title: Detection of photothermal effect by laser speckle strain gauge.
abstract: 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.
authors.forename: I
authors.initials: I
authors.lastname: Yamaguchi
authors.forename: D
authors.initials: D
authors.lastname: Palazov
authors.forename: E
authors.initials: E
authors.lastname: Natori
authors.forename: J
authors.initials: J
authors.lastname: Kato