光学学报, 2020, 40 (3): 0326001, 网络出版: 2020-02-10
基于偏振相机的全斯托克斯偏振仪优化研究 下载: 1378次
Optimization of Polarization-Camera-Based Full Stokes Polarimeter
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 physical optics polarization polarimeter division-of-focal-plane camera full Stokes vector self-calibration
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。
Abstract
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.
黎海育, 李抄, 李校博, 王辉, 胡浩丰, 刘铁根. 基于偏振相机的全斯托克斯偏振仪优化研究[J]. 光学学报, 2020, 40(3): 0326001. Haiyu Li, Chao Li, Xiaobo Li, Hui Wang, Haofeng Hu, Tiegen Liu. Optimization of Polarization-Camera-Based Full Stokes Polarimeter[J]. Acta Optica Sinica, 2020, 40(3): 0326001.