Laser interferometric measurement of the vibration displacements of a plano-convex AT-cut quartz crystal resonator

1 March 1976

journal article
Published by Institute of Electrical and Electronics Engineers (IEEE) in Proceedings of the IEEE

Vol. 64 (3) , 386-387
https://doi.org/10.1109/PROC.1976.10135

Abstract

Detailed vibrational displacement distributions of the thickness-shear modes of a plano-convex AT-cut quartz plate have been measured for the first time utilizing a laser interferometric technique. The technique is unique in that simple introduction of a low-frequency phase modulation into one of the laser beams makes measurements essentially free from the environmental mechanical disturbances, and hence relatively simple optical setups may be used for measuring in-plane vibration displacements down to the order of several angstroms.

Keywords

VIBRATION MEASUREMENT
DISPLACEMENT MEASUREMENT
LASER MODES
OPTICAL RESONATORS
OPTICAL INTERFEROMETRY
MECHANICAL VARIABLES MEASUREMENT
PHASE MEASUREMENT
THICKNESS MEASUREMENT
TIME MEASUREMENT
PHASE MODULATION

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