Envíos recientes

  • Speckle interferometric technique to assess soap films 

    Ángel Toro, Luciano; Bolognini, Néstor Alberto; Tebaldi, Myrian Cristina; Trivi, Marcelo Ricardo (Elsevier B.V., 2003-10-17)
    An speckle interferometric technique to monitor the thinning process of vertical soap film before the film rupture is presented -- The interferometric arrangement consists in a double aperture pupil optical system which ...
  • Speckle photography with different pupils in a multiple-exposure scheme 

    Ángel Toro, Luciano; Bolognini, Néstor Alberto; Tebaldi, Myrian Cristina; Trivi, Marcelo Ricardo (Optical Society of America, 2000-01-01)
    The use of different multiple-aperture pupils for recording each image in speckle photography is proposed -- The introduction of suitable spatial frequency carriers, by internally modulating imaged speckles, allows one to ...
  • Obtención de estructuras de relieve en materiales de registro de haluros de plata 

    Velásquez Prieto, Daniel; Giraldo Castaño, Lady Marcela (Sedoptica; Grupo de Investigación de Óptica Aplicada; Escuela de Ciencias y Humanidades, 2013-09-19)
    Diffraction transmission gratings were recorded in AGFA-8E75 film, chemically treated under processes with D-19 + potassium ferrocyanide and a chemical processing technique proposed for PE-2 film to obtain embossed stripes. ...
  • Shack - Hartmann spot dislocation map determination using an optical flow method 

    Vargas, Javier; Restrepo Gómez, René; Belenguer, Tomás (OSA; Escuela de Ciencias y Humanidades, 2014-01-14)
    We present a robust, dense, and accurate Shack-Hartmann spot dislocation map determination method based on a regularized optical flow algorithm that does not require obtaining the spot centroids. The method is capable to ...
  • Improvement of the signal-to-noise ratio in digital holography 

    Velásquez-Prieto, Daniel; Herrera Ramírez, Jorge Alexis; García Sucerquia, Jorge Iván (Sociedad Mexicana de Física; Grupo de Investigación de Óptica Aplicada; Escuela de Ciencias y Humanidades, 2005-02)
    A fundamental problem in optical and digital holography is the presence of speckle noise in the reconstruction process, which essentially diminishes the signal to noise ratio (SNR). For many applications, that reduction ...

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