Now showing items 1-14 of 14

    • Color holographic reconstruction using multiple SLMs and LED illumination 

      Yaraş, F.; Onural, L. (S P I E - International Society for Optical Engineering, 2009)
      A color holographic reconstruction technique by using three light emitting diodes (LEDs) is described. Reflective type phase-only spatial light modulators (SLMs) are used since they are suitable for in-line phase holograms. ...
    • Holograms deep inside Silicon 

      Makey G.; Tokel O.; Turnali A.; Pavlov I.; Elahi P.; Yavuz O.; Ömer Ilday F. (OSA - The Optical Society, 2016)
      Through the Nonlinear Laser Lithography method, we demonstrate the first computer generated holograms fabricated deep inside Silicon. Fourier and Fresnel holograms are fabricated buried inside Si wafers, and a generation ...
    • Infrared digital holography applications for virtual museums and diagnostics of cultural heritage 

      Paturzo, M.; Pelagotti, A.; Geltrude, A.; Locatelli, M.; Poggi P.; Meucci, R.; Ferraro P.; Stoykova, E.; Yaraş F.; Özgür Yontem, A.; Kang H.; Onural L. (2011)
      Infrared digital holograms of different statuettes are acquired. For each object, a sequence of holograms is recorded rotating the statuette with an angular step of few degrees. The holograms of the moving objects are used ...
    • Method to enlarge the hologram viewing window using a mirror module 

      Kang H.; Ohmura, N.; Yamaguchi, T.; Yoshikawa H.; Kim, S.-C.; Kim, E.-S. (2009)
      A liquid crystal panel for a video projector is often used for holographic television. However, its pixel size and pixel number are not enough for practical holographic 3-D display. Therefore, a multipanel configuration ...
    • Multi-SLM holographic display system with planar configuration 

      Yaraş, F.; Kang, H.; Onural, L. (IEEE, 2010)
      Holographic display system that uses six phase-only spatial light modulators (SLMs) performs holographic reconstructions from the phase-hologram of a point cloud that is extracted from 3D object. The SLMs are tiled as a ...
    • Optical reconstruction of transparent objects with phase-only SLMs 

      Stoykova, E.; Yaraş F.; Yontem, A.Ö.; Kang H.; Onural L.; Hamel P.; Delacrétaz, Y.; Bergoënd I.; Arfire, C.; Depeursinge, C. (Optical Society of American (OSA), 2013)
      Three approaches for visualization of transparent micro-objects from holographic data using phase-only SLMs are described. The objects are silicon micro-lenses captured in the near infrared by means of digital holographic ...
    • An overview of the holographic display related tasks within the European 3DTV project 

      Onural L.; Ozaktas, H., M.; Stoykova, E.; Gotchev, A.; Watson J. (2006)
      A European consortium has been working since September 2004 on all video-based technical aspects of three-dimensional television. The group has structured its technical activities under five technical committees focusing ...
    • Processing of optically-captured digital holograms for three-dimensional display 

      Naughton, T.J.; Kreis, T.; Onural L.; Ferraro P.; Depeursinge, C.; Emery, Y.; Hennelly, B.M.; Kujawiñska, M. (2009)
      In digital holography, holograms are usually optically captured and then two-dimensional slices of the reconstruction volume are reconstructed by computer and displayed on a two-dimensional display. When the recording is ...
    • Quality comparison and acceleration for digital hologram generation method based on segmentation 

      Kang, H.; Yaraş, F.; Onural, L. (IEEE, 2009)
      A holographic fringe pattern generation methods is based on Fraunhofer diffraction and subsequent segmentation and approximation of the fringe pattern. Several modifications of the original algorithm are already proposed ...
    • Real-time fringe pattern generation with high quality 

      Kang, H.; Yaraş, F.; Onural, L.; Yoshikawa, H. (Optical Society of America, 2009)
      A hologram computation procedure and its GPU implementation are presented. The procedure is based on partitioning. Each segment has an approximate but simpler frequency domain representation. Quality of the results is ...
    • Real-time multiple SLM color holographic display using multiple GPU acceleration 

      Yaraş, F.; Kang, H.; Onural, L. (Optical Society of America, 2009)
      A real-time color holographic video display system computes holograms from point cloud of a rigid object by using multi-GPU system and uses three different colored LEDs for reconstruction. Experimental results are satisfactory. ...
    • Reconstruction of computer generated holograms by spatial light modulators 

      Kovachev, M.; Ilieva, R.; Onural L.; Esmer G.B.; Reyhan, T.; Benzie P.; Watson J.; Mitev, E. (Springer Verlag, 2006)
      Computer generated holograms generated by using three different numerical techniques are reconstructed optically by spatial light modulators. Liquid crystal spatial light modulators (SLM) on transmission and on reflection ...
    • Thereconstruction quality improvement of holographic stereograms via variable size segmentation 

      Şahin, E.; Onural L.; Kang H. (2010)
      As computer generated holograms becomes more common, the fast computation of holographic interference patterns in digital environment becomes a necessity. Since the computation time of holograms via Fresnel (or ...
    • Trends in development of dynamic holographic displays 

      Sainov V.; Stoykova, E.; Onural L.; Ozaktas, H., M. (2006)
      Creation of a dynamic 3-D display based on holography, in which a 3-D scene is encoded in terms of optical diffraction, transformed into the fringe patterns of the hologram that is further converted into a signal for a ...