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Dual differential interferometerA 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.
Document ID
19850021970
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
Claus, R. O. (Virginia Polytechnic Inst. and State Univ. Blacksburg, United States)
Turner, T. M. (Virginia Polytechnic Inst. and State Univ. Blacksburg, United States)
Date Acquired
August 12, 2013
Publication Date
April 23, 1985
Subject Category
Instrumentation And Photography
Report/Patent Number
Patent Number: NASA-CASE-LAR-12966-1
Patent Number: US-PATENT-4,512,661
Patent Application Number: US-PATENT-APPL-SN-414237
Accession Number
85N30282
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
NASA-CASE-LAR-12966-1|US-PATENT-4,512,661
Patent Application
US-PATENT-APPL-SN-414237

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