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      • Department of Electrical and Electronics Engineering
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      Method to enlarge the hologram viewing window using a mirror module

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      Author
      Kang H.
      Ohmura, N.
      Yamaguchi, T.
      Yoshikawa H.
      Kim, S.-C.
      Kim, E.-S.
      Date
      2009
      Source Title
      Optical Engineering
      Print ISSN
      0091-3286
      Volume
      48
      Issue
      7
      Language
      English
      Type
      Article
      Item Usage Stats
      112
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      111
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      Abstract
      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 is generally used to increase the viewing window and displayed image size, and many spatial light modulators should be used in them. We propose a novel method to increase the viewing window of a holographic display system. The proposed method, which is implemented by using a mirror module and 4-f lens set, is to reconfigure the beam shape reflected by a spatial light modulator. The equipment is applied to a holographic display system, which has only a single spatial light modulator; a hologram could be displayed in a wider viewing window by the equipment than that of the conventional method. By the proposed method, the resolution of the reconfigured spatial light modulator has double resolution in the horizontal direction. Inversely, the vertical resolution is decreased. Even if the vertical resolution is decreased, a viewer could get 3-D effect because humans get more 3-D information in the horizontal direction. We have experimented using a liquid crystal on silicon (LcOS), whose resolution is 4096×2160pixels. The reconfigured resolution by the mirror module is 8192×1080pixels. From the experiments, the horizontal viewing window is almost two times wider than that without the mirror module. As a result, the hologram can be observed binocularly. © 2009 Society of Photo-Optical Instrumentation Engineers.
      Keywords
      4-f lens system
      Fresnel hologram
      holographic display
      mirror module
      viewing window
      3-D displays
      3D information
      Beam shapes
      Conventional methods
      Fresnel holograms
      Lens systems
      Liquid crystal on silicon
      Liquid-crystal panels
      Pixel size
      Spatial light modulators
      Vertical resolution
      Video projectors
      Viewing windows
      Holograms
      Light modulation
      Light modulators
      Liquid crystals
      Lithography
      Mirrors
      Pixels
      Three dimensional
      Holographic displays
      Permalink
      http://hdl.handle.net/11693/22542
      Published Version (Please cite this version)
      http://dx.doi.org/10.1117/1.3180869
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      • Department of Electrical and Electronics Engineering 3524
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