Nondestructive Testing Using TRW Acousto-Optical Imaging System
Interim rept. 1 Jul 1971-1 Jan 1972
TRW SYSTEMS GROUP REDONDO BEACH CA ADVANCED TECHNOLOGY STAFF GROUP
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The technique of acousto-optical imaging AOI enables one to see, on a real-time basis, within optically opaque materials and to detect internal or surface flaws andor other irregularities which mist be present. The process uses an ultrasonic beam to probe the object under study. As it interacts with the object, the ultrasonic beam acquires an acoustical picture of the object. The acoustic waves then interact with a monochromatic light beam as from a laser. Optical sidebands are produced by the Bragg diffraction of light. The cumulative result of this process is that these sidebands produce a visual image of the interior of the object. The report discusses the results of an analytical and experimental study to evaluate the applicability of acousto- optical imaging to nondestructive testing.
- Test Facilities, Equipment and Methods