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Proceedings Paper

Dynamic Laser Speckle Interferometry Applied To Wave Propagation In Solids
Author(s): F. P. Chiang
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Paper Abstract

When an optically rough surface is illuminated by a laser beam, multiple scattering results in a random inter-pattern called speckles. When these are recorded by double exposure before and after deformation of the surface, interference fringes are obtained upon optical Fourier filtering of the photographic record, and they are indicative of the speckles' spatial displacements. This pheno-menon is exploited in the paper to map stress waves in plates due to transverse and in-plane impact loading. The method of differential speckle interferometry is also introduced which is capable of mapping the particle velocity field of the plate.

Paper Details

Date Published: 27 July 1979
PDF: 4 pages
Proc. SPIE 0189, 13th Intl Congress on High Speed Photography and Photonics, (27 July 1979); doi: 10.1117/12.957591
Show Author Affiliations
F. P. Chiang, State University of New York (United States)

Published in SPIE Proceedings Vol. 0189:
13th Intl Congress on High Speed Photography and Photonics
Shin-Ichi Hyodo, Editor(s)

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