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:

1972-12-01

Pagination or Media Count:

26.0

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