Error analysis and optimal design of polarization calibration unit for solar telescope
Error analysis and optimal design of polarization calibration unit for solar telescope
复制标题
太阳望远镜偏振校准装置误差分析与优化设计
DOI：
10.1088/1674-1056/26/8/089501
复制
发表时间：
2017
影响因子：
1.7
通讯作者：
Zhang Zhi-Yong
中科院分区：
文献类型：
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作者：
Hou Jun-Feng;Wang Dong-Guang;Deng Yuan-Yong;Sun Ying-Zi;Zhang Zhi-Yong
偏振定标器（PCU）已成为太阳望远镜中消除仪器偏振不可缺少的元件，其性能的好坏直接影响到定标的精度。本文从偏振光理论出发，对PCU引起的测量误差进行了分析，发现波片的不完整性是引起PCU标定误差的主要原因。提出了一种优化的标定方法，避免了波片缺陷的影响，并通过分析标定误差与光强不稳定性之间的关系，对偏振精度进行了数值模拟。这项工作对于偏振精度高达10 − 4 Ic的太阳望远镜非常重要。
Polarization calibration unit (PCU) has become an indispensable element for solar telescopes to remove the instrumental polarization; the polarimetric accuracy of calibration depends strongly on the properties of PCU. In the paper, we analyze the measurement errors induced by PCU based on polarized light theory and find that the imperfections of the waveplate generate the main calibration errors. An optimized calibration method is proposed to avoid the effects from waveplate imperfections, and a numerical simulation is given to evaluate the polarization accuracy by analyzing the relation between calibration error and intensity instability. The work is very important for solar telescopes with high polarization precision up to 10 − 4 I c .
DOI：
--
发表时间：
2014-10
期刊：
--
影响因子：
--
作者：
K. Nagendra;J. Stenflo;Q. Qu;M. Samooprna
通讯作者：
K. Nagendra;J. Stenflo;Q. Qu;M. Samooprna