title: Optical configuration in speckle shear interferometry for slope change contouring with a twofold increase in sensitivity.
abstract: We present a novel optical configuration that yields a fringe pattern that represents the slope changes of a three-dimensional object with a twofold increase in sensitivity. The method offers controllable sensitivity over a wide range. We accomplish it by modifying the in-plane displacement sensitive configuration of speckle interferometry. The detailed theory and the experimental results are presented with a brief discussion on the limiting aspects of the configuration.
authors.forename: T
authors.initials: T
authors.lastname: Santhanakrishnan
authors.forename: P K
authors.initials: PK
authors.lastname: Palanisamy
authors.forename: R S
authors.initials: RS
authors.lastname: Sirohi