Comparative Method Of Fringe Evaluation For Electronic Speckle Pattern Interferbmetry

Boxiang Lu; Xiangyang Yang; Harald Abendroth; Elmar Ficker

doi:10.1117/12.950251

31 March 1989 Comparative Method Of Fringe Evaluation For Electronic Speckle Pattern Interferbmetry

Boxiang Lu, Xiangyang Yang, Harald Abendroth, Elmar Ficker

Proceedings Volume 1026, Holography Techniques and Applications; (1989) https://doi.org/10.1117/12.950251
Event: 1988 International Congress on Optical Science and Engineering, 1988, Hamburg, Germany

Abstract

A new method is proposed for the fringe evaluation in electronic or digital speckle pattern interferometry (ESPI or DSPI). A series of interferometric speckle patterns, at least three, are recorded and stored during the deformation of the object. The subtraction of each two of the speckle patterns gives the correlation fringes corresponding to the deformation between the two exposures. These correlation patterns are interrelated. The phase differences between each two exposures can be determined by comparing the phase relationship between these correlation fringe patterns. The method is suitable for dynamic or large deformation measurement. The principle of this method is discussed and the computer simulation and experimental results are given.

Citation Download Citation

Boxiang Lu, Xiangyang Yang, Harald Abendroth, and Elmar Ficker "Comparative Method Of Fringe Evaluation For Electronic Speckle Pattern Interferbmetry", Proc. SPIE 1026, Holography Techniques and Applications, (31 March 1989); https://doi.org/10.1117/12.950251

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KEYWORDS

Speckle pattern

Fringe analysis

Interferometry

Computer simulations

Holography

Speckle

Phase shifts

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