CN102519592A - Compact wide-field large-calibre high-resolution spectral imaging system - Google Patents
Compact wide-field large-calibre high-resolution spectral imaging system Download PDFInfo
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- CN102519592A CN102519592A CN201110442008XA CN201110442008A CN102519592A CN 102519592 A CN102519592 A CN 102519592A CN 201110442008X A CN201110442008X A CN 201110442008XA CN 201110442008 A CN201110442008 A CN 201110442008A CN 102519592 A CN102519592 A CN 102519592A
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Abstract
The invention relates to a compact wide-field large-calibre high-resolution spectral imaging system comprising a primary mirror, a secondary mirror and a three mirror. The primary mirror and the three mirror shares a same reflector; and the reflector and the secondary mirror are concentric. The focal length of the secondary mirror is half of the focal length of the reflector; and the secondary mirror, which is at a focus position of the reflector, is a convex surface raster that is a laminar raster. According to the invention, the volume and the weight of a hyperspectral camera are obviously reduced; a lightening and miniaturization design of a wide-field large-calibre high-resolution spectral imaging system is realized; occurrences of color distortion and spectral line bending of the spectral imaging system can be reduced; and a line view field can reach 60 mm as well as the spectral line bending and the color distortion are less than 1% pixel.
Description
Technical field
The invention belongs to the space optical remote sensor technical field, relate to the big visual field of a kind of compact heavy caliber high-resolution spectroscopy imaging system.
Background technology
High spectrum resolution remote sensing technique is a new development direction of optical remote sensing technology in recent years.High-spectrum remote sensing data all has very large application demand in fields such as land resources, meteorology, environment mitigation and military surveillances.Demestic user unit is difficult to buy suitable high-spectral data at present, even buy, also is the data of doing time-delay and technical finesse.Therefore, China demands developing the high spectrum satellite camera of oneself urgently, to satisfy the demand of the growing high-spectral data in military and civilian field.As the useful load of satellite, high spectrum camera needs reaching big fabric width, high-resolutionly realizing miniaturization and lightweight simultaneously.High spectrum camera is made up of primary optical system and spectrum imaging system, and its volume and quality are mainly by the mechanical-optical setup decision, so the selection of spectrum imaging system is directly connected to the volume and the quality of high spectrum camera.And for traditional spectrum imaging system that in collimated light beam, uses grating or prism; The fabric width of high spectrum camera is big more; The linear field of spectrum imaging system is just big more, and the physical dimension of system is also just big more, and the chromatic variation of distortion of spectrum imaging system and spectral line bending are also increasing.
Summary of the invention
The objective of the invention is to overcome the above-mentioned deficiency of prior art; The big visual field of a kind of compact heavy caliber high-resolution spectroscopy imaging system is provided; Obviously reduced the volume and weight of high spectrum camera; Realized the small light design of big visual field heavy caliber high-resolution spectroscopy imaging system, the chromatic variation of distortion and the spectral line that have reduced spectrum imaging system are crooked.
Above-mentioned purpose of the present invention is achieved through following technical scheme:
The big visual field of a kind of compact heavy caliber high-resolution spectroscopy imaging system; Comprise primary mirror, secondary mirror and three mirrors; Wherein primary mirror and three mirrors are shared with a slice catoptron, and catoptron is concentric with secondary mirror, and the focal length of secondary mirror is the half the of reflecting mirror focal length; Secondary mirror is positioned at the along of catoptron, and secondary mirror is a convex grating.
In the heavy caliber high-resolution spectroscopy imaging system of the big visual field of above-mentioned compact, convex grating is the laminar grating.
In the heavy caliber high-resolution spectroscopy imaging system of the big visual field of above-mentioned compact, linear field reaches 60mm, and spectral line bending and chromatic variation of distortion are less than 1% pixel.
The present invention compared with prior art has following beneficial effect:
(1) spectrum imaging system of the present invention makes primary mirror, three mirror utilizations with a slice catoptron; Catoptron, secondary mirror are concentric, and the secondary mirror focal length is the half the of reflecting mirror focal length, and secondary mirror is positioned at the along of catoptron 1; Than traditional spectrum imaging system that in collimated light beam, uses grating or prism; Can effectively reduce the camera size, thereby reduce the volume and weight of high spectrum camera, satisfy satellite useful load miniaturization, light-weighted demand;
(2) spectrum imaging system of the present invention is because primary mirror and three mirrors utilize same catoptron, and the optics that more helps system is debug, and whole optical system debug comparatively simple and easy;
(3) beam splitter in the spectrum imaging system of the present invention adopts laminar grating, the second order spectrum in the effectively elimination system.
A large amount of experiments show that spectrum imaging system linear field of the present invention can reach 60mm, and spectral line bending and chromatic variation of distortion are less than 1% pixel.
