Li Qiwei, Lu Fang, Wang Xiaobin, Zhu Changjiang
Opt Express. 2019 Apr 15;27(8):11734-11747. doi: 10.1364/OE.27.011734.
A polarization-difference channeled imaging spectropolarimeter (PDCISP) using double-Wollaston prism is presented. It enables simultaneous acquisition of a set of three-channel interferograms corresponding to orthogonal polarization modulation. This brings a large range expanding of optical path difference for useful channels, and the major limitation of channeled spectropolarimetry (CSP), namely the channel crosstalk, can be greatly suppressed by using interferogram difference processing. As a result, full resolution intensity spectrum, as well as high-resolution polarimetric signatures, can be obtained with fewer reconstruction errors, compared to conventional CSP-based systems. The PDCISP is insensitive to alignment errors of retarders and maintains the snapshot feature (1D spatial imaging). The effectiveness of the proposed method is demonstrated by the simulation results.
提出了一种使用双沃拉斯顿棱镜的偏振差分通道成像光谱偏振仪（PDCISP）。它能够同时采集一组对应于正交偏振调制的三通道干涉图。这使得有用通道的光程差范围大幅扩展，并且通过干涉图差分处理可以大大抑制通道光谱偏振仪（CSP）的主要限制，即通道串扰。因此，与传统的基于CSP的系统相比，可以以更少的重建误差获得全分辨率强度光谱以及高分辨率偏振特征。PDCISP对延迟器的对准误差不敏感，并保持快照特征（一维空间成像）。仿真结果证明了该方法的有效性。
