Listar por tema "Diffusers (optical)"

Mostrando ítems 1-4 de 4

    • Diffuser in Fractional Fourier Optics 

      Patiño Vanegas, Alberto; Durand, P.E.; Pellat-Finet P.; Torres R. (OSA - The Optical Society, 2016)
      We propose a method for calculating a bandlimited diffuser with smooth spectrum in the Fresnel domain without any 2p phase ambiguities using the fractional Fourier transform. Such diffusers are necessary to avoid problems ...

    • HoloEasy, a web application for computer generated holograms 

      Patiño Vanegas, Alberto; Diaz-Pacheco L.L.; Patiño-Vanegas J.J.; Martínez-Santos J.C. (Springer Verlag, 2018)
      If the appropriate phase and/or amplitude profile is placed on a Diffractive Optical Element (DOE) it can practically generate an image of an object (hologram) by diffraction of the light. The problem of generating computer ...

    • Speckle free optical watermarking based on pseudo-random phase encoding 

      Patino A.; Altamar Mercado, Hernando; Martínez-Santos, Juan Carlos (Institute of Electrical and Electronics Engineers Inc., 2016)
      Watermarking is a process of embedding copiright information into an image to verify the ownership without any kind of corruption. In optical applications, the usage of diffusers is required to obtain a homogeneously ...

    • α-bandlimited diffuser in fractional Fourier optics 

      Patiño Vanegas, Alberto; Durand, P.E.; Torres R.; Pellat-Finet P. (SPIE, 2016)
      We propose a method for calculating appropriate α-band limited diffusers using the fractional Fourier transform. In order to do this, we implement a method for performing a numerical interpolation in the fractional Fourier ...

      Universidad Tecnológica de Bolívar - 2017 Institución de Educación Superior sujeta a inspección y vigilancia por el Ministerio de Educación Nacional. Resolución No 961 del 26 de octubre de 1970 a través de la cual la Gobernación de Bolívar otorga la Personería Jurídica a la Universidad Tecnológica de Bolívar.