CN102736237A - Optical system for space astronomical observation infra-red telescope - Google Patents
Optical system for space astronomical observation infra-red telescope Download PDFInfo
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- CN102736237A CN102736237A CN2012102036691A CN201210203669A CN102736237A CN 102736237 A CN102736237 A CN 102736237A CN 2012102036691 A CN2012102036691 A CN 2012102036691A CN 201210203669 A CN201210203669 A CN 201210203669A CN 102736237 A CN102736237 A CN 102736237A
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Abstract
The invention discloses an optical system for a space astronomical observation infra-red telescope, which comprises a reflection-type focal-free main optical system (1), a single-axis scanning mirror (2) and a subsequent imaging optical system (3), wherein in the reflection-type focal-free main optical system (1), ray is incident into a reflexing mirror (6) via an eccentric light through hole after being successively reflected by a main mirror (4) and a secondary mirror (5), and is reflected into the single-axis scanning mirror (2) successively by the reflexing mirror (6) and a prism (7); the single-axis scanning mirror (2) ensures that the aiming line of the optical system of the space astronomical observation infra-red telescope is constant by one-dimensional linear scanning; the incident ray of the reflection-type focal-free main optical system (1) is reflected to the subsequent imaging optical system (3); the subsequent imaging optical system (3) comprises an off-axis reflection type system, a color separation filter and a focal plane; the off-axis reflection type system corrects the aberration of the reflection-type focal-free main optical system (1); and the emergent ray of the reflection-type focal-free main optical system (1) is divided into two or more than two spectral channels by the color separation filter to be imaged to a corresponding focal plane.
Description
Technical field
The invention belongs to the space flight optical remote sensor technical field, relate to a kind of space astronomical observation low temperature infrared telescope optical system that is applicable to.
Background technology
Along with the development that infrared eye is technological, cryogenic optics is technological and space refrigeration is technological, increasingly high to the sensitivity requirement of astronomical sight infrared telescope, with the faint infrared signal that galaxy sent of the comet of detection from the solar system to the edge, universe.
Space infrared astronomy scope can be realized the detection of touring the heavens of whole day district, surveys cold faint object target, finds new planetary system, brown dwarf and fixed star.Main application is physics and the chemical evolution process of research interstellar matter, the origin of organic molecule in the universe, brown dwarf and be the evolutionary process etc. of outer planet system.
Succeeding in developing of low temperature infrared optical system makes the cosmic space infrared research become possibility, and astronomical infrared telescope comes out thereupon.The optical lens bore only is 300mm at present; And the primary mirror of astronomical sight infrared telescope generally have more than the 400mm in addition more than 2m; The increase of bore will bring bigger difficulty for the processing of low temperature camera lens and the design of optical lens low temperature supporting construction, at present domesticly also not carry out correlative study for the larger caliber cryogenic optics technology more than the 400mm; In order to survey extrasolar even extragalactic remote fixed star or planet, need make the optical system working temperature drop to tens K even a few K, so low temperature requirement whole optical system is compressed in the cryogenic refrigeration jar and carries out work.The research work of profound hypothermia optical technology at present just just begins; For the effectively stray radiation of inhibition system and the beam split of realization different spectral coverage; The structure of astronomical telescope needs to be compressed through light path repeatedly, makes light path compact as far as possible, does not influence image quality again; The final secondary imaging system that forms complicacy, so complicated version is brought big difficult to optical design.
Summary of the invention
Technology of the present invention is dealt with problems and is: overcome the deficiency of prior art, the infrared astronomy observation infrared telescope optical system that a kind of wide spectrum, hyperchannel are provided, can under the profound hypothermia environment, work.
