Method and apparatus for non-destructive testing using acoustic-

Details Method and apparatus for non-destructive testing using acoustic- Method and apparatus for non-destructive testing using acoustic-

1984-10-30

1987-05-19

Rosenberger, R. A.

Optics: measuring and testing

For light transmission or absorption

350358, G01N 2100

Patent

active

046663088

ABSTRACT:
Apparatus for non-destructively inspecting a material includes a housing for holding the material with a window in the housing for the transmission of a laser beam and a pressurized fluid within the housing in contact with the material. A first laser source generates a first beam at a first frequency, and the beam is directed through the window and onto said material. A second laser source generates a second beam at a second frequency, the second frequency being related to the first frequency whereby Bragg scattering of the second beam is realized in the pressurized fluid. The second beam is directed through the window and onto said material, and the Bragg scattered second beam is detected.

REFERENCES:
patent: 3424906 (1969-01-01), Korpel
patent: 3431504 (1969-03-01), Adler
patent: 3948345 (1976-04-01), Rosencwaig
patent: 4046477 (1977-09-01), Kaule
patent: 4137991 (1979-02-01), Melcher et al.
patent: 4255971 (1981-03-01), Rosencwaig
patent: 4267732 (1981-05-01), Quate

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