Accession Number : AD0770882
Title : Digitizing Holographic Data.
Descriptive Note : Final rept. 11 Aug 72-30 Sep 73,
Corporate Author : GENERAL ELECTRIC CO SYRACUSE N Y ELECTRONICS LAB
Personal Author(s) : Nelligan,John D.
Report Date : NOV 1973
Pagination or Media Count : 73
Abstract : Time Average holographic interferograms of a 5 x 5 array of AN/SQS-23 active sonar transducer element were subjected to digital processing in an effort to extract amplitudes of vibration as a function of face location. The degree of additional noise imputed to the data by the intermediate transparency together with the lack of a static interferogram for reference purposes renders the extraction of fringe loci by global double threshold techniques impracticable. Recommendations for successful extraction are presented. (Author)
Descriptors : *Sonar transducers, *Holography, *Signal processing, Vibration, Interferometers, Digital systems
Subject Categories : Acoustic Detection and Detectors
Distribution Statement : APPROVED FOR PUBLIC RELEASE