CN103017900A - Dual-channel common-path prism dispersion broadband imaging spectrometer optical system - Google Patents
Dual-channel common-path prism dispersion broadband imaging spectrometer optical system Download PDFInfo
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- CN103017900A CN103017900A CN2012104879254A CN201210487925A CN103017900A CN 103017900 A CN103017900 A CN 103017900A CN 2012104879254 A CN2012104879254 A CN 2012104879254A CN 201210487925 A CN201210487925 A CN 201210487925A CN 103017900 A CN103017900 A CN 103017900A
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Abstract
The invention discloses a dual-channel common-path prism dispersion broadband imaging spectrometer optical system, and relates to the technical field of space optics, aiming at solving the problems of complex structure, large volume and heavy weight of the existing broadband imaging spectrometer optical system. The dual-channel common-path prism dispersion broadband imaging spectrometer optical system comprises a first aperture diaphragm, a second aperture diaphragm, a telescope, an entrance slit, a first collimating mirror, a second collimating mirror, a dispersion prism, a first imaging mirror, a second imaging mirror and a detector image plane; light beams emitted by a same objective, passing through the first aperture diaphragm and the second aperture diaphragm, are respectively reflected onto the telescope through a first channel and a second channel, imaged on the entrance slit through the telescope, reflected onto the dispersion prism through the first collimating mirror and the second collimating mirror, dispersed by the dispersion prism, and are imaged on the detector image plane through the first imaging mirror and the second imaging mirror. The optical system disclosed by the invention is applicable to aeronautic and astronautic atmospheric remote sensing, earth observation and other fields.
Description
Technical field
The present invention relates to the space optics technical field, be specifically related to a kind of reflective prism dispersion molded breadth wave band imaging spectrometer optical system in the space optics.
Background technology
Imaging spectrometer is a kind of new spatial remote optical sensing instrument that grows up on the multispectral romote sensing technology basis, it can obtain with high spectral resolution the super multispectral image of target, on land, the field such as atmosphere and ocean remote sensing obtaining using more and more widely.In recent years, the development of using along with space remote sensing is also more and more higher to the requirement of the wavelength band of imaging spectrometer and dynamic range.Wavelength band has expanded to ultraviolet band from common visible waveband, and wave band is wider, and the spectral information of the target that comprises is just abundanter, realize that ultraviolet to visible broadband signal surveys simultaneously.Face the fields such as limit remote sensing at the broadband atmosphere that comprises ultraviolet band, the signal of ultraviolet band and the signal strength differences of visible waveband have reached 10
5～10
6Magnitude.For realization is surveyed 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 a plurality of 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 altogether light path prism dispersion broadband imaging spectrometer optical system of a kind of binary channels.
Binary channels is light path prism dispersion broadband imaging spectrometer optical system altogether, and this optical system comprises the first aperture diaphragm, the second aperture diaphragm, telescope, entrance slit, the first collimating mirror, the second collimating mirror, dispersing prism, the first imaging lens, the second imaging lens and detector image planes; The light beam of same target outgoing incides on the telescope by first passage and second channel respectively through the first aperture diaphragm and the second aperture diaphragm, light beam is after telescope is imaged onto entrance slit, behind the first collimating mirror and the second collimating mirror, incide on the dispersing prism respectively, after the dispersing prism dispersion, be imaged on the detector image planes through the first imaging lens and the second imaging lens again.
Principle of work of the present invention: the present invention be the target of broadband great dynamic range can blur-free imaging on the detector image planes of miniaturization imaging spectrometer, adopted the altogether system architecture of light path prism dispersion of binary channels, being divided into two passages surveys, the wave band of two passages is identical, and 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, dispersing prism, the first imaging lens, the second imaging lens and detector image planes.Optical system of the present invention is pressed xyz right hand space coordinates ordered arrangement, and the z direction of principal axis is decided to be optical axis direction, and the x axle is perpendicular to the yz plane, and entrance slit has certain angle with the y axle in the yz plane.
Beneficial effect of the present invention: optical system of the present invention can realize comprising the broadband great dynamic range imaging spectral detection of ultraviolet band, and the dynamic range of detectable signal reaches 10
5～10
6, binary channels is light path altogether, and system layout is compact, possesses miniaturization, light-weighted characteristics, and the prism dispersion has the high characteristics of spectral transmissions efficient.
Description of drawings
Fig. 1 is the altogether structural diagrams intention of light path prism dispersion broadband imaging spectrometer optical system of binary channels of the present invention;
Fig. 2 is the vertical view that binary channels of the present invention is total to dispersing prism in the light path prism dispersion broadband imaging spectrometer optical system;
Among the figure, the 1, first aperture diaphragm, the 2, second aperture diaphragm, 3, first passage, 4, second channel, 5, telescope, 6, entrance slit, the 7, first collimating mirror, the 8, second collimating mirror, 9, dispersing prism, the 10, first imaging lens, the 11, second imaging lens, 12, detector image planes, a, the plane of incidence, b, exit facet, c, bottom surface.
