Phase shift estimation from variances of fringe pattern differences

被引：47

作者：

Guo, Hongwei ^{[1
]}

Zhang, Zhihui ^{[1
]}

机构：

[1] Shanghai Univ, Lab Appl Opt & Metrol, Dept Precis Mech Engn, Shanghai 200072, Peoples R China

来源：

APPLIED OPTICS | 2013年 / 52卷 / 26期

基金：

中国国家自然科学基金;

关键词：

ITERATIVE ALGORITHM; INTERFEROMETRY; EXTRACTION;

D O I：

10.1364/AO.52.006572

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

This paper presents a simple algorithm for estimating phase shifts from only three interferograms. In it, the fringe pattern differences are computed first in order to remove the background component, and then the variances and further the standard deviations (SDs) of fringe pattern differences are calculated. The phase shifts are estimated, by using the law of cosines, from a triangle whose lengths of sides are the SDs just calculated. This algorithm offers several advantages over others, e.g., being efficient, easy to implement, accurate, and less sensitive to noise. Numerical simulations and an experiment are performed to demonstrate its validity. (c) 2013 Optical Society of America

引用

页码：6572 / 6578

页数：7

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