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Holographic interferometry with an injection seeded Nd:YAG laser and two reference beamsThe performance of twin injection seeded Nd:YAG lasers is compared with the performance of an argon-ion laser for recording dual-reference-beam holograms in AGFA 8E56 emulsion. Optical heterodyning is used to measure interference, and the results are expressed in terms of heterodyning signal level and intensity signal-to-noise. The Nd:YAG laser system is to be used for optical inspections of structures for cracks, defects, gas leaks, and structural changes.
Document ID
19890015220
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Decker, Arthur J. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 5, 2013
Publication Date
May 1, 1989
Subject Category
Instrumentation And Photography
Report/Patent Number
E-4809
NASA-TM-102056
NAS 1.15:102056
Accession Number
89N24591
Funding Number(s)
PROJECT: RTOP 582-01-11
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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