Online calibration system and calibration method of infrared spectroscopy polarization imager

Abstract

The invention discloses an online calibration system of an infrared spectroscopy polarization imager. Based on a telephoto lens, a to-be-calibrated infrared spectroscopy polarization imager is constituted by a polarization modulation system, a spectrum splitting system and an imaging detection system. The imaging detection system includes a surface source black body, a grating monochromator, a collimating system, a fixed polarizing film, and a rotary achromatic waveplate which is installed on a hollow servo motor which are successfully arranged in the light path. The telephoto lens, the polarization modulation system, the spectrum splitting system and an imaging detection system are successfully disposed behind the achromatic waveplate. The invention also discloses a calibration method, based on the characteristics of the infrared spectroscopy polarization imager, and separately provides a spectrum calibration method based on gaussian function fitting process and a polarization calibration method which is based on multi-point resolution method of subsidiary polarization calibration samples so as to in situ online calibration and simultaneous calibration of high precision spectrum and polarization of an infrared spectroscopy polarization imaging system.

Description

technical field [0001] The invention relates to the technical field of infrared spectrum polarization imaging, in particular to an online calibration system for an infrared spectrum polarization imager and a calibration method thereof. Background technique [0002] The red light spectral polarization imaging system can obtain target seven-dimensional information (spectrum, light intensity, space, polarization degree, polarization angle, polarization ellipticity and rotation direction) during measurement, and has incomparable advantages over intensity information. It is comprehensive and in-depth It provides an effective way to study the polarization spectrum characteristics of the target. [0003] Through the analysis of the target's polarization spectral characteristics, information such as the chemical composition and properties of the target can be accurately and effectively obtained, which can be used in applied research in various fields. However, how to accurately and...

AI Technical Summary

Problems solved by technology

[0005] At present, the spectral calibration and polarization calibration of the infrared spectral polarization imager often use two optical path systems to calibrate independently, which brings redundant calibration errors. At the same time, the separate calibration structure cannot meet the requirements of the infrared spectral polarization imaging system. The need for in situ online calibration

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