Apparatus for producing ultrasonic waves in a workpiece
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United States of America Patent
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Apr 12, 1983
Grant Date -
N/A
app pub date -
Sep 3, 1981
filing date -
Nov 6, 1980
priority date (Note) -
Expired
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Abstract
Laser light for producing acoustic waves in a specimen to be examined is carried to the specimen from a single laser by a plurality of fiber optic cables. The fiber optic cables have different path lengths to cause a specific time delay between adjacent fiber optic cables to focus and steer the sonic waves in a desired direction.
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