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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Editor: Zhizhan Xu
  • Vol. 10, Iss. 11 — Nov. 1, 2012
  • pp: 111403–111403

Application of ultrasonic surface waves in the detection of microcracks using the scanning heating laser source technique

Jia Li, Liming Dong, Chenyin Ni, Zhonghua Shen, and Hongchao Zhang  »View Author Affiliations


Chinese Optics Letters, Vol. 10, Issue 11, pp. 111403-111403 (2012)


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Abstract

This letter reports the application of the scanning heating laser source technique to detect microcracks that may be undetected by conventional methods. In the proposed approach, we monitor changes in the transmitted surface acoustic waves (SAWs) as a heating source is scanned over the crack. The experimental system for microcrack detection by a scanning heating laser source is obtained by exploiting the strong dependence of the transmission efficiency of acoustic pulses on the state of the contacts, whether open or closed, between the crack faces. Microcracks can be detected successfully by confirming the heating position at the point of maximal improvement of the transmission efficiency of the SAWs.

© 2012 Chinese Optics Letters

OCIS Codes
(140.6810) Lasers and laser optics : Thermal effects
(350.7420) Other areas of optics : Waves

ToC Category:
Lasers and Laser Optics

Citation
Jia Li, Liming Dong, Chenyin Ni, Zhonghua Shen, and Hongchao Zhang, "Application of ultrasonic surface waves in the detection of microcracks using the scanning heating laser source technique," Chin. Opt. Lett. 10, 111403-111403 (2012)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-10-11-111403


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