Full polarization spectral imaging system for synchronous detection of ground object light and sky light

Abstract

A full polarization spectrum imaging system for synchronously detecting ground feature light and skylight is formed by an optical system, an electronic driver, a dual-channel image collecting card and a computer; the optical system is divided into two channels: the first channel is formed by a fisheye optical lens, a light filtering wheel 1, two liquid crystal phase variable retarders LCVR1 and LCVR2, a polarization piece 1, a microspur optical lens 1 and a CCD (charge-coupled device) 1 and is used for finishing the imaging of skylight; the second channel is formed by a telescopic optical lens, a light filtering wheel 2, two liquid crystal phase variable retarders LCVR3 and LCVR4, a polarization piece 2, a microspur optical lens 2 and a CCD 2 and is used for finishing the imaging of ground feature light. The electronic driver is used for controlling the voltage values applied to the four LCVRs, changing the phase retardance of the value values, and realizing the dual-channel full polarization imaging. Image signals of the tested skylight and ground feature light are collected by the computer and are subjected to image processing. The system realizes the synchronous detection on polarization information of the skylight and the ground feature light and can be used for the research on remote sensing atmosphere effect correction of ground feature polarization.

Description

technical field [0001] The invention relates to a full polarization spectrum imaging system for synchronous detection of ground object light and sky light, and refers to an optical system for synchronous full polarization spectrum imaging detection of sky and ground near the ground in the field of polarization remote sensing. Background technique [0002] When the reflected light of ground objects is used for polarization imaging remote sensing detection, the changing sky light will affect the polarization detection accuracy and quantification level of ground objects. Because, for most surface objects, the polarization characteristics of the reflected light will change with the change of the polarization state of the incident light. When using the reflected light of the surface object for polarization imaging, the polarization characteristics of the surface object include the polarization of the sky light Therefore, the changing sky light is one of the important factors affe...

AI Technical Summary

Problems solved by technology

[0005] It can be seen from the development situation at home and abroad that the current polarization imaging detection system has not yet realized the simultaneous detection of sky light and ground object reflection light, but only detects the two separately, which makes the change of sky conditions in different measurement times. The measurement results are affected, and the detection accuracy is not high

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