Title :
Acoustic-surface-wave amplitude and phase measurements using laser probes
Author :
De La Rue, Richard M. ; Humphryes, R.F. ; Mason, I.M. ; Ash, E.A.
Author_Institution :
University of Glasgow, Department of Electronics & Electrical Engineering, Glasgow, UK
fDate :
2/1/1972 12:00:00 AM
Abstract :
The investigation of acoustic-field distributions on free surfaces is important in several different classes of application. Measurements of the phase of acoustic surface waves using optical probes allow direct measurement of their velocity. A number of different optical-probe types are compared on the basis of sensitivity and stability. The operation and design of an optical heterodyne probe, capable of high-precision phase and group-velocity measurement, is described.
Keywords :
acoustic variables measurement; holography; phase measurement; probes; acoustic field distributions; acoustic surface waves; free surfaces; group velocity measurement; laser probes; optical heterodyne probe; phase measurement; probes; sonic measurements; surface phenomena;
Journal_Title :
Electrical Engineers, Proceedings of the Institution of
DOI :
10.1049/piee.1972.0021
