Accession Number : ADP002475

Title :   Improvements of Laser Interferometric Measurement System of Vibration Displacements,

Corporate Author : YOKOHAMA NATIONAL UNIV (JAPAN)

Personal Author(s) : Adachi,T. ; Okazaki,M. ; Tsuzuki,Y.

Report Date : 1983

Pagination or Media Count : 7

Abstract : Improvements have been made on the laser interferometric measurement system of vibration displacements of quartz crystal resonators. In this paper, the following modifications have been made: the DC phase control and the small-deviation low-frequency phase modulation are introduced on a laser beam. The amplitude of the vibration displacement is obtained as a digital data. A measurement and processing of data are made by the computer system. The improved system can be used to the measurement of vibration displacement down to five angstroms within a few percent repeatibility in the frequency range from 1 MHz to 10 MHz. Using this system, the detailed vibration displacement distributions of a plano convex SC-cut quartz crystal resonators have been measured.

Descriptors :   *Quartz resonators, *Vibrational spectra, *Interferometers, Data acquisition, Measurement, Lasers, Vibration, Displacement reactions, Crystal structure

Distribution Statement : APPROVED FOR PUBLIC RELEASE