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Optics Express

Optics Express

  • Editor: J. H. Eberly
  • Vol. 2, Iss. 13 — Jun. 22, 1998
  • pp: 531–539

Improved resolution and signal-to-noise ratio in laser-ultrasonics by SAFT processing

A. Blouin, D. Lévesque, C. Néron, D. Drolet, and J.-P. Monchalin  »View Author Affiliations

Optics Express, Vol. 2, Issue 13, pp. 531-539 (1998)

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Laser-ultrasonics is an emerging nondestructive technique using lasers for the generation and detection of ultrasound which presents numerous advantages for industrial inspection. In this paper, the problem of detection by laser-ultrasonics of small defects within a material is addressed. Experimental results obtained with laser-ultrasonics are processed using the Synthetic Aperture Focusing Technique (SAFT), yielding improved flaw detectability and spatial resolution. Experiments have been performed on an aluminum sample with a contoured back surface and two flat-bottom holes. Practical interest of coupling SAFT to laser-ultrasonics is also discussed.

© Optical Society of America

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.4290) Instrumentation, measurement, and metrology : Nondestructive testing

ToC Category:
Focus Issue: Optical methods for material inspection

Original Manuscript: March 26, 1998
Published: June 22, 1998

Alain Blouin, D. Levesque, C. Neron, Denis Drolet, and Jean-Pierre Monchalin, "Improved resolution and signal-to-noise ratio in laser-ultrasonics by SAFT processing," Opt. Express 2, 531-539 (1998)

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