2013100664027A CN 201310066402 A CN201310066402 A CN 201310066402A CN 103197410 A CN103197410 A CN 103197410A
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Abstract
The invention provides an oversized view field off-axis reflection system used for an imaging spectrometer and relates to the technical field of space optics. The oversized view field off-axis reflection system used for the imaging spectrometer solves the problems that an existing spectrometer is not large enough in view field and covering width and is long in return visit period. The oversized view field off-axis reflection system used for the imaging spectrometer comprises a first parasitic light eliminating diaphragm, a first reflector, a second parasitic light eliminating diaphragm, a depolarizer, an aperture diaphragm, a second reflector and an entrance slit. Parallel beams which are emitted by a target penetrate the first reflector through the first parasitic light eliminating diaphragm, are reflected and focused on the second parasitic light eliminating diaphragm through the first reflector, penetrates the second reflector through the depolarizer and the aperture diaphragm after leaving the second parasitic light eliminating diaphragm, and are focused and imaged to the entrance slit through the second reflector. Due to the adoption the optics system, the imaging spectrometer is oversized in view field, small in size, light in weight, free from blocking, small in parasitic light, high in deliver function, and wide in applicative wave band. The oversized view field off-axis reflection system used for the imaging spectrometer are applied in aerospace atmospheric remote sensing field, ocean water color sensing field, territorial resource sensing field and the like.
Description
Technical field
The present invention relates to the space optics technical field, be specifically related to a kind of ultra-large vision field off-axis reflection telescopic system for imaging spectrometer in the space optics.
Background technology
Imaging spectrometer is to obtain the image of target and the new spatial remote optical sensing instrument of spectroscopic data simultaneously, in fields such as investigation over the ground, atmospheric remote sensing, ocean remote sensings, uses more and more widely.The imaging spectrometer optical system is made up of telescopic system and spectrometer system, and the two organically links together by entrance slit.The function of telescopic system be target imaging on entrance slit, so the fabric width of imaging spectrometer determines that by the visual field of telescopic system telescopical visual field is more big, the fabric width of imaging spectrometer is more big, the return visit cycle is just more little, true resolution is just more high.Along with the continuous development that space remote sensing is used, also more and more higher to the fabric width requirement of imaging spectrometer, require whole world covering once a day, fabric width will reach more than the 2000km.And there is visual field big defective inadequately in the telescopic system of existing imaging spectrometer, and the prior art that shows in the domestic patent can only arrive 65 °, also only is 898km at orbit altitude 705km fabric width., realize the requirement of whole world covering once a day, need the telescopic system of ultra-large vision field, in the 705km orbit altitude, the visual field of telescopic system will reach 115 °, and fabric width reaches 2600km.In order to reduce polarization sensitive element such as grating causes in the spectrometer system polarization response to the influence of radiation calibration precision, also require the telescopic system of imaging spectrometer to have depolarized function.
Summary of the invention
The present invention is little for solving existing imaging spectrometer visual field, can not satisfy the problem of whole world covering once a day, and a kind of ultra-large vision field off-axis reflection telescopic system for imaging spectrometer is provided.
A kind of ultra-large vision field off-axis reflection telescopic system for imaging spectrometer, this optical system comprises first diaphragm for eliminating stray light, first catoptron, second diaphragm for eliminating stray light, depolarizer, aperture diaphragm, second catoptron and entrance slit; The parallel beam that target is sent incides on first catoptron through first diaphragm for eliminating stray light, focus on second diaphragm for eliminating stray light through first mirror reflects, described parallel beam is after the second diaphragm for eliminating stray light outgoing, incide on second catoptron through depolarizer and aperture diaphragm, be imaged onto on the entrance slit through second focusing mirror then; Described second diaphragm for eliminating stray light is positioned on the focal plane of first catoptron.
Principle of work of the present invention: the present invention be the target in the ultra-large vision field scope can blur-free imaging on the entrance slit of telescopic system, adopted off-axis reflect system structure, adopt two catoptrons, the optical axis of two catoptrons does not all overlap with the optical axis of system.This optical system is arranged in order by xyz right hand space coordinates, the z direction of principal axis is decided to be optical axis direction, the x axle is perpendicular to the yz plane, the yz plane is the meridian ellipse of telescopic system, optical axis takes place once to turn back through catoptron, and putting in order of diaphragm, catoptron, depolarizer and entrance slit is first diaphragm for eliminating stray light, first catoptron, second diaphragm for eliminating stray light, depolarizer, aperture diaphragm, second catoptron, entrance slit.The present invention adopts negative-positive optic angle degree allocative decision by two powers of mirror of reasonable distribution, and two catoptrons adopt off-axis to arrange.Aperture diaphragm is positioned on the focal plane of second catoptron and forms telecentric beam path in image space, and two Babinets compensate pseudo-depolarizer incident polarized light is become nonpolarized light, have reduced the influence of polarization response to the radiation calibration precision.
