29 April 1999 State of the art in laser ultrasonic sensors using nonlinear optics
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Proceedings Volume 3729, Selected Papers from International Conference on Optics and Optoelectronics '98; (1999) https://doi.org/10.1117/12.346777
Event: Selected Papers from the International Conference on Optics and Optoelectronics, 1998, Dehradun, India
Abstract
Laser-based ultrasonic systems for non destructive testing and evaluation rely on the coherent detection of phase modulation imprinted on the beam by the vibrating surface. As this detection principle requires an exact superposition of the wave issued from the target with a plane reference wave, these devices only operate with a plane wave signal beam. This constraint strongly limits the spread of laser ultrasonic systems in industry. We will show how the use of dynamic holographic materials allows to implement adaptive interferometers with a large light gathering power. Two different systems that have recently led to industrial developments, will be presented and compared. Requirements for the dynamic material to be used will be discussed. Performances for ultrasound detection will be finally given.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Philippe Delaye, Philippe Delaye, Gerald Roosen, Gerald Roosen, } "State of the art in laser ultrasonic sensors using nonlinear optics", Proc. SPIE 3729, Selected Papers from International Conference on Optics and Optoelectronics '98, (29 April 1999); doi: 10.1117/12.346777; https://doi.org/10.1117/12.346777
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