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Prism and grating cascading dispersion two-channel and high-resolution spectrum imaging system

A high-resolution spectrum and imaging system technology, applied in the field of prism and grating cascade dispersion dual-channel high-resolution spectral imaging system, can solve the problem that high-resolution and wide-band spectrum cannot be detected at the same time, and achieve volume reduction , Suppress stray light, improve the effect of spectral resolution

Inactive Publication Date: 2013-11-13
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that existing spectral imaging systems using single dispersion cannot realize simultaneous detection of high-resolution and wide-band spectra, the present invention provides a cascaded prism and grating dispersion dual-channel high-resolution spectral imaging system

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  • Prism and grating cascading dispersion two-channel and high-resolution spectrum imaging system
  • Prism and grating cascading dispersion two-channel and high-resolution spectrum imaging system

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specific Embodiment approach 1

[0027] Specific implementation mode one, such as figure 1 As shown, the prism and grating cascade dispersion dual-channel high-resolution spectral imaging system of the present invention mainly consists of an incident slit 1, a first collimating mirror 2, a dispersion prism 3, a focusing mirror 4, a color separation film 5, and a plane Folding mirror 6, first deflection prism 7, second collimating mirror 8, first plane grating 9, first focusing lens group 10, first detector focal plane 11, second deflection prism 12, third collimator It consists of a straight mirror 13, a second plane grating 14, a second focusing lens group 15 and a second detector focal plane 16.

[0028] Such as figure 2 As shown, the dispersion prism 3 in this embodiment includes an incident surface a, an exit surface b, and an apex angle α, and the apex angle α of the dispersion prism 3 satisfies: 33°≤α≤37°, the prism and grating cascade dispersion of the present invention The aperture stop of the dual...

specific Embodiment approach 2

[0042] Specific embodiment 2. This embodiment is the application of the prism and grating cascaded dispersion dual-channel high-resolution spectral imaging system described in specific embodiment 1. The spectral imaging system of the present invention is combined with an off-axis parabolic telescopic imaging system. in NO 2 , SO 2 detection of atmospheric composition.

[0043] The wide-band atmospheric scattering beam is imaged on the incident slit 1 of the spectral imaging system of the present invention through an off-axis parabolic telescopic imaging system, and the wide-band light beam is then emitted from the incident slit 1, and the size of the incident slit 1 is 7.5mm×0.19 mm, the focal length of the first collimating mirror 2 is 240mm, the material of the dispersion prism 3 is fused silica, the apex angle α is 35°, the focal length of the focusing mirror 4 is 150mm, the wavelength range of channel one is 250-510nm, and the channel two The wavelength band range is 500...

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Abstract

The invention discloses a prism and grating cascading dispersion two-channel and high-resolution spectrum imaging system, belongs to the field of aerospace optics, and solves the problem that the high resolution and the broadband spectrum of a conventional single dispersion spectrum imaging system cannot be detected simultaneously. A broadband light beam going out of an entrance slit of the system is sequentially subjected to collimation by a first collimating mirror and pre-dispersion by a dispersion prism and is focused to a color separation film by a focusing reflecting mirror in a wavelength dividing manner; the color separation film performs transmission on a light beam c with a short wavelength and reflects a light beam d with a long wavelength; the transmission light beam is imaged on a focal plane of a first detector by a first focusing lens group in a wavelength dividing manner after sequentially subjected to folding by a plane turning mirror and a first turning prism, collimation by a second collimating mirror and secondary dispersion of a first plane grating; and the reflection light beam is imaged on a focal plane of a second detector by a second focusing lens group in a wavelength dividing manner after sequentially subjected to folding by a second turning prism, collimation by a third collimating mirror and secondary dispersion of a second plane grating. According to the prism and grating cascading dispersion two-channel and high-resolution spectrum imaging system, the broadband and high spectral resolution are simultaneously detected, the spectral resolution is improved.

Description

technical field [0001] The invention relates to the technical field of aerospace optics, in particular to a prism and grating cascaded dispersion dual-channel high-resolution spectral imaging system. Background technique [0002] Space remote sensing imaging spectrometer is a new type of space optical remote sensing instrument, which has been successfully applied in land and ocean observation and is favored by scientists. The optical system of the aerospace remote sensing imaging spectrometer is composed of two parts: the telescopic imaging system and the spectral imaging system, which are organically connected together through the incident slit. On the incident slit, the spectral imaging system disperses the incident slit and images it on the focal plane of the detector by wavelength. The spectral imaging system is the core of the aerospace remote sensing imaging spectrometer. The spectral resolution of the aerospace remote sensing imaging spectrometer is completely determi...

Claims

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Application Information

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IPC IPC(8): G01J3/28G01J3/02G02B17/08
Inventor 薛庆生王淑荣
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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