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Method for Measuring Retardation by Swinging Quarter-Wave Plate with Phase Modulator
Author(s): Li Fanyue1, 2 Han Jie1, 2 Zeng Aijun1, 2 Huang Huijie1 1Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China 2Graduate University of Chinese Academy of Sciences, Beijing 100049, China
Pages: 209-
213
Year: 2011
Issue:
2
Journal: Chinese Journal of Lasers
Keyword: 测量; 偏振; 1/4波片; 相位延迟量; 相位调制器;
Abstract: 提出一种基于相位调制和样品摆动的1/4波片相位延迟量测量方法。准直激光束依次通过起偏器、相位调制器、待测1/4波片和检偏器由光电探测器所接收,光信号被转换成电信号后经过放大、滤波以进行数据处理。利用待测1/4波片的摆动可以计算得到与快轴方位角无关的归一化二次谐波分量,在无需知道1/4波片快轴方位角的情况下得到其相位延迟量。实验中对一块石英1/4波片进行了测量,实验结果与现有快轴方向确定条件下的光弹调制测量方法的测量结果一致,某一快轴方位角上多次测量的重复性为0.13°,不同快轴方位角上多次测量的再现性为0.17°。
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