Technical solution of the present invention is: the optical system of space astronomical observation infrared telescope, comprise reflective no burnt primary optical system, single shaft scanning lens and follow-up imaging optical system,
Reflective no burnt primary optical system comprises primary mirror, is positioned at the secondary mirror of primary mirror one side; And turn back mirror and three mirrors that are positioned at the primary mirror opposite side; Wherein the center of primary mirror and secondary mirror is coaxial and as the primary optical axis of reflective no burnt primary optical system; Primary mirror is provided with an eccentric light hole, light rays after primary mirror, inferior mirror reflection, be incident on the mirror of turning back by eccentric light hole and successively by the mirror of turning back, three mirror reflections to single shaft scanning lens;
Single shaft scanning lens is positioned at the emergent pupil place of reflective no burnt primary optical system and the entrance pupil place of follow-up imaging optical system simultaneously, and single shaft scanning lens is constant through the boresight of the optical system of one-dimensional linear scanning assurance space astronomical observation infrared telescope; Single shaft scanning lens reflexes to follow-up imaging optical system with the incident ray of reflective no burnt primary optical system;
Follow-up imaging optical system comprises off-axis reflection system, color separation film and focal plane; Described off-axis reflection system receives light that single shaft scanning lens reflects and the aberration of reflective no burnt primary optical system is proofreaied and correct, and the emergent ray of off-axis reflection system is divided into two or above spectrum channel through one or more color separation film and forms images respectively to corresponding focal plane.
Off-axis reflection system in the described follow-up imaging optical system comprises two curved reflectors at least, and the face type of curved reflector is sphere or aspheric surface.
Also be provided with the polylith curved reflector between described three mirrors and the single shaft scanning lens, the face type of curved reflector is sphere or aspheric surface.
The face type of described single shaft scanning lens is the plane.
The present invention's advantage compared with prior art is:
(1) the reflective no burnt primary optical system of the present invention is made up of from axle three mirror reflection optical systems coaxial two mirror reflection systems and one; Form five mirror reflections and do not had burnt primary optical system; Compensated the distortion that coaxial two mirror reflection systems produce from axle three trans Design for optical system, this design form can be controlled the distortion of this afocal system in big field range effectively;
(2) the present invention is owing to adopted five mirror reflections not have burnt primary optical system; In the compression bore; Compressed the volume of light path effectively; Effectively control system can be placed field stop to eliminate parasitic light in the wave aberration at emergent pupil place through the intermediate image plane place that master, secondary mirror produce, and can limit the bore of single shaft scanning lens through control pupil aberration;
(3) adopted single shaft scanning lens in the optical system of the present invention; When three-axis stabilization formula platform rotates with given pace; Single shaft scanning lens can be when making public each time the boresight of rigid telescope, with the aiming off line because the skew that platform motion causes, conveniently to carry out the data processing on ground;
(4) optical system of the present invention is the low temperature infrared telescope in space; The optical system entrance pupil is positioned on the primary mirror; Reasonable cooperation through three ingredients; This optical system light path has been carried out effectively turning back and compressing, made whole optical system can put into a vacuum tank that is equivalent to the primary mirror caliber size to realize the low temperature imaging; Because adopted the version of modular, each module can be debug and detect independently, and enough spaces are provided for the physical construction of single shaft scanning lens.The shared identical visual field of follow-up image optics passage, color separation film and secondary color separation film are divided into 3 independent imaging passages with light path, and 3 imaging focal planes all are positioned at the aft section of cryogenic refrigeration jar, have made things convenient for arranging of Design of Mechanical Structure and electronic circuit.
Description of drawings
Fig. 1 is the structural drawing of optical system of the present invention;
Fig. 2 is the structural drawing of the reflective no burnt primary optical system of optical system of the present invention;
Fig. 3 is the structural drawing of the follow-up imaging optical system of optical system of the present invention.
Embodiment
Optical system of the present invention mainly is made up of no defocused laser beam compression primary optical system and follow-up imaging optical system, and can work in several K and be not more than to tens K, bore in 1 meter the cylindrical cryogenic refrigeration jar, and optical system of the present invention is a Cryogenic Optical System.