Beneficial effect of the present invention: optical system of the present invention can be used as the telescopic system of ultra-large vision field imaging spectrometer, and field angle reaches 115 °, and the system layout compactness possesses that volume is little, in light weight, nothing is blocked, coefficient of stray light is little, passes the high characteristics of letter.
Description of drawings
Fig. 1 is a kind of structural representation that reflects telescopic system for the ultra-large vision field off-axis of imaging spectrometer of the present invention;
Fig. 2 is that a kind of ultra-large vision field off-axis reflection telescopic system two reflector positions for imaging spectrometer of the present invention concern synoptic diagram.
Among the figure: 1, first diaphragm for eliminating stray light, 2, first catoptron, 3, second diaphragm for eliminating stray light, 4, depolarizer, 5, aperture diaphragm, 6, second catoptron, 7, entrance slit.
Embodiment
Embodiment one, in conjunction with Fig. 1 and Fig. 2 present embodiment is described, a kind of ultra-large vision field off-axis reflection telescopic system for imaging spectrometer, this optical system comprises first diaphragm for eliminating stray light 1, first catoptron 2, second diaphragm for eliminating stray light 3, depolarizer 4, aperture diaphragm 5, second catoptron 6, entrance slit 7; The parallel beam that target is sent incides on first catoptron 2 through described first diaphragm for eliminating stray light 1, through first catoptron, 2 reflect focalizations to second diaphragm for eliminating stray light 3, after 3 outgoing of second diaphragm for eliminating stray light, incide on second catoptron 6 through depolarizer 4 and aperture diaphragm 5, through second catoptron, 6 focal imagings to entrance slit 7; Described aperture diaphragm 5 and is positioned on the focal plane of second catoptron 6 between first catoptron 2 and second catoptron 6; Described depolarizer 4 is positioned near the aperture diaphragm 5; And both distances are more than or equal to 1mm, less than waiting 2mm; Described second diaphragm for eliminating stray light 3 is positioned on first catoptron, 2 focal planes; Described entrance slit 7 is positioned on the image planes of ultra-large vision field off-axis reflection telescopic system; Described first catoptron 2 is that focal power is the spherical reflector of bearing, and second catoptron 6 is that focal power is positive spherical reflector.The radius of curvature R of first catoptron 2
1Radius of curvature R with second catoptron 6
2Satisfy: 2R
1≤ R
2≤ 7R
1The off-axis angle α of first catoptron 2
1Satisfy 3 °≤α
1≤ 6 °, the off-axis angle α of second catoptron 6
2Satisfy-5 °≤α
2≤-2 °.
The relative arrangement of reflecting surface of described first diaphragm for eliminating stray light of present embodiment and first catoptron, the relative arrangement of the reflecting surface of first catoptron and second diaphragm for eliminating stray light, the relative arrangement of the plane of incidence of second diaphragm for eliminating stray light and depolarizer, the exit facet of depolarizer is relative with aperture diaphragm to be arranged, the relative arrangement of reflecting surface of aperture diaphragm and second catoptron, the reflecting surface of second catoptron is relative with the entrance slit face to be arranged.
The described depolarizer 4 of present embodiment is that two Babinets compensate pseudo-depolarizer, material is the birefringence quartz crystal, formed by two pairs of wedges, the optical axis included angle of the optical axis of second pair of wedge and first pair of wedge is 45 °, each to wedge by two have certain angle of wedge, the orthogonal quartz crystal slice of optical axis is formed.
