Lateral shearing interferometer with variable shearing for measurement of a small beam

被引：12
|
作者：
Liu, Lei [1 ,2 ]
Zeng, Aijun [1 ,2 ]
Zhu, Linglin [1 ]
Huang, Huijie [1 ,2 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
OPTICS LETTERS | 2014年 / 39卷 / 07期
关键词：
SURFACES;
D O I：
10.1364/OL.39.001992
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A lateral shearing interferometer with variable shearing for measurement of a small beam is proposed. The interferometer is composed of a polarization beam splitter, a thick birefringent plate, a quarter-wave plate, a mirror, and an image sensor. The shearing amount can be tiny by using the thick birefringent plate as the shear generator. The shearing amount of the interferometer can be continuously adjusted by rotating the thick birefringent plate, and 2D interferograms can be obtained by rotating the thick birefringent plate along the mutually perpendicular directions. The optical path difference is compensated with a double lateral shearing by using a quarter-wave plate and a mirror. The interferometer is verified by simulation and experiment; the experiment result is well coincident with the simulation result. The usefulness of the interferometer is verified. (C) 2014 Optical Society of America
引用
收藏
页码：1992 / 1995
页数：4
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