Laser ultrasonic measurement of surface defects based on ratio method

Gang Li; Hedong Yu; Guoping Zhang

doi:10.1117/12.694443

10 June 2006 Laser ultrasonic measurement of surface defects based on ratio method

Gang Li, Hedong Yu, Guoping Zhang

Proceedings Volume 6344, Advanced Laser Technologies 2005; 634439 (2006) https://doi.org/10.1117/12.694443
Event: Advanced Laser Technologies 2005, 2005, Tianjin, China

Abstract

Laser-induced ultrasonic technology has been extensively studied and widely applied recently, for its advantages such as noncontract operation, nondestructive testing, broad bandwidth, high time, and space resolution, no shape limits on samples, etc. Firstly, the principles of laser ultrasonic generation and detection were introduced. Secondly, the application of the ultrasonic ratio method in measuring the surface defects was presented in detail. The experimental results were analyzed. Because the ratio method avoids measuring the velocity of the surface wave and reduces the experimental error, it is much more practical, reliable and effective in surface defect measurements.

Citation Download Citation

Gang Li, Hedong Yu, and Guoping Zhang "Laser ultrasonic measurement of surface defects based on ratio method", Proc. SPIE 6344, Advanced Laser Technologies 2005, 634439 (10 June 2006); https://doi.org/10.1117/12.694443

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