红外分焦平面偏振探测器的校正实验误差分析  

Error Analysis of Calibration Experiment of Infrared Division-of-Focal-Plane Polarimeters

作　　者：彭漩城 苏禹相 胡铁 王仕川 彭元龙 郑锦坤 杨振宇[1] 赵茗[1] Peng Xuancheng;Su Yuxiang;Hu Tie;Wang Shichuan;Peng Yuanlong;Zheng Jinkun;Yang Zhenyu;Zhao Ming(School of Optical and Electronic Information,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China;State Grid Information&Telecommunication Branch,Beijing 100761,China;State Grid Jiangxi Electric Power Co.,Ltd.,Nanchang 330096,Jiangci,China)

机构地区：[1]华中科技大学光学与电子信息学院,湖北武汉430074 [2]国家电网有限公司信息通信分公司,北京100761 [3]国网江西省电力有限公司,江西南昌330096

出　　处：《光学学报》2024年第14期38-46,共9页Acta Optica Sinica

基　　金：国家电网公司科技项目(5700-202325308A-1-1-ZN)。

摘　　要：红外分焦平面偏振探测器存在严重的非均匀性问题,导致获得的偏振信息准确度降低,通过校正实验能够有效消除非均匀性带来的影响。在实现红外分焦平面偏振探测器校正的基础上,分析实验装置中定标光源的非均匀性和辐射强度等因素对最终校正效果引入的误差干扰,验证了使用均匀光源的必要性以及光源强度对实验装置抗噪声能力的影响,为实现探测器的精确校正提供了装置选取的参考准则。进一步开展了探测器校正后的成像实验,结果表明,目标的偏振特征信息恢复效果明显。Objective Infrared polarization detection can simultaneously acquire the intensity, polarization, and other multidimensional feature information of the target. It compensates for the weakness of traditional infrared imaging, which struggles to detect targets in situations with infrared camouflage interference. Recently, infrared polarization detection has been widely used in civil and military fields such as biomedicine, target recognition, face enhancement, and remote sensing. Infrared division-of-focal-plane polarimeters are the mainstream polarization detectors, belonging to simultaneous polarization detection systems. They can acquire information on various polarization directions in a single imaging by using an array of micro-polarizers attached in front of the focal plane. However, due to the materials of the detectors and fabrication technology, infrared division-of-focal-plane polarimeters suffer from a serious non-uniformity problem during the imaging process, resulting in poor accuracy of the detected polarization information. To eliminate the effects of this nonuniformity problem, the detectors need to be calibrated before use to ensure accurate acquisition of polarization information. Therefore, this paper proposes selection criteria for the experimental equipment used in the non-uniformity calibration of infrared division-of-focal-plane polarimeters to improve the accuracy of calibration.Methods We calibrate the infrared division-of-focal-plane polarimeters based on the structural characteristics and imaging principles, to minimize the interference caused by the non-uniformity of the micro-polarizer array on the accuracy of polarization information detection. The calibration process involves exposing the polarimeters to incident radiation with known polarization states to reconstruct the real instrumentation matrix of each super-pixel. During the calibration experiments, we also investigate the impact of the light source's uniformity and radiation intensity on the calibration effect.We use a laser wi

关 键 词：红外偏振 分焦平面探测器 非均匀性校正 误差分析 

分 类 号：O436.3[机械工程—光学工程]