Optical interferometric reception of ultrasonic energy

Details Optical interferometric reception of ultrasonic energy Optical interferometric reception of ultrasonic energy

1985-11-04

1987-04-21

Willis, Davis L.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

73657, 356358, G01B 902

Patent

active

046592245

ABSTRACT:
Non-contact reception of ultrasonic waves is accomplished by the use of a laser beam and an interferometer of the confocal Fabry-Perot type. The interferometer detects the frequency shift caused by the Doppler effect in an incident layer beam as a result of ultrasonic deformations of a workpiece. Improved stabilization and calibration techniques are disclosed.

REFERENCES:
patent: 4129041 (1978-12-01), Bickel
patent: 4379633 (1983-04-01), Bickel et al.
Jackson et al., "Measurement of Supersonic Velocity and Turbulence by Laser Anemometry", J. Phys. E, vol. 4, No. 3, pp. 173-177, 3/71.
Jackson et al., "Supersonic Velocity and Turbulence Measurements using a Fabry-Perot Interferometer", AGARD Conference Proceedings No. 193 on Applications of Non-Intrusive Instrumentation in Fluid Flow Research, Saint-Louis, France, 5/76, pp. 6-1 to 6-13.

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