Embodiment two, present embodiment are embodiment one described a kind of embodiment that reflects telescopic system for the ultra-large vision field off-axis of imaging spectrometer: a kind of ultra-large vision field off-axis reflection telescopic system for imaging spectrometer pushes away the telescopic system of sweeping type atmospheric exploration imaging spectrometer as one, orbit altitude 705km, 115 ° of (the x directions in visual field, the fabric width direction) * 0.81 ° (y direction, along the rail direction), corresponding ground is 2600km * 10km.Telescopic system focal length 22mm, entrance slit is of a size of 44mm * 0.311mm.The radius-of-curvature of first catoptron is-53.28mm that the second mirror curvature radius is 304.35mm, the off-axis angle α of first catoptron
1Be 4 °, the off-axis angle α of second catoptron
2Be-4 °, aperture diaphragm is between first catoptron and second catoptron, and the spacing at aperture diaphragm center and the second catoptron center is 149.48mm.Depolarizer is positioned near the aperture diaphragm, and the spacing at the exit facet of depolarizer and aperture diaphragm center is 1mm.Depolarizer compensates pseudo-depolarizer for two Babinets, material is the birefringence quartz crystal, be made up of two pairs of wedges, the optical axis included angle of the optical axis of second pair of wedge and first pair of wedge is 45 °, and each is that 6 °, the orthogonal quartz crystal slice of optical axis are formed to wedge by two angles of wedge.
System of the present invention adopts off-axis to reflect two mirror image sides core structure far away, utilize two diaphragm for eliminating stray light to suppress parasitic light, and have a depolarizer, be suitable as the telescopic system of spaceborne ultra-large vision field imaging spectrometer, can realize that the whole world covers once a day, application comprises atmospheric remote sensing, ocean water colour remote sensing, land resources remote sensing etc.
Above-described embodiment is in order to make purpose of the present invention, technical scheme and advantage more clear, is that the present invention is further described, should be appreciated that the above embodiments only are used for explaining the present invention, and is not used in restriction the present invention.
Claims (7)
1. a ultra-large vision field off-axis that is used for imaging spectrometer reflects telescopic system, and this optical system comprises first diaphragm for eliminating stray light (1), first catoptron (2), second diaphragm for eliminating stray light (3), depolarizer (4), aperture diaphragm (5), second catoptron (6) and entrance slit (7); It is characterized in that, the parallel beam that target is sent incides on first catoptron (2) through first diaphragm for eliminating stray light (1), through first catoptron (2) reflect focalization to second diaphragm for eliminating stray light (3), described parallel beam is after second diaphragm for eliminating stray light (3) outgoing, incide on second catoptron (6) through depolarizer (4) and aperture diaphragm (5), then through second catoptron (6) focal imaging to entrance slit (7); Described second diaphragm for eliminating stray light (3) is positioned on the focal plane of first catoptron (2).
2. a kind of ultra-large vision field off-axis reflection telescopic system for imaging spectrometer according to claim 1 is characterized in that first catoptron (6) is that focal power is the spherical reflector of bearing, and second catoptron is that focal power is positive spherical reflector.
3. a kind of ultra-large vision field off-axis reflection telescopic system for imaging spectrometer according to claim 1 is characterized in that the radius of curvature R of first catoptron (2)
1Radius of curvature R with second catoptron (6)
2Satisfy: 2R
1≤ R
2≤ 7R
1
4. a kind of ultra-large vision field off-axis reflection telescopic system for imaging spectrometer according to claim 1 is characterized in that the off-axis angle α of first catoptron (2)
1Satisfy 3 °≤α
1≤ 6 °, the off-axis angle α of second catoptron (6)
2Satisfy-5 °≤α
2≤-2 °.
5. a kind of ultra-large vision field off-axis reflection telescopic system for imaging spectrometer according to claim 1 is characterized in that described aperture diaphragm (5) is positioned on the focal plane of second catoptron (6), locates to form telecentric beam path in image space at entrance slit (7).
6. a kind of ultra-large vision field off-axis reflection telescopic system for imaging spectrometer according to claim 1 is characterized in that, the distance of described depolarizer (4) and aperture diaphragm (5) at 1mm between the 2mm; Described depolarizer (4) compensates pseudo-depolarizer for two Babinets.
7. a kind of ultra-large vision field off-axis for imaging spectrometer according to claim 6 reflects telescopic system, it is characterized in that, the material of described depolarizer (4) is the birefringence quartz crystal, described stone crystal is made up of two pairs of wedges, the optical axis included angle of the optical axis of second pair of wedge and first pair of wedge is 45 °, and each right wedge has the angle of wedge by two and the orthogonal quartz crystal slice of optical axis is formed.
