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Proceedings Paper

Laser ultrasonics for process control: issues for implementation
Author(s): Michael J. Ehrlich; Todd W. Murray; James W. Wagner; Kevin C. Baldwin; James B. Spicer
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Paper Abstract

Laser ultrasonic techniques for in-process materials characterization show significant potential for applications where rapid, remote sensing is a requirement. While the potential is great, relatively few on-line industrial systems currently exist owing to difficulty associated with designing and implementing robust laser ultrasonic systems. Although laser-based ultrasound is becoming widely used as a laboratory tool for materials characterization, transitioning this technology into a robust industrial process control system poses several problems. Chief among these are suitable lasers for ultrasound generation, ultrasound detection, interferometer design, required signal processing, and overall system performance. This manuscript addresses each of these issues in turn, and gibes examples of industrial process control implementations where appropriate. Finally, recent advances in increasing laser based ultrasonic sensitivity are discussed.

Paper Details

Date Published: 15 November 1996
PDF: 12 pages
Proc. SPIE 2948, Nondestructive Evaluation for Process Control in Manufacturing, (15 November 1996); doi: 10.1117/12.259213
Show Author Affiliations
Michael J. Ehrlich, Johns Hopkins Univ. (United States)
Todd W. Murray, Johns Hopkins Univ. (United States)
James W. Wagner, Johns Hopkins Univ. (United States)
Kevin C. Baldwin, Johns Hopkins Univ. (United States)
James B. Spicer, Johns Hopkins Univ. (United States)


Published in SPIE Proceedings Vol. 2948:
Nondestructive Evaluation for Process Control in Manufacturing
Richard H. Bossi; Tom Moran, Editor(s)

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