• A computational method to acquired hogel images used in full parallax holographic stereograms 

    Sánchez, A.M.; Velásquez, D. (OSA - The Optical Society, 2016-01-01)
    Holographic stereogram displays require 2D image sequences with a distribution of multiple perspectives of the object. This paper propose a computational method to generate the required images to record full parallax ...
  • An integrated system for virtual scene rendering, stereo reconstruction and accuracy estimation 

    Marichal-Hernández, J.G.; Pérez Nava, F.; Rosa, F.; Restrepo, R.; Rodríguez-Ramos, J.M. (2006-01-01)
    This article depicts an integrated system capable of generating virtual stereo scenes, reconstructing a three-dimensional map of distances, and calculating the accuracy of the results obtained. This tool is particularly ...
  • Analysis of a developed analog trilateration system of impulsive sounds 

    López R., J.M.; Marulanda B., J.I. (SPIE-INT SOC OPTICAL ENGINEERING, 2014-01-01)
    A characterization study is made from a trilateration system for impulsive sounds, in which theoretical analysis and experimental results are presented. This system uses an analog trilateration method, avoiding to implement ...
  • Analysis of chemical processes for the synthesis of magnetite for biomedical applications 

    Baena, J.; Marulanda, J.I. (IOP PUBLISHING LTD, 2011-01-01)
    This article demonstrates the evaluation of wet chemical routes to produce magnetic nanoparticles of iron oxide and surface chemistry characterization by infrared spectroscopy (IR). Its potential use in biomedicine as ...
  • Analysis of optomechanicalMethod for materials selection in optical design 

    Cano-Barrera, C.; Restrepo, R.; Zuluaga-Ramírez, P. (OSA - The Optical Society, 2016-01-01)
    We present a technique to determine the wavefront error and polarization changes introduced by a loaded optical material based on its optical, thermal and mechanical properties through an integrated optomechanical simulation ...
  • 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 ...
  • Analysis of vibrations in a plate using interferometric methods 

    Rueda, E.; Angel, L.; Velasquez, D. (SPIE-INT SOC OPTICAL ENGINEERING, 2004-01-01)
    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 ...
  • Application software for teaching the polarization ellipse 

    Cano, Camilo; Echeverri-Chacon, Santiago; Cuartas-Velez, Carlos; Angel, Luciano; Restrepo, Rene (Sociedad Espanola de Optica, 2018-09-01)
    This paper describes the development of a computational application that calculates the configuration of a polarization state generator, according to the parameters of a desired polarization ellipse. The most general way ...
  • Applications of spatial light modulators in speckle interferometry 

    Bodendorfer, T.; Restrepo, R.; Belenguer, T.; Koch, A.W. (SPIE-INT SOC OPTICAL ENGINEERING, 2012-01-01)
    High resolution spatial light modulators (SLM) have been used in many different ways during the last years. Regarding speckle interferometry, different applications can be realized by integrating SLMs in interferometric ...
  • Chromatic aberration compensation in numerical reconstruction of digital holograms by Fresnel-Bluestein propagation 

    Hincapie D.; Velasquez D.; Garcia-Sucerquia J. (OSA - The Optical Society, 2017-12-15)
    In this Letter, we present a method for chromatic compensation in numerical reconstruction of digitally recorded holograms based on Fresnel-Bluestein propagation. The proposed technique is applied to correct the chromatic ...
  • Computer graphic method for direct correspondence image acquisition used in full parallax holographic stereograms 

    Madrid Sanchez, Alejandro; Velasquez Prieto, Daniel (SPIE-INT SOC OPTICAL ENGINEERING, 2016-01-01)
    The holoprinter technology based on holographic stereograms has generated a fast development in holographic display applications by the holographic recording of a 2D image sequence with information of a 3D scene, which ...
  • Consumed fatigue life assessment of composite material structures by optical surface roughness inspection 

    Zuluaga, P.; Frövel, M.; Restrepo, R.; Trallero, R.; Atienza, R.; Pintado, J.M.; Belenguer, T.; Salazar, F. (Trans Tech Publications Ltd., 2013-01-01)
    A strong knowledge of the fatigue state of highly advanced carbon fiber reinforced polymer composite (CFRP) structures is essential to predict the residual life and optimize intervals of structural inspection, repairs, ...
  • 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, ...
  • 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 ...
  • DC term filtering techniques in digital holography 

    Garcia-Sucerquia, J.; Ramirez, J.A.H.; Prieto, D.V. (SPIE-INT SOC OPTICAL ENGINEERING, 2004-01-01)
    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 ...
  • Design of a control system for interferometric fringe stabilization system with remote access 

    Espitia-Gómez, Javier; Ángel Toro, Luciano; Velásquez Prieto, Daniel (SPIE; Grupo de Investigación de Óptica Aplicada; Escuela de Ciencias y Humanidades, 2013-11-18)
    Stability in a fringe pattern is a necessary condition in interferometric processes, such as holography, and not always is enough the use of passive stabilization systems, like holographic tables, in particular, when ...
  • Design of a control system for interferometric fringe stabilization system with remote access 

    Espitia-Gomez, Javier; Angel-Toro, Luciano; Velasquez, Daniel (SPIE-INT SOC OPTICAL ENGINEERING, 2013-01-01)
    Stability in a fringe pattern is a necessary condition in interferometric processes, such as holography, and not always is enough the use of passive stabilization systems, like holographic tables, in particular, when ...
  • Design of a linear in wavenumber spectrometer 

    Ruiz-Lopera S.; Restrepo R. (OSA - The Optical Society, 2018-01-01)
    We describe the optical design of a linear in wavenumber spectrometer that combines a grating and a prism. OpticStudio software was used to validate the performance of the design. High lineartiy in k-space was achived. © ...
  • Design, development, and implementation of a low-cost full-parallax holoprinter 

    Madrid S, A.; D. Velásquez (SPIE-INT SOC OPTICAL ENGINEERING, 2018-02-19)
    Synthetic holograms have achieved a great impact in a variety of fields like architecture, advertising, army and art, and have proven their importance in advancing the holographic displays as visual communication media. ...