Method and apparatus for ultrasonic laser testing

Details Method and apparatus for ultrasonic laser testing Method and apparatus for ultrasonic laser testing

G - Physics

01

N

G01N 29/14 (2006.01) G01H 9/00 (2006.01) G01N 29/34 (2006.01) G01N 29/36 (2006.01)

Patent

CA 2651611

The present invention for detecting ultrasonic displacements includes a detection laser (320) to generate a first pulsed laser beam to generate the ultrasonic surface displacement on a surface of the target (150). A second pulsed laser beam to detect the ultrasonic surface displacement on a surface of the target (ISO). Collection optics to collect phase modulated light from the first pulsed laser beam either reflected or scattered (131) by the target (150). An interferometer which processes the phase modulated light and generate at least one output signal. A processor that processes the at least one output signal to obtain data representative of the ultrasonic surface displacements at the target (150).

La présente invention concerne une méthode de détection de mouvements ultrasoniques comprend un laser de détection (320) pour générer un premier faisceau laser pulsé afin de provoque le mouvement ultrasonique sur la surface d'une cible (150). Un second faisceau laser pulsé détecte le mouvement ultrasonique sur la surface de la cible (ISO). Des éléments optiques recueillent la lumière modulée en phase du premier faisceau laser qui est réfléchi ou dispersé (131) par la cible (150). Un interféromètre qui traite la lumière modulée en phase et émet au moins un signal de sortie. Un processeur traite au moins un signal de sortie pour obtenir des données représentatives des mouvements de surface ultrasoniques sur la cible (150).

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