Embodiment
Embodiment one, in conjunction with Fig. 1 and Fig. 2 present embodiment is described, binary channels is light path prism dispersion broadband imaging spectrometer optical system altogether, and this optical system comprises the first aperture diaphragm 1, the second aperture diaphragm 2, telescope 5, entrance slit 6, the first collimating mirror 7, the second collimating mirror 8, dispersing prism 9, the first imaging lens 10, the second imaging lens 11 and detector image planes 12; The light beam of same target outgoing is through the first aperture diaphragm 1 and the second aperture diaphragm 2 is divided into first passage 3 and second channel 4 incides respectively on the same telescope 5, be imaged onto on the entrance slit 6 through telescope 5, after entrance slit 6 outgoing, behind the first collimating mirror 7 and the second collimating mirror 8, incide on the dispersing prism 9 respectively, after dispersing prism 9 dispersions, be incident to the first imaging lens 10, after 10 reflections of the first imaging lens, be incident to the second imaging lens 11, be imaged on the same detector image planes 12 through the second imaging lens 11.
The relative arrangement of reflecting surface of the described telescope 5 of present embodiment and the first collimating mirror 7 and the second collimating mirror 8,9 relative arrangement of plane of incidence a of the reflecting surface of the first collimating mirror 7 and the first collimating mirror 8 and dispersing prism, the relative arrangement of reflecting surface of the exit facet b of dispersing prism 9 and the first imaging lens 10, the relative arrangement of reflecting surface of the reflecting surface of the first imaging lens 10 and the second imaging lens 11, the reflecting surface of the second imaging lens 11 and the 12 relative arrangements of detector image planes.
The described telescope 5 of present embodiment, the first collimating mirror 7, the second collimating mirror 8 are off-axis parabolic mirror, the first imaging lens 10 is spherical reflector, the second imaging lens 11 is from axle oblate ellipsoid catoptron, the material of described dispersing prism 9 is fused quartz, in conjunction with Fig. 2, the plane of incidence a of dispersing prism 9 and the angle of exit facet b are apex angle α, and the face relative with drift angle is bottom surface c.
Embodiment two, present embodiment are the altogether application of light path prism dispersion broadband imaging spectrometer optical system of embodiment one described binary channels, present embodiment is surveyed the atmospheric ozone profile to face the limit observed pattern, orbit altitude H=833km, instrument is 3365km to the distance of facing the limit observation station, spectral resolution is 1.5nm～40nm, and spatial resolution is 3km.Imaging spectrometer optical system focal length 69mm, 2.3 ° * 0.034 ° of visual field, service band 280～1000nm.Atmosphere faces the limit scene through the first aperture diaphragm 1 and the second aperture diaphragm 2 is divided into first passage 3 and second channel 4 incides on the same telescope 5.The bore of the first aperture diaphragm 1 is 6mm, and the bore of the second aperture diaphragm 2 is 10mm, and heavy caliber is used for weak signal to be surveyed, small-bore for strong acquisition of signal, and two passages adopt different optics bores, thereby have enlarged the dynamic range of instrument.Telescope 5 is off axis paraboloidal mirror, and radius-of-curvature is 180mm, and the quadric surface coefficient is-1, is 25mm from the axle amount.Entrance slit 6 is of a size of 3.61mm * 0.054mm.The first collimating mirror 7 and the second collimating mirror 8 are off axis paraboloidal mirror, and radius-of-curvature is 180mm, and the quadric surface coefficient is-1, is respectively 35mm, 18mm from the axle amount.The material of dispersing prism 9 is fused quartz, and apex angle α is 64 °.The first imaging lens 10 is spherical mirror, and radius-of-curvature is 161.1mm.The second imaging lens 11 is from axle oblate ellipsoid mirror, and radius-of-curvature is 159.2mm, and the quadric surface coefficient is 0.172, is 50mm from the axle amount.First passage 3 and second channel 4 shares detector image planes 12, obtains the digital picture of detector, detector image planes 12 size 13.3mm * 13.3mm in detector image planes 12.
The present invention can realize broadband, the detection of great dynamic range Hyper spectral Imaging, is suitable as the optical system of spaceborne and airborne broadband great dynamic range imaging spectrometer, and application comprises the fields such as space flight, aviation atmospheric remote sensing, earth observation.
Claims (7)
1. binary channels is total to light path prism dispersion broadband imaging spectrometer optical system, and this optical system comprises the first aperture diaphragm (1), the second aperture diaphragm (2), telescope (5), entrance slit (6), the first collimating mirror (7), the second collimating mirror (8), dispersing prism (9), the first imaging lens (10), the second imaging lens (11) and detector image planes (12); It is characterized in that, the light beam of same target outgoing incides on the telescope (5) by first passage (3) and second channel (4) respectively through the first aperture diaphragm (1) and the second aperture diaphragm (2), light beam is after telescope (5) is imaged onto entrance slit (6), behind the first collimating mirror (7) and the second collimating mirror (8), incide on the dispersing prism (9) respectively, after dispersing prism (9) dispersion, be imaged on the detector image planes (12) through the first imaging lens (10) and the second imaging lens (11) again.
