Off-axis cyclic radial shearing interferometer for measurement of centrally blocked transient wavefront

被引:20
作者
Ling, Tong [1 ]
Liu, Dong [1 ]
Yang, Yongying [1 ]
Sun, Lei [1 ]
Tian, Chao [1 ]
Shen, Yibing [1 ]
机构
[1] Zhejiang Univ, State Key Lab Modern Opt Instrumentat, Hangzhou 310027, Peoples R China
基金
中国国家自然科学基金;
关键词
RECONSTRUCTION; LASER;
D O I
10.1364/OL.38.002493
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
An off-axis cyclic radial shearing interferometer (OCRSI) to test a centrally blocked transient wavefront is proposed. Based on the standard cyclic radial shearing interferometer (CRSI), the OCRSI consists of a beam splitter, two folding mirrors, and a Galilean telescope. With the same but reversal tilt introduced to the two mirrors in OCRSI, the shearing interferogram can be obtained even when the central part of the test aperture is blocked. An improved wavefront retrieval method for OCRSI is employed, and a method to obtain the laterally sheared amount between the contracted and expanded beams is proposed. Numerical simulation and comparison experiments with a ZYGOGPI interferometer demonstrate that the OCRSI exhibits high precision and nice repeatability. (C) 2013 Optical Society of America
引用
收藏
页码:2493 / 2495
页数:3
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