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Method and apparatus for detecting internal structures of bulk objects using acoustic imaging

Patent ·
OSTI ID:874495
 [1];  [1]
  1. Idaho Falls, ID
+ Show Author Affiliations

Apparatus for producing an acoustic image of an object according to the present invention may comprise an excitation source for vibrating the object to produce at least one acoustic wave therein. The acoustic wave results in the formation of at least one surface displacement on the surface of the object. A light source produces an optical object wavefront and an optical reference wavefront and directs the optical object wavefront toward the surface of the object to produce a modulated optical object wavefront. A modulator operatively associated with the optical reference wavefront modulates the optical reference wavefront in synchronization with the acoustic wave to produce a modulated optical reference wavefront. A sensing medium positioned to receive the modulated optical object wavefront and the modulated optical reference wavefront combines the modulated optical object and reference wavefronts to produce an image related to the surface displacement on the surface of the object. A detector detects the image related to the surface displacement produced by the sensing medium. A processing system operatively associated with the detector constructs an acoustic image of interior features of the object based on the phase and amplitude of the surface displacement on the surface of the object.

Research Organization:
Idaho National Engineering and Environmental Laboratory, Idaho Falls, ID
DOE Contract Number:
AC07-94ID13223
Assignee:
Bechtel BWXT Idaho, LLC (Idaho Falls, ID)
Patent Number(s):
US 6401540
OSTI ID:
874495
Country of Publication:
United States
Language:
English

References (4)

Field Propagation via the Angular Spectrum Method book January 1997
Holographic Reconstruction of Acoustic Fields By Discrete Convolution book January 1997
Propagation of Acoustical Waves book January 1972
Shape Reconstruction of a Penetrable Scattering Body via Diffracted Waves and Canonical Solutions book January 1997

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