2. binary channels according to claim 1 is total to light path prism dispersion broadband imaging spectrometer optical system, it is characterized in that, described telescope (5) and the first collimating mirror (7), the reflecting surface of the second collimating mirror (8) is arranged relatively, the relative arrangement of the plane of incidence (a) of the reflecting surface of described the first collimating mirror (7) and the second collimating mirror (8) and dispersing prism (9), the exit facet (b) of dispersing prism (9) and relative arrangement of reflecting surface of the first imaging lens (10), the relative arrangement of reflecting surface of the reflecting surface of the first imaging lens (10) and the second imaging lens (11), the relative arrangement with detector image planes (12) of the reflecting surface of the second imaging lens (11).
3. binary channels according to claim 1 is total to light path prism dispersion broadband imaging spectrometer optical system, it is characterized in that described telescope (5) is off axis paraboloidal mirror.
4. binary channels according to claim 1 is total to light path prism dispersion broadband imaging spectrometer optical system, it is characterized in that described the first collimating mirror (7) and the first collimating mirror (8) are off axis paraboloidal mirror.
5. binary channels according to claim 1 is total to light path prism dispersion broadband imaging spectrometer optical system, it is characterized in that the material of described dispersing prism (9) is fused quartz.
6. binary channels according to claim 1 is total to light path prism dispersion broadband imaging spectrometer optical system, it is characterized in that described the first imaging lens (10) is spherical reflector, and the second imaging lens (11) is from axle oblate ellipsoid catoptron.
7. binary channels according to claim 1 is total to light path prism dispersion broadband imaging spectrometer optical system, it is characterized in that the bore of described the first aperture diaphragm (1) is different from the bore of the second aperture diaphragm (2).
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Cited By (8)
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| CN103984038A (en) * | 2014-05-15 | 2014-08-13 | 中国科学院长春光学精密机械与物理研究所 | Satellite-borne scanning-type atmosphere limb chromatography detection system |
| RU2531024C1 (en) * | 2013-06-03 | 2014-10-20 | Открытое акционерное общество "Российская корпорация ракетно-космического приборостроения и информационных систем" (ОАО "Российские космические системы") | Method of remote earth probing (reb) |
| CN108387315A (en) * | 2018-05-08 | 2018-08-10 | 中国工程物理研究院激光聚变研究中心 | More slit grating spectrometers |
| CN108760634A (en) * | 2018-05-31 | 2018-11-06 | 中国科学院合肥物质科学研究院 | A kind of ultraviolet-visible-near infrared imaging spectrometer for the detection of airborne water colour |
| CN110132414A (en) * | 2019-05-20 | 2019-08-16 | 哈尔滨理工大学 | Binary channels broadband lens type continuous spectroscopic measurement instrument and its measurement method |
| CN112432707A (en) * | 2020-09-30 | 2021-03-02 | 天津大学 | Polarization aperture-division and multispectral imaging device for infrared band |
| 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 |
| CN115166957A (en) * | 2022-06-17 | 2022-10-11 | 苏州大学 | Dual-band spectral imaging method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2531024C1 (en) * | 2013-06-03 | 2014-10-20 | Открытое акционерное общество "Российская корпорация ракетно-космического приборостроения и информационных систем" (ОАО "Российские космические системы") | Method of remote earth probing (reb) |
| CN103984038A (en) * | 2014-05-15 | 2014-08-13 | 中国科学院长春光学精密机械与物理研究所 | Satellite-borne scanning-type atmosphere limb chromatography detection system |
| CN103984038B (en) * | 2014-05-15 | 2017-01-11 | 中国科学院长春光学精密机械与物理研究所 | Satellite-borne scanning-type atmosphere limb chromatography detection system |
| CN108387315A (en) * | 2018-05-08 | 2018-08-10 | 中国工程物理研究院激光聚变研究中心 | More slit grating spectrometers |
| CN108760634A (en) * | 2018-05-31 | 2018-11-06 | 中国科学院合肥物质科学研究院 | A kind of ultraviolet-visible-near infrared imaging spectrometer for the detection of airborne water colour |
| CN110132414A (en) * | 2019-05-20 | 2019-08-16 | 哈尔滨理工大学 | Binary channels broadband lens type continuous spectroscopic measurement instrument and its measurement method |
| CN110132414B (en) * | 2019-05-20 | 2022-01-21 | 哈尔滨理工大学 | Double-channel broadband prism type continuous spectrum measuring instrument and measuring method thereof |
| CN112432707A (en) * | 2020-09-30 | 2021-03-02 | 天津大学 | Polarization aperture-division and multispectral imaging device for infrared band |
| 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 |
| CN115166957A (en) * | 2022-06-17 | 2022-10-11 | 苏州大学 | Dual-band spectral imaging method |
| CN115166957B (en) * | 2022-06-17 | 2023-05-02 | 苏州大学 | Dual-band spectrum imaging method |
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Application publication date: 20130403 |