Automatic Processing Of Speckle Photography Fringes: Comparison Of Two Methods

G. H. Kaufmann; H. D. Navone

doi:10.1117/12.967398

1 January 1987 Automatic Processing Of Speckle Photography Fringes: Comparison Of Two Methods

G. H. Kaufmann, H. D. Navone

Proceedings Volume 0813, Optics and the Information Age; (1987) https://doi.org/10.1117/12.967398
Event: 14th Congress of the International Commission for Optics, 1987, Quebec, Canada

Abstract

Speckle photography is a powerful method for measuring in-plane displacement and surface rotation. Quantitative evaluation is performed using a pointwise approach based in the analysis of cosine square fringes which modulate a diffraction halo. The fringe spacing is inversely proportional to the displacement of the speckle pattern and the fringes are perpendicular to the displacement vector. Complete analysis of a 2-D strain field involves the measurement of the spacing and the direction of the fringe pattern on a square mesh covering the specklegram. However, this manual procedure becomes impractical when a large number of measurements are needed.

Citation Download Citation

G. H. Kaufmann and H. D. Navone "Automatic Processing Of Speckle Photography Fringes: Comparison Of Two Methods", Proc. SPIE 0813, Optics and the Information Age, (1 January 1987); https://doi.org/10.1117/12.967398

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