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  • Contrast inversion in the Lau phenomena implemented with a photorefractive grating 

    Ángel Toro, Luciano; Tebaldi, Myrian Cristina; Bolognini, Néstor Alberto (SPIE, 1999-07-06)
    It was implemented the Lau effect with a grating registered in a BSO crystal. Two different arrangement were analyzed. In both cases, it is possible to control the visibility and to produce the contrast inversion of fringes, ...
  • Three-dimensional contouring with digital holography 

    Velásquez-Prieto, Daniel; García Sucerquia, Jorge Iván (Sociedad Colombiana De Física; Grupo de Investigación de Óptica Aplicada; Escuela de Ciencias y Humanidades, 2005-04-28)
    We report on a technique to determine the 3D contour of objects with dimensions of at least four orders of magnitude larger than the illumination optical wavelength. Our proposal is based on the numerical reconstruction ...