Optical interferometric reception of ultrasonic energy

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

G - Physics

01

N

73/58, 73/0.5

G01N 21/84 (2006.01) G01H 9/00 (2006.01) G01N 29/24 (2006.01)

Patent

CA 1224935

TITLE OPTICAL INTERFEROMETRIC RECEPTION OF ULTRASONIC ENERGY INVENTOR Jean-Pierre Monchalin ABSTRACT OF THE DISCLOSURE 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 Dop- pler effect in an incident laser beam as a result of ultrasonic deforma- tions of a workpiece. Improved stabilization and calibration techniques are disclosed.

468883

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