Space-time co-modulated Fourier transform imaging spectrometer based on light beam splitter

Abstract

The invention discloses a spatial-temporal union modulation Fourier transform imaging spectrometer based on a light beam splitter and relates to the field of earth observation imaging spectrometers. In order to solve the problems that an interference beam splitting system in an existing imaging spectrometer is large in size, the light weight of the system cannot be conveniently achieved, a slit related to the spatial resolution is contained in the system, and the luminous flux entering the system is limited, a grid type beam splitter system is introduced in to replace a beam splitter and a compensation board in the system, and the advantages of the small size and the light weight are achieved. The light weight of the system is achieved, meanwhile, convenience is brought to design of a whole optical system, the system does not contain a slit, compared with a spatial modulation Fourier transform imaging spectrometer, the luminous flux of the system is greatly improved, the slit in the spatial modulation Fourier transform imaging spectrometer is removed, the high spectral resolution is achieved, and meanwhile the signal to noise ratio of the system is effectively improved. The spatial-temporal union modulation Fourier transform imaging spectrometer is based on a Michelson interferometer structure, and the reliability of the system is greatly improved.

Description

technical field [0001] The invention relates to the field of imaging spectrometers for earth observation, in particular to a novel space-time joint modulation infrared Fourier transform imaging spectrometer system, in particular to a novel space-time joint modulation Fourier transform infrared imaging spectrometer based on a grid-type beam splitter Background technique [0002] Imaging spectrometer is a powerful tool for deep space remote sensing detection, object analysis and recognition, and geological resource exploration. It is a new generation of optical remote sensing instrument developed on the basis of multispectral imager, which combines the characteristics of multispectral imager and spectrometer. It can realize the integrated detection of target objects, so 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 princip...

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Problems solved by technology

[0003] In order to solve the problem that the interference spectroscopic system inside the existing imaging spectrometer is relatively large, it is not convenient to realize the lightweight of the system, and there are slits related to the spatial resolution inside, which limits the luminous flux entering the system. Space-time co-modulated Fourier transform imaging spectrometer with lightweight beam splitter

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