Zhang Chunmin, Zhao Jianke, Sun Yao
Ministry of Education Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Science, Xi’an Jiaotong University, Xi'an 710049, China.
Appl Opt. 2011 Jul 10;50(20):3497-504. doi: 10.1364/AO.50.003497.
After reviewing the spectrum-dividing principle of the Savart polariscope (SP) in the polarization interference imaging spectrometer (PIIS) that we developed, we analyze the influences of the thickness, misalignment, and dispersion of the SP on the optical path difference (OPD). The theoretical expression of the OPD for the misalignment of the SP optical axis is deduced, and the OPD is analyzed when the incident plane is parallel, at 45°, or orthogonal to the principal section of the left plate of the SP. The selective thickness of the single Savart plate is analyzed when it is placed at the ideal and misalignment positions. The influence of dispersion of the SP on the OPD is analyzed when the misalignment error is ±1'. The relationships between the OPD and wavelength are simulated and validated with experiments. This work can provide theoretical and practical guidance for the design, calibration, modulation, innovation, experiment, and engineering of the PIIS.
在回顾了我们所研制的偏振干涉成像光谱仪（PIIS）中萨伐尔偏光镜（SP）的分光原理后，我们分析了SP的厚度、失准和色散对光程差（OPD）的影响。推导了SP光轴失准时光程差的理论表达式，并分析了入射面与SP左板主截面平行、成45°或正交时的光程差。分析了单块萨伐尔板置于理想位置和失准位置时的选择厚度。当失准误差为±1'时，分析了SP色散对光程差的影响。模拟了光程差与波长之间的关系，并通过实验进行了验证。这项工作可为PIIS的设计、校准、调制、创新、实验和工程提供理论和实践指导。
