title: Correlation measurements using clipped laser speckle.
abstract: Clipped laser speckle is used to measure the correlation of time-varying laser speckle. As with standard intensity correlation, clipped speckle is correlated to determine the magnitude of the correlation coefficient. The simple nature of clipped speckle permits high-speed measurements of correlation and velocity. A closed form approximation to the clipped correlation function valid for arbitrary clipping thresholds is presented. The approximation is used to make correlation measurements on speckle from a rotating diffuser using a 2-D random access detector array.
authors.affiliation: University of Rochester, Institute of Optics, Rochester, New York 14627, USA.
authors.forename: J
authors.initials: J
authors.lastname: Marron
authors.forename: G M
authors.initials: GM
authors.lastname: Morris