Digital speckle shearing interferometer using a liquid-crystal spatial light modulator

被引：16

作者：

Zhao, Shuai ^{[1
]}

Chung, Po Sheun ^{[1
]}

机构：

[1] City Univ Hong Kong, Dept Elect Engn, Kowloon, Hong Kong, Peoples R China

来源：

OPTICAL ENGINEERING | 2006年 / 45卷 / 10期

关键词：

shearing interferometer; shearography; spatial light modulators; diffractive optics; optical testing;

D O I：

10.1117/1.2360940

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A digital speckle shearing interferometer is developed using a dynamic binary phase grating realized by an electrically addressed, twisted nematic liquid-crystal spatial light modulator as the shearing element. The standard phase-shifting algorithm can be easily achieved by changing the grating pattern displayed on the spatial light modulator. The method has a number of advantages including variable sensitivity, no moving part, and no requirement for calibration of the value of the phase shift. The error due to the unexpected diffraction order is also discussed. (c) 2006 Society of Photo-Optical Instrumentation Engineers.

引用

页数：5

共 15 条

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