Experiment study on laser generating the surface acoustic waves
Chinese Optics Letters, Vol. 3, Issue S1, pp. S329-S331 (2005)
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Abstract
In the field of nondestructive evaluation, laser generation and detection of the surface acoustic waves (SAWs) are potentially useful for investigating material surfaces. SAW generated by laser line source is carried out on a kind of optical difference detection system based on optical beam deflection technique. The setup is simple and easy to adjust. Furthermore the system has advantages such as high efficiency of photo-electricity conversion, high frequency responding, the ability of ant-intervene and broadband detection etc.. It can be used not only to receive SAW, but also to detect surface-breaking defects in material. The experimental results verify that the SAWs generated by a line source have the advantages of powerful signal and good directivity. SAWs have been excited on sample aluminum with artificial surface-breaking defects. From the experiment, we attain the characters of reflected wave and transmitted wave by SAW interacted with the surface-breaking defects.
© 2005 Chinese Optics Letters
OCIS Codes
(110.7170) Imaging systems : Ultrasound
(120.4290) Instrumentation, measurement, and metrology : Nondestructive testing
(140.3460) Lasers and laser optics : Lasers
(230.1150) Optical devices : All-optical devices
(240.6690) Optics at surfaces : Surface waves
Citation
Gang Yan, Zhonghua Shen, Jian Lu, and Xiaowu Ni, "Experiment study on laser generating the surface acoustic waves," Chin. Opt. Lett. 3, S329-S331 (2005)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-3-S1-S329
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