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

来源：

OPTICS LETTERS | 2010年 / 35卷 / 19期

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

页码：3273 / 3275

页数：3

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