As shown in Figure 1, optical system of the present invention is made up of reflective no burnt primary optical system 1, single shaft scanning lens 2, follow-up imaging optical system 3 jointly.Wherein reflective no burnt primary optical system 1 is that an entrance pupil diameter is 720mm, and the light beam ratio of compression is 7, and field angle is the burnt telescopic system of 0.8 ° * 0.8 ° nothing.According to no burnt telescopic system image-forming principle, this system is the intermediate image system, eliminates parasitic light with convenient in this intermediate image plane place placement field stop.Single shaft scanning lens 2 is between reflective no burnt primary optical system 1 and follow-up imaging optical system 3, and this single shaft scanning lens 2 can be so that optical system be accomplished the observation view field imaging at 0.8 ° * 1.6 °.Follow-up imaging optical system 3 is that a field angle is 5.6 ° * 5.6 °, and relative aperture is 1/3 triple channel imaging optical system, and the centre wavelength of three passages is respectively 3.1 μ m, 4.5 μ m and 10 μ m.
As shown in Figure 2; Reflective no burnt primary optical system 1 comprises primary mirror 4, secondary mirror 5, turn back mirror 6, three mirrors 7; In order to compress the needs of light path; Can increase by four mirrors 8, five mirrors 9 and more catoptron (it is fixed that quantity is come according to the complexity of design objective), wherein the surface type of catoptrons such as primary mirror 4, secondary mirror 5, three mirrors 7, four mirrors 8 and five mirrors 9 all adopts secondary aspherical or other aspheric surface face type, and the surface type of the mirror 6 of turning back adopts the plane.Single shaft scanning lens 2 is positioned at the emergent pupil place of reflective no burnt primary optical system 1, is positioned at the entrance pupil place of follow-up imaging optical system 3 simultaneously.Each focal plane all is carried out to picture to 0.8 ° * 0.8 ° true field simultaneously; When aircraft with certain speed operation during with the orbital velocity of package space astronomical sight low temperature infrared telescope; Single shaft scanning lens 2 can be in integral time be swung with the fixing aligning direction of primary optical axis with the speed that equates, correspondence visual field, focal plane can scan the other end by the end from observation field in integral time.
As shown in Figure 3, follow-up imaging optical system module 3 comprises the mirror 10 of turning back, primary event mirror 11, secondary reflection mirror 12, triplex reflector 13, four secondary mirror 14, five secondary mirror 15, color separation film 16, secondary color separation film 17, shortwave focal plane 18, medium wave focal plane 19 and a long wave focal plane 20.Wherein the surface type of primary event mirror 11, secondary reflection mirror 12, triplex reflector 13, four secondary mirror 14 and five secondary mirror 15 adopts secondary aspherical or other aspheric surface face type, and these several catoptrons have been formed an off-axis reflection optical system.When design; This reflective optical system can be considered to be made up of the catoptron that is higher than 2 and (is not limited to five catoptrons here; It is fixed that concrete quantity is come according to the complexity of design objective), proofreading and correct the aberration that reflective no burnt primary optical system module is brought, and compression light path volume; One time color separation film 16 is divided into three passage imagings with secondary color separation film 17 with whole optical system; Focal plane 18 is a short-wave infrared passage imaging surface, and focal plane 19 is a medium wave infrared channel imaging surface, and focal plane 20 is a LONG WAVE INFRARED passage imaging surface.
The content of not doing to describe in detail in the instructions of the present invention belongs to those skilled in the art's known technology.
