Accession Number : AD0752744

Title :   A Self-Consistent and Direct Reading Laser Homodyne Measurement Technique.

Descriptive Note : Research memo.,

Corporate Author : GRUMMAN AEROSPACE CORP BETHPAGE N Y RESEARCH DEPT

Personal Author(s) : Pernick,B. J.

Report Date : DEC 1972

Pagination or Media Count : 26

Abstract : The memorandum describes a new experimental procedure for measuring sinusoidal vibration displacement amplitudes by means of a laser homodyne system. Advantages that include a self-checking feature to validate the measurement and a direct readout capability are discussed. Unambiguous displacement amplitude measurements for amplitude values greater than the optical wavelength employed are also shown to be possible. With a calibrated system, rotational vibration amplitudes can be measured. (Author)

Descriptors :   (*VIBRATION, MEASUREMENT), (*NONDESTRUCTIVE TESTING, VIBRATION), TEST EQUIPMENT, LASERS, INTERFEROMETERS, PHASE SHIFT CIRCUITS

Subject Categories : Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE