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Proceedings Paper

Electronic speckle pattern interferometric vibration fringes
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Paper Abstract

In this paper a comparison of different techniques to obtain vibration patterns by phase stepping on an electronic speckle pattern interferometer (ESPI) is made. The theoretical evaluation of the contrast of the fringes shows that the (pi) phase step method gives good contrast; however, the four step method gives the same contrast along with better pictorial representation. Speckle averaging on the other hand also increases the contrast of the fringes apart from smoothing of speckles. Experimental results corroborating the theoretical predictions are also presented.

Paper Details

Date Published: 2 September 1992
PDF: 9 pages
Proc. SPIE 1779, Optical Design and Processing Technologies and Applications, (2 September 1992); doi: 10.1117/12.140959
Show Author Affiliations
Charles Joenathan, Rose-Hulman Institute of Technology (United States)
Brij M. Khorana, Rose-Hulman Institute of Technology (United States)


Published in SPIE Proceedings Vol. 1779:
Optical Design and Processing Technologies and Applications

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