CN102928077B - Binary channels is light path miniaturization broadband imaging spectrometer optical system altogether - Google Patents
Binary channels is light path miniaturization broadband imaging spectrometer optical system altogether Download PDFInfo
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- CN102928077B CN102928077B CN201210487905.7A CN201210487905A CN102928077B CN 102928077 B CN102928077 B CN 102928077B CN 201210487905 A CN201210487905 A CN 201210487905A CN 102928077 B CN102928077 B CN 102928077B
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Abstract
Binary channels altogether light path miniaturization broadband imaging spectrometer optical system, relates to space optics technical field, and it solves existing broadband imaging spectrometer optical system complex structure, problem that volume and weight is large.Native system comprises the first broad band pass filter, second broad band pass filter, first aperture diaphragm, second aperture diaphragm, telescope, entrance slit, first collimating mirror, second collimating mirror, plane grating, imaging lens and detector image planes, the light beam of same target outgoing is divided into two passages through the first broad band pass filter and the second broad band pass filter and incides on telescope through the first aperture diaphragm and the second aperture diaphragm respectively, be imaged onto on entrance slit through telescope, described light beam is after entrance slit outgoing, incide in the zones of different of plane grating after the first collimating mirror and the second collimating mirror respectively, imaging lens is incident to after plane grating dispersion, be imaged in same detector image planes through imaging lens.System of the present invention is applied in space flight, aviation atmospheric remote sensing field.<!--1-->
Description
Technical field
The present invention relates to space optics technical field, be specifically related to a kind of reflective miniaturization broadband imaging spectrometer optical system in space optics.
Background technology
Imaging spectrometer is the new spatial remote optical sensing instrument of collection of illustrative plates unification, in fields such as room atmosphere remote sensing, ocean remote sensings, over the ground investigation, is obtaining applying more and more widely.Along with the development of space remote sensing application, also more and more higher to the requirement of imaging spectrometer optical system, wave band is more and more wider, ultraviolet band is extend to from visible waveband, wave band is wider, the spectral information of the target comprised is abundanter, realize ultraviolet to visible broadband signal and detect simultaneously.In fields such as the broadband room atmosphere remote sensing comprising ultraviolet band, such as at wave band 280 ~ 1000nm, face within the scope of the height 0 ~ 90km of limit, the dynamic range of signal reaches 10
5~ 10
6magnitude.For realizing detecting the broadband great dynamic range imaging spectral of target, at present, domestic and international existing broadband imaging spectrometer optical system adopts complicated scanning mirror mechanism and multiple color separation film, and volume and weight is large, is not suitable for space flight, airborne remote sensing application.
Summary of the invention
The problem that the present invention is the existing broadband imaging spectrometer complex structure of solution, volume and weight is large, provides a kind of binary channels light path miniaturization broadband imaging spectrometer optical system altogether.
Binary channels is light path miniaturization broadband imaging spectrometer optical system altogether, and this optical system comprises the first broad band pass filter, the second broad band pass filter, the first aperture diaphragm, the second aperture diaphragm, telescope, entrance slit, the first collimating mirror, the second collimating mirror, plane grating, imaging lens and detector image planes; The light beam of same target outgoing is divided into two passages through the first broad band pass filter and the second broad band pass filter and incides on telescope through the first aperture diaphragm and the second aperture diaphragm respectively, be imaged onto on entrance slit through telescope, described light beam is after entrance slit outgoing, incide in the zones of different of plane grating after the first collimating mirror and the second collimating mirror respectively, after plane grating dispersion, be incident to imaging lens, be imaged in same detector image planes through imaging lens.
Principle of work of the present invention: the present invention be the target energy blur-free imaging of broadband great dynamic range in the detector image planes of miniaturization imaging spectrometer, have employed the system architecture that binary channels is total to light path, be divided into two passages to detect, two corresponding two wave bands of passage, the relative aperture of the aperture diaphragm of two passages can be selected as required.For realizing miniaturization and lightweight, two passages share same telescope, entrance slit, imaging lens and detector image planes.Two passages use two regions of same grating respectively, and the grating line density in two regions can be selected as required.Two passages respectively adopt a broad band pass filter to eliminate the impact of grating second order spectrum.This optical system presses xyz right hand space coordinates ordered arrangement, and z-axis direction is decided to be optical axis direction, and x-axis is perpendicular to yz plane, and entrance slit length direction is along the length direction of y-axis, and plane grating dispersion direction is along the length direction of x-axis.Imaging lens and detector image plane center be not in yz plane, and the center of all the other elements is in yz plane.
