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Proceedings Paper

Optical air-coupled NDT system with ultra-broad frequency bandwidth (Conference Presentation)
Author(s): Balthasar Fischer; Wolfgang Rohringer; Thomas Heine
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Paper Abstract

We present a novel, optical ultrasound airborne acoustic testing setup exhibiting a frequency bandwidth of 1MHz in air. The sound waves are detected by a miniaturized Fabry-Pérot interferometer (2mm cavity) whilst the sender consists of a thermoacoustic emitter or a short laser pulse We discuss characterization measurements and C-scans of a selected set of samples, including Carbon fiber reinforced polymer (CFRP). The high detector sensitivity allows for an increased penetration depth. The high frequency and the small transducer dimensions lead to a compelling image resolution.

Paper Details

Date Published:
PDF: 1 pages
Proc. SPIE 10168, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2017, 101682B; doi: 10.1117/12.2270713
Show Author Affiliations
Balthasar Fischer, XARION Laser Acoustics GmbH (Austria)
Wolfgang Rohringer, XARION Laser Acoustics GmbH (Austria)
Thomas Heine, XARION Laser Acoustics GmbH (Austria)


Published in SPIE Proceedings Vol. 10168:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2017
Jerome P. Lynch, Editor(s)

Video Presentation

Optical-air-coupled-NDT-system-with-ultra-broad-frequency-bandwidth



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