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Proceedings Paper

A method to increase the hologram viewing angle by the beam reconfiguration
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Paper Abstract

A liquid crystal panel is often used for holographic television. However, its pixel size and pixel number are not enough for practical holographic 3D display. Therefore, multi-panel configuration is often used to increase the viewing angle and displayed image size. However, many spatial light modulators should be used in them. In this paper, we propose a novel method to increase the viewing angle of a holographic display system. The proposed method, which is implemented by a mirror module, is to reconfigure the beam shape reflected by a spatial light modulator. In this paper, the equipment is applied to a holographic display system, which has only a single spatial light modulator and can display a hologram in wider viewing angle than that of the conventional method. By the proposed method, the resolution of the reconfigured spatial light modulator has double resolution in horizontal direction. Inversely, the vertical resolution is decreased because the human get more 3D information in horizontal direction. We have experimented using a Liquid Crystal on Silicon, whose resolution is 4,096 x 2,160 pixels. And the reconfigured resolution by the mirror module is 8,192 x 1,080 pixels. From the experimental results, the horizontal viewing angle is almost two times wider than that of the conventional method without the mirror module. We have achieved that the hologram can be observed binocularly.

Paper Details

Date Published: 25 January 2008
PDF: 9 pages
Proc. SPIE 6912, Practical Holography XXII: Materials and Applications, 69120O (25 January 2008); doi: 10.1117/12.764503
Show Author Affiliations
Naoyuki Ohmura, Nihon Univ. (Japan)
Hoonjong Kang, Nihon Univ. (Japan)
Takeshi Yamaguchi, Nihon Univ. (Japan)
Hiroshi Yoshikawa, Nihon Univ. (Japan)

Published in SPIE Proceedings Vol. 6912:
Practical Holography XXII: Materials and Applications
Hans I. Bjelkhagen; Raymond K. Kostuk, Editor(s)

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