title: Transient deformation measurement with electronic speckle pattern interferometry by use of a holographic optical element for spatial phase stepping.
abstract: We have used a computer-generated holographic optical element (HOE) with electronic speckle pattern interferometry to calculate the interference phase corresponding to the deformation of a test object from a single TV frame. The HOE is a modified crossed phase grating that introduces a known phase change between the +/-1 diffracted orders, without being translated. The progressive propagation of transient mechanical waves was measured with an rms precision of 2pi/30.
authors.affiliation: Centro de Investigaciones en Optica, Apartado Postal 1-948, Leon, Guanajuato, Mexico.
authors.forename: B
authors.initials: B
authors.lastname: Barrientos García
authors.forename: A J
authors.initials: AJ
authors.lastname: Moore
authors.forename: C
authors.initials: C
authors.lastname: Pérez-López
authors.forename: L
authors.initials: L
authors.lastname: Wang
authors.forename: T
authors.initials: T
authors.lastname: Tschudi