Electronic speckle-pattern interferometer using holographic optical elements for vibration measurements

被引:35
|
作者
Bavigadda, Viswanath [1 ]
Jallapuram, Raghavendra [1 ]
Mihaylova, Emilia [1 ]
Toal, Vincent [1 ]
机构
[1] Dublin Inst Technol, Ctr Ind & Engn Opt, Dublin 8, Ireland
关键词
REFERENCE WAVE; LASER;
D O I
10.1364/OL.35.003273
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We report a simple, compact electronic speckle-pattern interferometer (ESPI) incorporating holographic optical elements (HOEs) for the study of out-of-plane vibration. Reflection and transmission HOEs provide reference and object beams in the interferometer. The alignment difficulties with conventional ESPI systems are minimized using HOEs. The time-average ESPI subtraction method is used to generate the fringe pattern and remove background speckle noise by introducing a phase shift between consecutive images. The amplitude and phase maps are obtained using path-difference modulation. (C) 2010 Optical Society of America
引用
收藏
页码:3273 / 3275
页数:3
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