Measurement of out-of-plane deformation by combination of speckle photography and speckle shearing interferometry
Abstract:We measure the derivative of out-of-plane deformation in presence of large in-plane rigid body displacement (RBD) by a combination of Electronic Speckle-Shearing Pattern Interferometry (ESSPI) and speckle photography. We use digital speckle photography in order to compensate for the in-plane RBD and eliminate any decorrelation effects. ESSPI techniques are then applied to the compensated speckle images to obtain the derivative of the out-of-plane deformation. The method is tested on an aluminum plate subjected to simultaneous out-of-plane deformation and large in-plane RBD. The results indicate that the proposed method preserves the fringe contrast observed in ESSPI.
Document Type: Research Article
Affiliations: 1: Centro de Investigaciones en Óptica, AC, Apdo 1-948, CP 37150, León, Gto, México 2: Facultad de Ingeniería Mecánica, Eléctrica y Electrónica, Universidad de Guanajuato, CP 36730 3: Centro de Neurociencias de Cuba, AP 6412, CP 10600, La Habana, Cuba 4: Laboratory of Biomedical Physics, B-2020 Antwerp, Belgium
Publication date: September 1, 2004