Beneficial effect of the present invention: optical system of the present invention can realize the broadband great dynamic range imaging spectral detection comprising ultraviolet band, and the dynamic range of detectable signal reaches 10
5~ 10
6, binary channels of the present invention is light path system compact in design altogether, possesses miniaturization, light-weighted feature.
Accompanying drawing explanation
Fig. 1 is the structural representation that binary channels of the present invention is total to light path miniaturization broadband imaging spectrometer optical system.
In figure, the 1, first broad band pass filter, the 2, second broad band pass filter, the 3, first aperture diaphragm, 4, the second aperture diaphragm, 5, telescope, 6, entrance slit, the 7, first collimating mirror, 8, the second collimating mirror, 9, plane grating, 10, imaging lens, 11, detector image planes.
Embodiment
Embodiment one, composition graphs 1 illustrates present embodiment, binary channels is light path miniaturization broadband imaging spectrometer optical system altogether, this optical system comprises the first broad band pass filter 1, second broad band pass filter 2, first aperture diaphragm 3, second aperture diaphragm 4, telescope 5, entrance slit 6, first collimating mirror 7, second collimating mirror 8, plane grating 9, imaging lens 10 and detector image planes 11, the light beam of described same target outgoing is divided into two passages through the first broad band pass filter 1 and the second broad band pass filter 2 and incides on same telescope 5 through the first aperture diaphragm 3 and the first aperture diaphragm 4 respectively, be imaged onto on entrance slit 6 through telescope 5, after entrance slit 6 outgoing, incide in two zoness of different of same plane grating 9 after the first collimating mirror 7 and the second collimating mirror 8 respectively, imaging lens 10 is incident to after plane grating 9 dispersion, be imaged in same detector image planes 11 through imaging lens.
Telescope 5 described in present embodiment and the reflecting surface arranged opposite of the first collimating mirror 7 and the second collimating mirror 8, first collimating mirror 7 and the reflecting surface of the second collimating mirror 8 and the diffraction surfaces arranged opposite of plane grating 9, the diffraction surfaces of plane grating 9 and the reflecting surface arranged opposite of imaging lens 10, the reflecting surface of imaging lens 10 and detector image planes 11 arranged opposite.
The wavelength band of two passages described in present embodiment is respectively the transmission wave band of described first broad band pass filter 1 and the second broad band pass filter 2.
Telescope 5 described in present embodiment is off axis paraboloidal mirror, and the first collimating mirror 7, second collimating mirror 8 and imaging lens 10 are off-axis aspheric mirror.Two zoness of different of described plane grating 9 can select different grating line density as required.
Embodiment two, composition graphs 1 illustrate present embodiment, present embodiment is the application of the common light path miniaturization broadband imaging spectrometer optical system of the binary channels described in embodiment one, system described in embodiment one is applied to space remote sensing air and faces limit imaging spectral detection, imaging spectrometer optical system focal length 68.8mm described in present embodiment, 2.4 ° × 0.02 °, visual field, service band 280 ~ 1000nm.Air faces limit scene and is divided into two passages through the first broad band pass filter 1, second broad band pass filter 2 and incides on telescope 5, the wavelength band of first passage is 280 ~ 540nm, the wavelength band of second channel is 535 ~ 1000nm, the bore of the first aperture diaphragm 3 is 8.8mm, the bore of the second aperture diaphragm 4 is 4.6mm, reaches the object strengthening weak signal.Telescope 5 is off axis paraboloidal mirror, and radius-of-curvature is 137.6mm, and quadric surface coefficient is-1, is 20.93 from axle amount.Entrance slit 6 is of a size of 2.88mm × 0.024mm.First collimating mirror 7 and the second collimating mirror 8 are that radius-of-curvature is 258.15mm from axle quadric surface, and quadric surface coefficient is 2.390, is respectively 51.47mm and 26.88mm from axle amount.The incisure density in two regions of plane grating 9 is respectively 200g/mm, 365g/mm, and the size in two regions is respectively 19mm × 17mm, 19mm × 17mm.Imaging lens 10 is from axle quadric surface, and radius-of-curvature is 257.427, and quadric surface coefficient is-1.598, is 72.29mm from axle amount.The whole focal length facing limit imaging spectral instrument system is 68.8mm.First passage and second channel share detector image planes 11, detector image planes obtain the digital picture of detector, detector image planes size 13.3mm × 13.3mm.Present embodiment, by reasonably designing the spectral-transmission favtor of the first broad band pass filter 1 and the second broad band pass filter 2, can well suppress the impact of the second order spectrum of plane grating 9 thus reduce parasitic light.
