Acousto-optical visualization development by Bragg diffraction

Details Acousto-optical visualization development by Bragg diffraction Acousto-optical visualization development by Bragg diffraction

Sep 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977stia...7750990g&link_type=abstract

(Congres International d'Acoustique, 9th, Madrid, Spain, July 4-9, 1977.) ONERA, TP no. 1977-89, 1977. 20 p. In French.

Physics

Optics

Acousto-Optics, Bragg Angle, Imaging Techniques, Transparence, Ultrasonic Flaw Detection, Wave Diffraction, Image Resolution, Mercury (Metal), Metal Plates, Spacecraft Construction Materials

Scientific paper

A real time imaging device, providing transparency informations of objects, has been developed. The mechanism is based upon properties of imaging ultrasonic fields by a coherent optical wave. Relative transparence of metallic objects is considerably enhanced by use of mercury, instead of water, for a coupling medium. Metallic samples of TA6V-titanium, including calibrated defects (flat-bottomed holes and surface striations), similar to blocks used in nondestructive testing of aeronautic products have been successfully visualized; each defect kind is detected by the apparatus. Results about real pieces are then presented.

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