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| CN2013100664027A CN103197410A (en) | 2013-03-04 | 2013-03-04 | Oversized view field off-axis reflection system used for imaging spectrometer |
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| CN2013100664027A CN103197410A (en) | 2013-03-04 | 2013-03-04 | Oversized view field off-axis reflection system used for imaging spectrometer |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104834105A (en) * | 2015-04-03 | 2015-08-12 | 北京空间机电研究所 | Imaging system using array lens to realize polarization detection |
| CN105372799A (en) * | 2015-12-14 | 2016-03-02 | 中国科学院光电技术研究所 | Off-axis reflection type wide-angle optical lens |
| CN105472210A (en) * | 2014-09-12 | 2016-04-06 | 光宝电子(广州)有限公司 | Image capture device |
| CN107728300A (en) * | 2017-10-26 | 2018-02-23 | 宁波源禄光电有限公司 | A kind of compact reflective off-axis telescopic system of wide visual field object lens of large relative aperture |
| CN107850770A (en) * | 2015-03-27 | 2018-03-27 | Drs网络和成像系统公司 | Autocollimator with wide visual field |
| CN109633856A (en) * | 2018-12-25 | 2019-04-16 | 中国工程物理研究院激光聚变研究中心 | A kind of coaxial adjustment method of Offner stretcher concave, convex face reflecting mirror |
| CN112255779A (en) * | 2020-11-27 | 2021-01-22 | 中国科学院微电子研究所 | Large diameter compact Soleil-Barbinet compensator device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5841575A (en) * | 1995-12-21 | 1998-11-24 | Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek (Tno) | Telescope with a large field of vision |
| CN102252756A (en) * | 2011-05-03 | 2011-11-23 | 中国科学院合肥物质科学研究院 | Front-mounted optical system of satellite-borne differential absorption spectrometer |
-
2013
- 2013-03-04 CN CN2013100664027A patent/CN103197410A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5841575A (en) * | 1995-12-21 | 1998-11-24 | Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek (Tno) | Telescope with a large field of vision |
| CN102252756A (en) * | 2011-05-03 | 2011-11-23 | 中国科学院合肥物质科学研究院 | Front-mounted optical system of satellite-borne differential absorption spectrometer |
Non-Patent Citations (2)
| Title |
|---|
| BART SNIJDERS AND HUIB VISSER: "Imaging spectrometer with a large field of view", 《SPIE》, vol. 2830, 31 December 1996 (1996-12-31), pages 331 - 340 * |
| JAMES P. MCGUIRE, JR. AND RUSSELL A. CHIPMAN: "Analysis of spatial pseudodepolarizers in imaging systems", 《OPTICAL ENGINEERING》, vol. 29, no. 12, 31 December 1990 (1990-12-31), pages 1478 - 1484, XP000169289, DOI: doi:10.1117/12.55756 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105472210A (en) * | 2014-09-12 | 2016-04-06 | 光宝电子(广州)有限公司 | Image capture device |
| CN107850770A (en) * | 2015-03-27 | 2018-03-27 | Drs网络和成像系统公司 | Autocollimator with wide visual field |
| CN107850770B (en) * | 2015-03-27 | 2020-01-07 | Drs网络和成像系统公司 | Reflective telescope with wide field of view |
| US10962760B2 (en) | 2015-03-27 | 2021-03-30 | Drs Network & Imaging Systems, Llc | Reflective telescope with wide field of view |
| CN104834105A (en) * | 2015-04-03 | 2015-08-12 | 北京空间机电研究所 | Imaging system using array lens to realize polarization detection |
| CN104834105B (en) * | 2015-04-03 | 2017-04-05 | 北京空间机电研究所 | A kind of utilization array lenses realize the imaging system of Polarization Detection |
| CN105372799A (en) * | 2015-12-14 | 2016-03-02 | 中国科学院光电技术研究所 | Off-axis reflection type wide-angle optical lens |
| CN107728300A (en) * | 2017-10-26 | 2018-02-23 | 宁波源禄光电有限公司 | A kind of compact reflective off-axis telescopic system of wide visual field object lens of large relative aperture |
| CN107728300B (en) * | 2017-10-26 | 2019-12-06 | 宁波源禄光电有限公司 | Small reflective off-axis telescopic system with wide view field and large relative aperture |
| CN109633856A (en) * | 2018-12-25 | 2019-04-16 | 中国工程物理研究院激光聚变研究中心 | A kind of coaxial adjustment method of Offner stretcher concave, convex face reflecting mirror |
| CN109633856B (en) * | 2018-12-25 | 2020-11-13 | 中国工程物理研究院激光聚变研究中心 | Method for debugging coaxiality of concave and convex reflectors of Ohionano stretcher |
| CN112255779A (en) * | 2020-11-27 | 2021-01-22 | 中国科学院微电子研究所 | Large diameter compact Soleil-Barbinet compensator device |
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Application publication date: 20130710 |