Calibration and non-uniformity correction of near-infrared polarization detector
投稿时间:2019-05-21  修订日期:2019-12-30  download
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尹佳琪 中国科学院上海技术物理研究所上海 200083
中国科学院大学北京 10049
中国科学院红外探测与成像技术重点实验室上海 200083 
yinjiaqi@mail.ustc.edu.cn 
王世勇 中国科学院上海技术物理研究所上海 200083
中国科学院红外探测与成像技术重点实验室上海 200083 
 
张瑞 中国科学院上海技术物理研究所上海 200083
中国科学院大学北京 10049
中国科学院红外探测与成像技术重点实验室上海 200083 
 
李范鸣 中国科学院上海技术物理研究所上海 200083
中国科学院红外探测与成像技术重点实验室上海 200083 
lfmjws@163.com 
Abstract:Near-infrared polarization detector integrates micro-polarizer array on the surface of focal plane detector, which not only has the non-uniformity of detector response, but also has the non-uniformity of transmittance and extinction ratio of micro-polarizer array and angle error of micro-polarizer, which seriously affects the accuracy of polarization detection and the uniformity of polarization image. The structure of the polarization detector is introduced firstly, the signal response model of the detector is established. Based on the signal response model, the corresponding parameter calibration scheme is made. High-precision calculation of polarization states of incident radiation and non-uniformity correction of polarization image are realized. The experimental data show that the calculated linear polarization is 97.8% ~ 101.5% of the true value after calibration, which meets the accuracy requirements of polarization detection. The non-uniformity of intensity image and linear polarization image has been reduced by 93.64% and 93.67% respectively compared with the uncorrected image, and the image quality has been effectively improved.
keywords:Near infrared  Polarization detector  Polarization calibration  Non-uniformity Correction
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Copyright:《Journal of Infrared And Millimeter Waves》