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Hamamatsu Corp. - Earth Innovations LB 2/24

Laser Camera Illuminates Ultrasonic Waves

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Barbara Grant

Conventional ultrasound techniques require that a transducer be attached to a sample surface for both signal generation and detection. Laser ultrasound, which uses one laser pulse to generate a signal and another to detect small surface displacements, can provide a noncontact method for ultrasonic measurements. To map the results over the sample surface using either method, the detection beam must be scanned during repeated excitation of the ultrasonic signal, a time-consuming process in which only a few tens to hundreds of sample points may be collected. The Idaho National Engineering and...Read full article

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    Published: April 1999
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