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Chen Xiao, Xu Rongqing, Shen Zhonghua, Lu Jian, Ni Xiaowu. Reflected laser ultrasonic sensor for testing thickness and its application[J]. LASER TECHNOLOGY, 2003, 27(6): 557-559.
Citation: Chen Xiao, Xu Rongqing, Shen Zhonghua, Lu Jian, Ni Xiaowu. Reflected laser ultrasonic sensor for testing thickness and its application[J]. LASER TECHNOLOGY, 2003, 27(6): 557-559.
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Reflected laser ultrasonic sensor for testing thickness and its application

  • Department of Applied Physics, Nanjing University of Science & Technology, Nanjing, 210094

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  • Received Date: April 24, 2003
  • Revised Date: June 29, 2003
  • Published Date: November 24, 2003
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    • Abstract
  • A new laser ultrasonic sensor for testing samples' thickness is developed.The detection principle is discussed in detail.This sensor has high-frequency response,high sensitivity and is easy to adjust.The sensor is used to detect laser-induced ultrasonic longitude-wave at the epicenter of the rear metallic surface when pulse Nd:YAG laser is focused on polished iron plate.Well-defined longitude-wave and its echo waves are acquired.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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    • References (6)
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