title: From speckle pattern photography to digital holographic interferometry [Invited].
abstract: Speckles are inherently an interference phenomenon produced when an optically rough surface or a turbulent medium introduces some degree of randomness to a reflected or a transmitted electromagnetic field. Speckles are often nuisance in coherent image formation. Speckle patterns are however a useful tool for displacement and deformation as well as vibration and stress analysis. The development of speckle photography to speckle interferometry and digital holographic interferometry is described in this paper.
authors.affiliation: Institut fuer Technische Optik, Universität Stuttgart, Pfaffenwaldring 9, Stuttgart 70569, Germany. h.tiziani@bluewin.ch
authors.forename: Hans J
authors.initials: HJ
authors.lastname: Tiziani
authors.forename: Giancarlo
authors.initials: G
authors.lastname: Pedrini