Claims (4)
1. the optical system of space astronomical observation infrared telescope is characterized in that comprising: reflective no burnt primary optical system (1), single shaft scanning lens (2) and follow-up imaging optical system (3),
Reflective no burnt primary optical system (1) comprises primary mirror (4), is positioned at the secondary mirror (5) of primary mirror (4) one sides; And the mirror of turning back (6) and three mirrors (7) that are positioned at primary mirror (4) opposite side; Wherein the center of primary mirror (4) and secondary mirror (5) is coaxial and as the primary optical axis of reflective no burnt primary optical system (1); Primary mirror (4) is provided with an eccentric light hole, and light rays is incident to the mirror of turning back (6) by eccentric light hole and upward also reflexes to single shaft scanning lens (2) by the mirror of turning back (6), three mirrors (7) successively after primary mirror (4), secondary mirror (5) reflection;
Single shaft scanning lens (2) is positioned at the emergent pupil place of reflective no burnt primary optical system (1) and the entrance pupil place of follow-up imaging optical system (3) simultaneously, and single shaft scanning lens (2) is constant through the boresight of the optical system of one-dimensional linear scanning assurance space astronomical observation infrared telescope; Single shaft scanning lens (2) reflexes to follow-up imaging optical system (3) with the incident ray of reflective no burnt primary optical system (1);
Follow-up imaging optical system (3) comprises off-axis reflection system, color separation film and focal plane; Described off-axis reflection system receives light that single shaft scanning lens (2) reflects and the aberration of reflective no burnt primary optical system (1) is proofreaied and correct, and the emergent ray of off-axis reflection system is divided into two or above spectrum channel through one or more color separation film and forms images respectively to corresponding focal plane.
2. the optical system of space astronomical observation infrared telescope according to claim 1; It is characterized in that: the off-axis reflection system in the described follow-up imaging optical system (3) comprises two curved reflectors at least, and the face type of curved reflector is sphere or aspheric surface.
3. the optical system of space astronomical observation infrared telescope according to claim 1 and 2 is characterized in that: also be provided with the polylith curved reflector between described three mirrors (7) and the single shaft scanning lens (2), the face type of curved reflector is sphere or aspheric surface.
4. the optical system of space astronomical observation infrared telescope according to claim 1 and 2 is characterized in that: the face type of described single shaft scanning lens (2) is the plane.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103345050A (en) * | 2013-07-10 | 2013-10-09 | 北京空间机电研究所 | Space refraction and reflection type multichannel imaging optical system |
| CN103760668A (en) * | 2014-02-21 | 2014-04-30 | 哈尔滨工业大学 | Large-diameter long-focus continuous scanning imaging optical system |
| CN107167904A (en) * | 2017-06-22 | 2017-09-15 | 中国科学院长春光学精密机械与物理研究所 | A kind of reflective multispectral optical system of Shared aperture |
| CN107703643A (en) * | 2017-11-03 | 2018-02-16 | 中国运载火箭技术研究院 | A kind of high-resolution multiband optics complex imaging detection system and its method |
| CN107817598A (en) * | 2017-09-29 | 2018-03-20 | 中国科学院长春光学精密机械与物理研究所 | A kind of long-focus Shared aperture reflective optical system |
| CN108519664A (en) * | 2018-04-10 | 2018-09-11 | 中国科学院长春光学精密机械与物理研究所 | The integrated three-mirror reflection infra red optical imaging device of main three mirrors |
| CN108957725A (en) * | 2018-07-25 | 2018-12-07 | 中国科学院国家天文台南京天文光学技术研究所 | Improved Schmidt telescopic optical system |
