Field stitching-based programmable polarization super spectrum imager

Abstract

The invention relates to a field stitching-based programmable polarization super spectrum imager, which comprises a front lens, a field diaphragm, a collimating lens, an acoustooptic tunable filter, an imaging lens, a detector and a detector control processing system, wherein the front lens, the field diaphragm, the collimating lens and the acoustooptic tunable filter are arranged in the same optical path in turn; an O-light optical path transition system is arranged in an O-light optical path after light in the O-light optical path is diffracted by the acoustooptic tunable filter; an E-lightoptical path transition system is arranged on an E-light optical path after light in the E-light optical path is diffracted by the acoustooptic tunable filter; and O light beams converted by the O-light optical path transition system and E light beams converted by the E-light optical path transition system pass through the imaging lens together, the photosensitive surface of the detector is positioned on the rear focal plane of the imaging lens, and the detector is connected with the detector control processing system. The invention provides a programmable polarization super spectrum imager synthesizing O light images and E light images on the photosensitive surface of the same detector through field stitching.

Description

technical field [0001] The invention relates to a polarization hyperspectral imager, in particular to a programmable polarization hyperspectral imager based on field of view splicing, capable of simultaneously acquiring orthogonal polarization spectrum image information, and capable of multispectral composite imaging. 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. 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 ...

AI Technical Summary

Problems solved by technology

However, the existing technical solutions have the following defects: (1) two detectors are required to obtain the O-ray image and the E-ray image respectively, which undoubtedly complicates the system structure and increases the cost; (2) the image drift caused by AOTF tuning is not compensated, As a result, the signal-to-noise ratio of the restored spectrum deteriorates due to spectral band aliasing; (3) The AOTF drive device uses a DDS chip, which can only work in single-frequency mode, and cannot obtain multi-spectral segment composite images in multi-frequency mode

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