Now showing items 1-15 of 15

    • A aurvey of signal processing problems and tools in holographic three-dimensional television 

      Onural, L.; Gotchev, A.; Özaktaş, Haldun M.; Stoykova, E. (Institute of Electrical and Electronics Engineers, 2007)
      Diffraction and holography are fertile areas for application of signal theory and processing. Recent work on 3DTV displays has posed particularly challenging signal processing problems. Various procedures to compute ...
    • Computation of holographic patterns between tilted planes 

      Esmer, Gökhan Bora; Onural, Levent (SPIE - International Society for Optical Engineering, 2006-05)
      Computation of the diffraction pattern that gives the desired reconstruction of an object upon proper illumination is an important process in computer generated holography. A fast computational method, based on the plane ...
    • Design of a 360-degree holographic 3D video display using commonly available display panels and a paraboloid mirror 

      Onural, Levent (SPIE, 2017)
      Even barely acceptable quality holographic 3D video displays require hundreds of mega pixels with a pixel size in the order of a fraction of a micrometer, when conventional flat panel SLM arrangement is used. Smaller pixel ...
    • Detection of Calcium-induced morphological changes on RBCs by digital holographic microscopy and blinking optical tweezers 

      Rad, V. F.; Tavakkoli, R.; Moradi, Ali-Reza; Anand, A.; Javidi, B. (IEEE, 2016)
      Ca+2 level in the circulating red blood cells (RBCs) takes part not only in controlling biophysical properties, but also affects the membrane composition, and its morphological and rheological properties. Excessive ...
    • Diffraction and holography from a signal processing perspective 

      Onural, Levent; Özaktaş, Haldun M. (SPIE, 2006)
      The fact that plane waves are solutions of the Helmholtz equation in free space allows us to write the exact solution to the diffraction problem as a superposition of plane waves. The solution of other related problems can ...
    • Feature issue of digital holography and 3D imaging (DH) introduction 

      Hayasaki, Y.; Zhou, C.; Popescu, G.; Onural, Levent (Optical Society of America (OSA), 2014-07)
      The OSA Topical Meeting "Digital Holography and 3D Imaging (DH)," was held in Seattle, Washington, July 13-17, 2014. Feature issues based on the DH meeting series have been released by Applied Optics (AO) since 2007. This ...
    • Microsphere-Assisted Super-Resolved Mirau Digital Holographic Microscopy for Cell Identification 

      Aakhte, M.; Abbasian, V.; Akhlaghi, E. A.; Moradi, A. R.; Anand, A.; Javidi, B. (OSA - The Optical Society, 2017)
      In this paper, we use a glass microsphere incorporated into a digital holographic microscope to increase the effective resolution of the system, aiming at precise cell identification. A Mirau interferometric objective is ...
    • A new approach to holographic video imaging: principles and simulations 

      Onural, Levent; Bozdağı, Gözde; Atalar, Abdullah (SPIE, 1992)
      As the importance of 3-dimensional information displays in many fields increases, more attention is given to holographic displays. Different kinds of holographic displays are reported in the literature, but the resolution ...
    • New high-resolution display device for holographic three-dimensional video: principles and simulations 

      Onural, L.; Bozdağı, G.; Atalar, Abdullah (SPIE, 1994)
      A new acousto-optical holographic display device, which is expected to solve the display resolution and refresh problems that are common to available holographic displays, is proposed. The device is based on the ...
    • A novel approach to 3-dimensional holographic television display: principles and simulations 

      Bozdağı, Gözde; Onural, Levent; Atalar, Abdullah (IEEE, 1992-03)
      The authors present a new technique for the display end of a holographic three-dimensional television system and describe the computer simulations. The technique is based on the reproduction of the desired pattern, in this ...
    • An optical microcantilever with integrated grating coupler 

      Olcum, Selim; Karademir, Ertuğrul; Taş. Vahdettin; Akça, İmran; Kocabaş, Aşkın; Atalar, Abdullah; Aydınlı, Aydınlı (IEEE, 2009-06)
      In this paper, we have fabricated an optical cantilever with an integrated grating coupler. We have used an inexpensive and repeatable method for integrating the grating to the silicon cantilever with a microfabrication ...
    • Optimal image restoration with the fractional Fourier transform 

      Kutay, M. A.; Özaktaş, Haldun M. (OSA - The Optical Society, 1998-04)
      The classical Wiener filter, which can be implemented in O(N log N) time, is suited best for space-invariant degradation models and space-invariant signal and noise characteristics. For space-varying degradations and ...
    • An overview of research in 3DTV 

      Onural, Levent (IEEE, 2007)
      3DTV is regarded by the experts and the general public as the next major step in video technologies. The ghost-like images of remote persons or objects are already depicted in many futuristic movies; both entertainment ...
    • Signal processing issues in diffraction and holographic 3DTV 

      Onural, L.; Özaktaş, Haldun M. (Elsevier BV, 2007)
      Image capture and image display will most likely be decoupled in future 3DTV systems. Due to the need to convert abstract representations of 3D images to display driver signals, and to explicitly consider optical diffraction ...
    • Trends in development of dynamic holographic displays 

      Sainov, V. C.; Stoykova, E. V.; Onural, Levent; Özaktaş, H. M. (SPIE, 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 ...