Abstract

A holographic moire technique is developed which allows one to compare the resistance to strength in real time of two nominally identical specimens. The moire interference pattern gives contours of path variations related to the difference in displacements of the two specimens. The method is whole field and noncontacting; it is demonstrated by comparing deflections of two square plates clamped along the edges and subjected to centrally concentrated loads.

© 1984 Optical Society of America

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