title: Electronic speckle pattern interferometry using vortex beams.
abstract: We show that it is possible to perform electronic speckle pattern interferometry (ESPI) using, for the first time to our knowledge, vortex beams as the reference beam. The technique we propose is easy to implement, and the advantages obtained are, among others, environmental stability, lower processing time, and the possibility to switch between traditional ESPI and spiral ESPI. The experimental results clearly show the advantages of using the proposed technique for deformation studies of complex structures.
authors.affiliation: Laboratorio de Instrumentación Espacial–LINES, Instituto Nacional de Técnica Aeroespacial–INTA, Torrejón de Ardoz (Madrid) 28850, Spain. restrepogr@inta.es
authors.forename: René
authors.initials: R
authors.lastname: Restrepo
authors.forename: Néstor
authors.initials: N
authors.lastname: Uribe-Patarroyo
authors.forename: Tomás
authors.initials: T
authors.lastname: Belenguer