Description of drawings:
Fig. 1 is the structural representation of spectrum imaging system of the present invention;
Fig. 2 is the light path synoptic diagram of spectrum imaging system of the present invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:
Be illustrated in figure 1 as the structural representation of spectrum imaging system of the present invention; Can know that by figure imaging system comprises primary mirror 3, secondary mirror 2 and three mirrors 4, wherein primary mirror 3 and three mirrors 4 are shared with a slice catoptron 1, and catoptron 1 is concentric with secondary mirror 2; And the focal length of secondary mirror 2 is the half the of catoptron 1 focal length; Secondary mirror 2 is positioned at the along of catoptron 1, thereby realizes the small light of big visual field heavy caliber high-resolution spectroscopy imaging system, and secondary mirror 2 is a convex grating in the spectrum imaging system; Select the laminar grating for use, can eliminate the second-order diffraction image.
Be illustrated in figure 2 as the light path synoptic diagram of spectrum imaging system of the present invention; The principle of spectrum imaging system of the present invention is following: light is from object plane 5 outgoing; Reflex on the secondary mirror 2 through primary mirror 3, become light beams of different wavelengths through secondary mirror 2 reflection chromatic dispersions again, after three mirrors, 4 catoptric imagings on image planes 6.
Spectrum imaging system linear field of the present invention can reach 60mm, and spectral line bending and chromatic variation of distortion are less than 1% pixel.The present invention can obviously reduce the volume and weight of high spectrum camera, satisfies satellite to useful load miniaturization, light-weighted demand; In addition optical system of the present invention debug comparatively simple and easy; Second order spectrum in the effectively elimination system of the present invention in addition.
The above; Be merely the best embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technician who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.
The content of not doing in the instructions of the present invention to describe in detail belongs to this area professional and technical personnel's known technology.
Claims (3)
1. the big visual field of compact heavy caliber high-resolution spectroscopy imaging system; It is characterized in that: comprise primary mirror (3), secondary mirror (2) and three mirrors (4); Wherein primary mirror (3) is shared with a slice catoptron (1) with three mirrors (4), and catoptron (1) is concentric with secondary mirror (2), and the focal length of secondary mirror (2) is the half the of catoptron (1) focal length; Secondary mirror (2) is positioned at the along of catoptron (1), and secondary mirror (2) is a convex grating.
2. the big visual field of a kind of compact according to claim 1 heavy caliber high-resolution spectroscopy imaging system, it is characterized in that: said convex grating is the laminar grating.
3. the big visual field of a kind of compact according to claim 1 heavy caliber high-resolution spectroscopy imaging system, it is characterized in that: linear field reaches 60mm, and spectral line bending and chromatic variation of distortion are less than 1% pixel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110442008XA CN102519592A (en) | 2011-12-23 | 2011-12-23 | Compact wide-field large-calibre high-resolution spectral imaging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110442008XA CN102519592A (en) | 2011-12-23 | 2011-12-23 | Compact wide-field large-calibre high-resolution spectral imaging system |
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| CN102519592A true CN102519592A (en) | 2012-06-27 |
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| CN201110442008XA Pending CN102519592A (en) | 2011-12-23 | 2011-12-23 | Compact wide-field large-calibre high-resolution spectral imaging system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103604498A (en) * | 2013-12-04 | 2014-02-26 | 上海理工大学 | Broad-spectrum light-splitting system for Offner imaging spectrometer |
| CN103852163A (en) * | 2014-03-14 | 2014-06-11 | 苏州大学 | Miniature beam splitting system suitable for miniature imaging spectrometer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7199877B2 (en) * | 2004-10-20 | 2007-04-03 | Resonon Inc. | Scalable imaging spectrometer |
| CN101216595A (en) * | 2007-12-29 | 2008-07-09 | 苏州大学 | Minisized hyper-spectral image-forming system |
| CN101303449A (en) * | 2008-07-10 | 2008-11-12 | 北京空间机电研究所 | Double-visual field off-axis three-mirror integrated type optical system for sharing primary and secondary lens |
-
2011
- 2011-12-23 CN CN201110442008XA patent/CN102519592A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7199877B2 (en) * | 2004-10-20 | 2007-04-03 | Resonon Inc. | Scalable imaging spectrometer |
| CN101216595A (en) * | 2007-12-29 | 2008-07-09 | 苏州大学 | Minisized hyper-spectral image-forming system |
| CN101303449A (en) * | 2008-07-10 | 2008-11-12 | 北京空间机电研究所 | Double-visual field off-axis three-mirror integrated type optical system for sharing primary and secondary lens |
Non-Patent Citations (1)
| Title |
|---|
| 兰卫华等: "凸面光栅的衍射效率计算及其二级光谱抑制", 《红外技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103604498A (en) * | 2013-12-04 | 2014-02-26 | 上海理工大学 | Broad-spectrum light-splitting system for Offner imaging spectrometer |
| CN103852163A (en) * | 2014-03-14 | 2014-06-11 | 苏州大学 | Miniature beam splitting system suitable for miniature imaging spectrometer |
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Application publication date: 20120627 |