The present invention can realize broadband, the detection of great dynamic range Hyper spectral Imaging, is suitable as the optical system with the broadband great dynamic range imaging spectrometer on aircraft on satellite, the fields such as space flight, aviation atmospheric remote sensing, earth observation.
Claims (7)
1. binary channels light path miniaturization broadband imaging spectrometer optical system altogether, this optical system comprises the first broad band pass filter (1), the second broad band pass filter (2), the first aperture diaphragm (3), the second aperture diaphragm (4), telescope (5), entrance slit (6), the first collimating mirror (7), the second collimating mirror (8), plane grating (9), imaging lens (10) and detector image planes (11), it is characterized in that, the light beam of same target is divided into two passages through the first broad band pass filter (1) and the second broad band pass filter (2) and incides on telescope (5) through the first aperture diaphragm (3) and the second aperture diaphragm (4) respectively, be imaged onto on entrance slit (6) through telescope (5), described light beam is after entrance slit (6) outgoing, incide in the zones of different of plane grating (9) after the first collimating mirror (7) and the second collimating mirror (8) respectively, imaging lens (10) is incident to after plane grating (9) dispersion, through imaging lens imaging (10) on same detector image planes (11).
2. binary channels according to claim 1 light path miniaturization broadband imaging spectrometer optical system altogether, it is characterized in that, the reflecting surface arranged opposite of described telescope (5) and the first collimating mirror (7) and the second collimating mirror (8), the reflecting surface of the first collimating mirror (7) and the first collimating mirror (8) and the diffraction surfaces arranged opposite of plane grating (9), the diffraction surfaces of plane grating (9) and the reflecting surface arranged opposite of imaging lens (10), the reflecting surface of imaging lens (10) and detector image planes (11) arranged opposite.
3. binary channels according to claim 1 light path miniaturization broadband imaging spectrometer optical system altogether, it is characterized in that, described first aperture diaphragm (3) is different with the bore of the second aperture diaphragm (4).
4. binary channels according to claim 1 light path miniaturization broadband imaging spectrometer optical system altogether, it is characterized in that, described telescope (5) is off axis paraboloidal mirror.
5. binary channels according to claim 1 light path miniaturization broadband imaging spectrometer optical system altogether, it is characterized in that, described first collimating mirror (7) and the second collimating mirror (8) are off-axis aspheric mirror.
6. binary channels according to claim 1 light path miniaturization broadband imaging spectrometer optical system altogether, it is characterized in that, described two passages use the zones of different of same plane grating (9).
7. binary channels according to claim 1 light path miniaturization broadband imaging spectrometer optical system altogether, it is characterized in that, described imaging lens (10) is off-axis aspheric mirror.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103292902B (en) * | 2013-05-29 | 2015-04-15 | 南京信息工程大学 | Dayglow temperature photometer and method thereof for detecting airglow spectrum intensity and temperature |
| CN103389159B (en) * | 2013-07-23 | 2015-02-18 | 中国科学院长春光学精密机械与物理研究所 | Prism and grating cascading dispersion two-channel and high-resolution spectrum imaging system |
| CN103592028B (en) * | 2013-10-29 | 2015-09-30 | 中国科学院长春光学精密机械与物理研究所 | Based on the double diffraction Ji Cigong road detection grating spectrograph of double-color detector |
| CN104535184A (en) * | 2014-12-22 | 2015-04-22 | 中国科学院长春光学精密机械与物理研究所 | Light path structure of prism-grating imaging spectrometer |
| CN106895919B (en) * | 2016-12-30 | 2018-08-17 | 中国科学院长春光学精密机械与物理研究所 | A kind of double-channel spectrometer structure of miniaturization four gratings linkage |
| CN110632058B (en) * | 2019-11-04 | 2022-05-03 | 宁波源禄光电有限公司 | Small light splitting device for Raman spectrum analysis |
| CN113804631A (en) * | 2021-08-23 | 2021-12-17 | 中国科学院国家空间科学中心 | Monitoring system for acquisition of spectral information |
| CN114199377B (en) * | 2021-08-23 | 2023-12-05 | 南开大学 | Near infrared nano enhanced spectrometer |
| CN113865705B (en) * | 2021-08-25 | 2023-11-14 | 爱博能(广州)科学技术有限公司 | Dual-channel optical path system with shared optical path and spectrometer |
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