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NASA NTRS · 19850021970

Dual differential interferometer

Abstract

A dual two-beam differential interferometer that measures both the amplitude and orientation of propagating, broadband surface acoustic waves is disclosed. Four beams are focused on a surface. The four reflected beams are separated into two pairs. The two pairs are detected to produce two signals that are used to compute amplitude and orientation.

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Claus, R. O., Turner, T. M.. 1985-04-23. Dual differential interferometer. https://ntrs.nasa.gov/citations/19850021970

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