| CN109283671A (en) * | 2018-11-09 | 2019-01-29 | 中国科学院长春光学精密机械与物理研究所 | A kind of quasi-coaxial five reflecting optical system of the low distortion of light and small-sized big angular field |
| CN109557648A (en) * | 2018-12-31 | 2019-04-02 | 中国科学院长春光学精密机械与物理研究所 | A kind of low five reflecting optical system of distortion compact of long-focus |
| CN110794576A (en) * | 2019-11-01 | 2020-02-14 | 中国科学院光电技术研究所 | Optical synthetic aperture imaging telescope array eccentricity error detection method based on phase modulation |
| CN110989157A (en) * | 2019-12-17 | 2020-04-10 | 孝感华中精密仪器有限公司 | Method for correcting consistency of optical axes of rear fixed group of folding and rotating zoom camera lens |
| US20210263292A1 (en) * | 2018-06-27 | 2021-08-26 | Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno | A focal in-field pointing telescope system |
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| CN103345050B (en) * | 2013-07-10 | 2015-03-18 | 北京空间机电研究所 | Space refraction and reflection type multichannel imaging optical system |
| CN103345050A (en) * | 2013-07-10 | 2013-10-09 | 北京空间机电研究所 | Space refraction and reflection type multichannel imaging optical system |
| CN103760668A (en) * | 2014-02-21 | 2014-04-30 | 哈尔滨工业大学 | Large-diameter long-focus continuous scanning imaging optical system |
| CN103760668B (en) * | 2014-02-21 | 2015-12-09 | 哈尔滨工业大学 | Large-aperture long-focus continuous sweep imaging optical system |
| CN107167904B (en) * | 2017-06-22 | 2020-02-14 | 中国科学院长春光学精密机械与物理研究所 | Common-aperture reflection type multi-spectrum optical system |
| CN107167904A (en) * | 2017-06-22 | 2017-09-15 | 中国科学院长春光学精密机械与物理研究所 | A kind of reflective multispectral optical system of Shared aperture |
| CN107817598A (en) * | 2017-09-29 | 2018-03-20 | 中国科学院长春光学精密机械与物理研究所 | A kind of long-focus Shared aperture reflective optical system |
| CN107703643A (en) * | 2017-11-03 | 2018-02-16 | 中国运载火箭技术研究院 | A kind of high-resolution multiband optics complex imaging detection system and its method |
| CN108519664B (en) * | 2018-04-10 | 2020-07-07 | 中国科学院长春光学精密机械与物理研究所 | Main three-mirror integrated coaxial three-reflection infrared optical imaging device |
| CN108519664A (en) * | 2018-04-10 | 2018-09-11 | 中国科学院长春光学精密机械与物理研究所 | The integrated three-mirror reflection infra red optical imaging device of main three mirrors |
| US20210263292A1 (en) * | 2018-06-27 | 2021-08-26 | Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno | A focal in-field pointing telescope system |
| US11774734B2 (en) * | 2018-06-27 | 2023-10-03 | Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno | Focal in-field pointing telescope system |
| CN108957725A (en) * | 2018-07-25 | 2018-12-07 | 中国科学院国家天文台南京天文光学技术研究所 | Improved Schmidt telescopic optical system |
| CN109283671A (en) * | 2018-11-09 | 2019-01-29 | 中国科学院长春光学精密机械与物理研究所 | A kind of quasi-coaxial five reflecting optical system of the low distortion of light and small-sized big angular field |
| CN109283671B (en) * | 2018-11-09 | 2020-01-07 | 中国科学院长春光学精密机械与物理研究所 | Light small-sized large-view-field low-distortion coaxial five-mirror optical system |
| CN109557648A (en) * | 2018-12-31 | 2019-04-02 | 中国科学院长春光学精密机械与物理研究所 | A kind of low five reflecting optical system of distortion compact of long-focus |
| CN110794576A (en) * | 2019-11-01 | 2020-02-14 | 中国科学院光电技术研究所 | Optical synthetic aperture imaging telescope array eccentricity error detection method based on phase modulation |
| CN110989157A (en) * | 2019-12-17 | 2020-04-10 | 孝感华中精密仪器有限公司 | Method for correcting consistency of optical axes of rear fixed group of folding and rotating zoom camera lens |
| CN115793722A (en) * | 2023-02-13 | 2023-03-14 | 中国科学院云南天文台 | High-precision tracking method and system for ground level type solar telescope storehouse de-focus surface |
| CN115793722B (en) * | 2023-02-13 | 2023-04-11 | 中国科学院云南天文台 | High-precision tracking method and system for ground level type solar telescope storehouse de-focus surface |
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