DEVICE AND METHOD FOR ULTRASONIC NONDESTRUCTIVE TESTING USING A LASER
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United States of America Patent
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Issued Date -
Dec 26, 2013
app pub date -
Feb 14, 2012
filing date -
Feb 14, 2011
priority date (Note) -
Abandoned
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Abstract
Device and method for the nondestructive testing of a part made of a composite material reinforced with fibers, the device including: a) an energizing laser beam generator and elements for producing a photoelastic stress pattern of the surface of the part, in an energizing area, using the laser beam; b) elements for generating a first detection laser beam capable of illuminating the part in a target area; c) elements for generating a second reference detection laser beam, whose characteristics can be controlled independently of those of the detection laser beam; d) a two-wave photoreactive detector including a photorefractive crystal pumped by the reference laser beam; e) elements for collecting the beam reflected by the target area of the first detection laser and conveying the beam into the photorefractive detector; and f) elements for modifying the characteristics of the reference laser so as to adjust the bandwidth of the photorefractive detector.
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