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Coherent gradient sensing: a Fourier optics analysis and applications to fracture

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Abstract

A Fourier optics analysis for a recently developed lateral shearing interferometry—coherent gradient sensing—is presented. The governing equations for the method are explicitly derived. The method of coherent gradient sensing is particularly suitable for investigating the mechanics of fracture of transparent and opaque solids. Several examples demonstrating the applicability of the method to quasistatic and dynamic crack-growth problems is presented.

© 1992 Optical Society of America

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