Title :
Ultrasoud detection based on confocal Fabry-Perot interferometer
Author :
Shaoze Wang ; Xinyu Zhao ; Zongxing Lu
Author_Institution :
Key Lab. of Fundamental Sci. for Adv. Machining, Beijing Inst. of Technol., Beijing, China
Abstract :
Laser ultrasonic technology has been paid more and more attention in the NDT field due to its outstanding ability of non-contact measurements. As a good vibration measurement technology, CFPI (confocal Fabry-Perot interferometer) method is sensitive to the laser frequency shift caused by the ultrasonic wave propagation. In this paper, a laser ultrasonic receiver system based on the CFPI method is established, and the system parameters are analyzed in order to obtain an optimal resolution. Also some initial experiment results are presented to certify this system ability.
Keywords :
Fabry-Perot interferometers; measurement by laser beam; photoacoustic spectroscopy; ultrasonic materials testing; confocal Fabry-Perot interferometer; laser frequency shift; laser ultrasonic receiver system; laser ultrasonic technology; ultrasonic wave propagation; ultrasound detection; vibration measurement technology; Acoustics; Cavity resonators; Laser beams; Laser stability; Measurement by laser beam; Optical interferometry; Surface emitting lasers; CFPI; laser ultrasonic technology; non-contact;
Conference_Titel :
Nondestructive Evaluation/Testing: New Technology & Application (FENDT), 2013 Far East Forum on
Conference_Location :
Jinan
Print_ISBN :
978-1-4673-6018-0
DOI :
10.1109/FENDT.2013.6635542
