Programmable polarization hyperspectral imager based on aperture segmentation and acoustic-optic tunable filter

Abstract

The invention provides a programmable polarization hyperspectral imager based on aperture segmentation and an acoustic-optic tunable filter, which mainly solves the technical problem that the time division polarization hyperspectral imager is only applicable to static scenes and has the advantages of small and compact structure, easy tuning and the like. The programmable polarization hyperspectral imager comprises a front lens, a field diaphragm, a front collimator, a four-aperture polarizer, a sub-aperture imaging lens, a rear collimator, an AOTF, an imaging lens, a detector, an optical trapand the like, and can obtain all linear polarization information through aperture segmentation. The acousto-optic tunable filter (AOTF) is used as an analyzer and a light-slitting and color-dispersing component, four linear polarization narrow-band spectral images which have different polarization directions and are spliced together are ultimately formed on the detector, and the information on all the linear polarization images within the whole spectral coverage can be obtained through tuning the drive frequency of the AOTF.

Description

technical field [0001] The invention relates to a polarization hyperspectral imager, in particular to a programmable polarization hyperspectral imager capable of simultaneously acquiring all linear polarization spectrum image information. Background technique [0002] Spectral image information can be used to obtain target material composition, content and other chemical characteristics and spatial distribution information. Therefore, imaging spectroscopy technology has broad application prospects in various fields of national economy and society. [0003] First of all, the imaging spectrometer can be used as the payload of the spacecraft, and the spectral information obtained by using it can be applied to the following fields: land resource survey (mineral exploration, urban planning, suburban land classification and utilization, land desertification control and soil erosion monitoring, etc.), forestry (forestry resource survey and forest logging and afforestation monitorin...

AI Technical Summary

Problems solved by technology

[0014] The present invention provides a small and compact spectral imager based on aperture segmentation and AOTF, which can simultaneously acquire all the linear polarization spectral image information of the target scene, so as to solve the problem that the time-division AOTF polarization hyperspectral imaging spectrometer in the prior art is only applicable to static scenes question

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