Holographic visualization of laser-generated ultrasound for the detection and description of subsurface flaws

Klaus-Juergen Pohl; Horst-Artur Crostack; E. H. Meyer

doi:10.1117/12.140806

15 February 1993 Holographic visualization of laser-generated ultrasound for the detection and description of subsurface flaws

Klaus-Juergen Pohl, Horst-Artur Crostack, E. H. Meyer

Author Affiliations +

Proceedings Volume 1756, Interferometry: Applications; (1993) https://doi.org/10.1117/12.140806
Event: San Diego '92, 1992, San Diego, CA, United States

Abstract

A special technique has been developed, enabling large area and contactless ultrasonic inspection of components. Ultrasonic Rayleighwaves are excited by proper laser irradiation of the component surface to be tested. The interaction of the propagating Rayleighwaves with near-surface flaws is visualized within the holographic soundfield picture taken from the insonicated part of the component. Thus, flaws as e.g. bonding flaws and cracks can be detected and described as concerns their shape and size.

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Klaus-Juergen Pohl, Horst-Artur Crostack, and E. H. Meyer "Holographic visualization of laser-generated ultrasound for the detection and description of subsurface flaws", Proc. SPIE 1756, Interferometry: Applications, (15 February 1993); https://doi.org/10.1117/12.140806

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