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Proceedings Paper

Bragg-Diffraction Imaging And It's Application For Non Destructive Testing
Author(s): J. Landry; G. Wade
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Paper Abstract

Though nature abounds with sonic detecting systems, men have been slow to recognize the potential use of acoustic energy as a means of visualization, that is, for "seeing" with sound. In the 18th Century a rather inventive Italian scientist named Spallanzani carried out a study of the remarkable ability possessed by bats for avoiding obstacles in the dark. (Ref. 1) He and his co-workers finally concluded that bats must have some unknown "sixth sense". One hundred years later the Frenchman Langevin proposed a sonic-echo system as a possible means of locating objects submerged in the sea, German U-boats in particular. Shortly after, Hartridge recognized and suggested a possible similarity between Langevin's system and the system used by bats (Ref. 2,3).

Paper Details

Date Published: 1 August 1972
PDF: 8 pages
Proc. SPIE 0029, Imaging Techniques for Testing and Inspection, (1 August 1972); doi: 10.1117/12.978148
Show Author Affiliations
J. Landry, University of California (United States)
G. Wade, University of California (United States)


Published in SPIE Proceedings Vol. 0029:
Imaging Techniques for Testing and Inspection
John C. Urbach; Byron B. Brenden; Robert Apprahamian, Editor(s)

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