Envíos recientes

  • Analysis of vibrations in a plate using interferometric methods 

    Ángel-Toro, Luciano; Prieto, Daniel Velasquez; Rueda Muñóz, Edgar Alberto (SPIE; Grupo de Investigación de Óptica Aplicada; Escuela de Ingeniería, 2004-10-21)
    In this work some frequencies and modes of vibration of a thin plate were determined using interferometric methods like: real-time holographic interferometry, time-average holographic interferometry, digital speckle pattern ...
  • Double aperture speckle method using a BSO crystal for in plane displacement 

    Trivi, Marcelo Ricardo; Tebaldi, Myrian Cristina; Bolognini, Néstor Alberto; Ángel Toro, Luciano (SPIE, 1999-07-06)
    The possibility of using a BSO crystal as a recording medium of specklegrams with carrying frequency fringes, to storage multiple interferograms, for uniform in-plane displacements, is presented. Experimental results are ...
  • DC term filtering techniques in digital holography 

    Velásquez-Prieto, Daniel; García Sucerquia, Jorge Iván; Herrera Ramírez, Jorge Alexis (SPIE; Grupo de Investigación de Óptica Aplicada; Escuela de Ingeniería, 2004-10-21)
    In numerical hologram reconstruction like in optical holography, there exist different diffraction orders, which many times produce difficulties for the image visualizations. In numerical reconstruction, the filtering of ...
  • 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, ...
  • Speckle photography through different multiaperture pupils 

    Ángel Toro, Luciano; Tebaldi, Myrian Cristina; Bolognini, Néstor Alberto; Trivi, Marcelo Ricardo (SPIE/ 18th Congress of the International Commission for Optics, 1999-07-19)
    An image multiplexing method based on the internal modulation of speckle grains by employing different multiple aperture pupils for recording is proposed. The interferometric fringes profile and visibility in the Fourier ...

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