Real-time measurement of retardation of a quarter-wave plate using Wollaston prism
Real-time measurement of the retardation of the quarter-wave plate (QWP) using a Wollaston prism is presented. The collimated beam passes through a circular polarizer,the quarter-wave plate to be measured,a standard quarter-wave plate and then is split by a Wollaston prism. Two sub-beams are detected by a bi-cell detector. From two detection signals,the retardation of the QWP is obtained in real time and is independent of the fast axis azimuth of QWP. At the same time,the method is easy to expand to measure the retardation of the QWP used in deep ultraviolet band and the retardation distribution of the QWP. In experiments,the average and the standard deviation of the retardation of quarter-wave plate are respectively 89.5 and 0.25°. The usefulness of the method is verified.
retardation fast axis azimuth quarter-wave plate bi-cell detector
Qiao Yuan Aijun Zeng Linglin Zhu Lexing Zheng Huijie Huang
Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Peoples Republic of China
国际会议
西安
英文
382-384
2011-12-23（万方平台首次上网日期，不代表论文的发表时间）