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Applied Optics

Applied Optics


  • Vol. 36, Iss. 13 — May. 1, 1997
  • pp: 2940–2943

Detection of photothermal effect by laser speckle strain gauge

Ichirou Yamaguchi, Dobromir Palazov, Eisuke Natori, and Jun-ichi Kato  »View Author Affiliations

Applied Optics, Vol. 36, Issue 13, pp. 2940-2943 (1997)

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A new method for simple and sensitive detection of photothermal strain caused by laser irradiation of plastic plates has been proposed. In-plane strain of the surface is detected directly by optoelectronic detection of speckle displacements at two symmetrical positions about a probe beam. The initial bending of the plate owing to the temperature gradient along the plate thickness is measured and shows good agreement with one-dimensional calculations.

© 1997 Optical Society of America

Original Manuscript: June 4, 1996
Revised Manuscript: September 11, 1996
Published: May 1, 1997

Ichirou Yamaguchi, Dobromir Palazov, Eisuke Natori, and Jun-ichi Kato, "Detection of photothermal effect by laser speckle strain gauge," Appl. Opt. 36, 2940-2943 (1997)

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