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Optical Engineering

Method to enlarge the hologram viewing window using a mirror module
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Paper 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 4096×2160 pixels. The reconfigured resolution by the mirror module is 8192×1080 pixels. 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.

Paper Details

Date Published: 1 July 2009
PDF: 7 pages
Opt. Eng. 48(7) 075801 doi: 10.1117/1.3180869
Published in: Optical Engineering Volume 48, Issue 7
Show Author Affiliations
Hoonjong Kang, Nihon Univ. (Japan)
Naoyuki Omura, Nihon Univ. (Japan)
Takeshi Yamaguchi, Nihon Univ. (Japan)
Hiroshi Yoshikawa, Nihon Univ. (Japan)
Seung-Cheol Kim, Kwangwoon Univ. (Korea, Republic of)
Eun-Soo Kim, Kwangwoon Univ. (Korea, Republic of)

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