Publisher's Synopsis
The 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. Decker, Arthur J. Glenn Research Center NASA-TM-102056, E-4809, NAS 1.15:102056 RTOP 582-01-11.
