Dual differential interferometer

Details Dual differential interferometer Dual differential interferometer

1982-09-02

1985-04-23

Willis, Davis L.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

73657, 356358, G01B 902

Patent

active

045126615

ABSTRACT:
A dual two-beam differential interferometer that measures both the amplitude and orientation of propagating, broadband surface acoustic waves. 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.

REFERENCES:
patent: 3788750 (1974-01-01), Maltby, Jr. et al.
patent: 4126392 (1978-11-01), House
patent: 4255055 (1981-03-01), Schave
Palmer, "Ultrasonic Surface Wave Detection by Optical Interferometry" J. Acoust. Soc. Am., vol. 53, No. 3, pp. 948-949, 3/73.

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