Ultrasonic wave measurement by differential interferometry

The theory and performance of a two beam differential interferometer for measurement of both surface and bulk waves are described. The system is insensitive to small errors (<1 mm) in focus or in specimen flatness. Both amplitude and phase measurements are demonstrated. The system has been absolu...

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Bibliographic Details
Published inApplied optics (2004) Vol. 16; no. 7; p. 1849
Main Authors Palmer, C H, Claus, R O, Fick, S E
Format Journal Article
LanguageEnglish
Published United States 01.07.1977
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Summary:The theory and performance of a two beam differential interferometer for measurement of both surface and bulk waves are described. The system is insensitive to small errors (<1 mm) in focus or in specimen flatness. Both amplitude and phase measurements are demonstrated. The system has been absolutely calibrated and can detect 6 x 10(-4)-A surface wave displacements on glass.
ISSN:1559-128X
DOI:10.1364/AO.16.001849