Fourier Transform Infrared Imaging Spectrometer Based on Multistage Micromirrors

Abstract

The invention discloses a Fourier transform infrared imaging spectrometer based on a multistage micro-reflector and relates to the field of earth remote sensing detection. The Fourier transform infrared imaging spectrometer solves the problem that a slit related to the spatial resolution is contained in an existing imaging spectrometer, and the luminous flux entering a system is limited. The Fourier transform infrared imaging spectrometer comprises a front imaging system, an interference system, a rear imaging system and a focal plane detector. The inference system comprises a multistage step micro-reflector piece-shaped beam splitter, a compensating plate and a plane reflector. After light emitted by a target passes through the front imaging system and the piece-shaped beam splitter, one beam is reflected to the plane reflector through the piece-shaped beam splitter to be imaged to be a first image point, and the other beam is transmitted through the piece-shaped beam splitter and then passes through the compensating plate to be imaged on a certain step reflecting face of the multistage step micro-reflector to be a second image point. Light of the first image point is transmitted through the piece-shaped beam splitter to reach the rear imaging system to be imaged, and light of the second image point passes through the compensating plate, is reflected by the piece-shaped beam splitter and is then imaged on a rear imaging beam contracting system, and an image of the rear imagining beam contracting system is received by the focal plane detector.

Description

technical field [0001] The invention relates to the field of earth remote sensing detection, relates to a Fourier transform imaging spectrometer system, in particular to a novel space-time joint modulation Fourier transform infrared spectrometer system based on an integrated stepped micro-mirror and a sheet beam splitter. Background technique [0002] Imaging spectrometer is an organic combination of spectrometer and imager. It can obtain spectral information and image information of target objects, which solves the problems of traditional spectrometer with spectrum but no image and traditional multispectral imager with image but without spectrum. Therefore, it is widely used in space remote sensing, military target detection, geological resource exploration, environmental monitoring, meteorological analysis and other fields. According to different working principles, it is mainly divided into two types: dispersion type and Fourier transform type. The dispersive imaging spe...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the existing imaging spectrometer contains slits related to spatial resolution, which limits the luminous flux entering the system, and generally has shortcomings such as uncompact structure and relatively heavy weight, the present invention provides a multi-level stepped micro-reflection Mirrored Fourier Transform Infrared Imaging Spectrometer

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