Analysis of errors in polarimetry using a rotating waveplate

Liang Yu; Qu Zhongquan; Zhong Yue; Song Zhiming; Li Shaoying

摘要

Modulation using a rotating waveplate is the most popular way in astronomy to obtain radiation polarization states and thus the physical condition of celestial bodies. Modulation error analysis of the rotating quarter-waveplate polarimeter is presented in this paper. In terms of geometric dimensions, three modulation error sources are analyzed: the waveplate axial error, waveplate rotation axis tip-tilt error (zenithal error), and position error of the waveplate fast axis (azimuthal error). The dispersion deviation, as another dimension of modulator error, is also studied in this paper. In theory, two factors affect the accuracy of polarization measurement using waveplate polarimetry: retardance delta and fast axis position theta. The temperature property of the waveplate, which represents the axial error, the waveplate mounting tip-tilt error, which represents the zenithal error, and the wavelength-based retardance characteristic, which represents the dispersion property of the waveplate, belong to the retardance error. The motorized rotary stage home position error and the random sample rotating position error, representing the azimuthal error, belong to the fast axis position error. These factors will be analyzed in detail here. Based on these analyses, the maximum allowable upper limits for each error source under 1 x 10(-4) polarization measurement accuracy are presented. Also, feasible solutions are proposed to address these errors. (C) 2019 Optical Society of America

机译：使用旋转波形的调制是天文学中最受欢迎的方式，以获得辐射偏振态，从而获得天体的身体状况。本文提出了旋转四分之一波片偏振仪的调制误差分析。在几何尺寸方面，分析了三个调制误差源：波片轴向误差，波片旋转轴尖端倾斜误差（鸟位误差），以及波片快速轴的位置误差（方位角误差）。本文还研究了作为调制器误差的另一维度的分散偏差。从理论上讲，两个因素利用波形偏振仪的极化测量的准确度：延迟δ和快速轴位置θ。表示轴向误差的波形的温度特性，表示尖端误差的波片安装尖端误差，以及表示波片的色散性的基于波长的延迟特性，属于延迟误差。电动旋转级原点误差和表示方位角误差的随机样品旋转位置误差属于快速轴位置误差。这里将详细分析这些因素。基于这些分析，提出了1×10（-4）偏振测量精度下的每个误差源的最大允许上限。此外，提出了可行的解决方案来解决这些错误。（c）2019年光学学会

Analysis of errors in polarimetry using a rotating waveplate

摘要

著录项

相关主题

期刊订阅