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Moire method to determine separate frequency contributions in vibration patterns

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Abstract

Interference holography with a pulsed ruby laser is used as a tool for analyzing complex mechanical vibrations. With the aid of a moire technique, the combination of two interferograms taken in special, electronically controlled conditions yields the contribution to the vibration pattern corresponding to a single frequency. Quantitative analysis then follows the same lines as in ordinary holographic interferometry.

© 1983 Optical Society of America

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