Ultra-large FOV (Field Of View) static polarized Fourier transform imaging spectrometer

Abstract

The invention relates to an ultra-large FOV (Field Of View) static polarized Fourier transform imaging spectrometer comprising a front telescope system, a polarizer, an FOV compensation-type polarized beam splitter, a polarization analyzer, an imaging lens group and a detector which are coaxially and sequentially arranged, wherein the detector is connected with a signal collecting and processing system. The invention introduces two Savart polarizers which respectively have positive and negative interference fringe distortion to form the polarized beam splitter so that the positive interference fringe distortion and the negative interference fringe distortion can mutually counteract so as to enlarge the FOV angle. The invention has the advantages of small size, light weight, simple and compact structure, no motion part, large FOV, great luminous flux, high detection sensitivity, noise-signal ratio and wavelength accuracy and wide spectral detection range.

Description

technical field [0001] The invention relates to the technical field of optical instruments, in particular to a super-large field of view static polarization Fourier transform imaging spectrometer. Background technique [0002] Light is the carrier of information. The imager obtains the spatial information of the target by obtaining the shape and shadow image of the target, while the spectrometer obtains the spectral information of the target to obtain the structure and chemical composition of the material. In the 1980s, the American Aerodynamics Laboratory (JPL) proposed the concept of an imaging spectrometer, which has the dual functions of simultaneously obtaining target images and spectrograms. It is generally considered to be a revolutionary leap in the history of modern optical instrument technology development; Imaging spectrometers with various principles such as dispersion type, Fourier transform type (interference type), filter type, and computed tomography type are...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of low luminous flux due to the small field angle of existing spatially modulated interference imaging spectrometers, the purpose of the present invention is to propose a super-large field of view static polarization Fourier transform imaging spectrometer based on a field-of-view compensation type polarization beam splitter, which has a simple structure It is compact, has no moving parts, and can simultaneously acquire the two-dimensional space image information and one-dimensional interference spectrum information of the target within a large field of view.

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