Method for acquiring the characteristic parameter of the dual-spiral moire fringes

被引：9
作者：
Huang, Lei [1 ]
Su, Xianyu [1 ]
机构：
[1] Sichuan Univ, Optoelect Dept, Chengdu 610064, Peoples R China
来源：
OPTICS LETTERS | 2008年 / 33卷 / 08期
关键词：
D O I：
10.1364/OL.33.000872
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Based on moire phenomena and the Talbot self-imaging effect, dual-spiral moire fringes could be acquired with two spiral gratings. This kind of special moire fringes could be used to test the collimation of the light beam, which was significant in many correlative applications. The characteristic parameter of the dual-spiral moire fringes reflected the collimation condition directly. A method with two algorithms, which were respectively based on Fourier transform and the phase-shifting algorithm, was proposed and simulated to extract the characteristic parameter. The influence of the random noise on the extraction was also analyzed and discussed. (C) 2008 Optical Society of America.
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收藏
页码：872 / 874
页数：3
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