A novel laser ultrasonic sensor for testing thickness

Details A novel laser ultrasonic sensor for testing thickness A novel laser ultrasonic sensor for testing thickness

Feb 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005spie.5634..727x&link_type=abstract

Advanced Sensor Systems and Applications II. Edited by Rao, Yun-Jiang; Kwon, Osuk Y.; Peng, Gang-Ding. Proceedings of the SPIE,

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A new laser ultrasonic sensor for testing samples' thickness is developed. This sensor has high-frequency response and high sensitivity. Furthermore it is easy to adjust. When the sensor is used to focus on polished iron plate, well-defined longitude-wave and its echo waves can be obtained. Based on the experimental results, the sample"s thickness can be deduced. The theoretical and experimental results are in good agreement with relative error of 0.5%.

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