基于偏振相机的全斯托克斯偏振仪优化研究  

Optimization of Polarization-Camera-Based Full Stokes Polarimeter

作　　者：黎海育 李抄 李校博 王辉[3] 胡浩丰 刘铁根[1] Li Haiyu;Li Chao;Li Xiaobo;Wang Hui;Hu Haofeng;Liu Tiegen(Key Laboratory of Opto-electronics Information Technology,Ministry of Education,School of Precision Instrument&Opto-electronics Engineering,Tianjin University,Tianjin 300072,China;Institute of Medical Support Technology,Institute of System Engineering,Academy of Military Sciences,Tianjin 300160,China;College of Physics Science and Information Engineering,Hebei Normal University,Shijiazhuang,Hebei 050024,China)

机构地区：[1]天津大学精密仪器与光电子工程学院光电信息技术教育部重点实验室,天津300072 [2]军事科学院系统工程研究院卫勤保障技术研究所,天津300160 [3]河北师范大学物理科学与信息工程学院,河北石家庄050024

出　　处：《光学学报》2020年第3期161-168,共8页Acta Optica Sinica

基　　金：国家自然科学基金(61775163);中国科协青年人才托举工程项目(2017QNRC001)。

摘　　要：通过在分焦平面(DoFP)偏振相机前置相位延迟器,可将线偏振斯托克斯矢量的测量拓展为全斯托克斯矢量(FSV)的测量。针对基于DoFP相机的FSV偏振仪,提出了两种分别利用矩阵分解和伪逆模型估算FSV的优化策略。针对不同的FSV估算模型,这两种优化策略在两次光强采集的条件下可最小化测算方差,从而实现了测量精度的最优化。特别地,利用DoFP相机固有的测量冗余特性,提出了基于两次光强采集的波片相位延迟量自标定解析解,该自标定算法可在实际应用中替代波片相位延迟量标定环节,同时为动态变化环境下的实时偏振测量提供技术支撑。The measurement of linearly-polarized Stokes vector can be extended to the measurement of full Stokes vector(FSV) by placing a phase retarder, such as a waveplate, in front of the division-of-focal-plane(DoFP) polarization camera. In this study, we propose two optimization strategies to estimate FSV by matrix-decomposition and pseudo-inverse models for DoFP-camera-based FSV polarimeters. According to different FSV estimation models, these two strategies can minimize the measurement variance under the condition of two light-intensity acquisition, thereby optimizing the measurement precision. In particular, by using the inherent measurement redundancy of the DoFP camera, we also propose a self-calibrated analytical solution of the phase retardance of waveplate. This self-calibrated algorithm can replace the step of separate calibration of the phase retardance of waveplate in practical application and can provide technical support for real-time polarization measurement in dynamic environments.

关 键 词：物理光学 偏振 偏振仪 分焦平面相机 全斯托克斯矢量 自标定 

分 类 号：O438[机械工程—光学工程]