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Proceedings Paper

Combination enlargement method of viewing zone for computer-generated holography
Author(s): Tomoyuki Mishina; Mitsuho Yamada; Ichiro Yuyama; Fumio Okano
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Paper Abstract

We have developed a new system based on computer-generated holography using a hologram plane with a sampling structure like a liquid crystal display. This system can eliminate beams from conjugate images and enlarge the viewing zone, which are achieved by combining the following two methods. The first method enlarges the viewing zone by using higher- order diffraction beams generated because of the sampling structure of the hologram plane. If the angle between the object beam and the reference beam is larger than the angle determined by the sampling period on the hologram plane, aliasing occurs in the fringe patterns. In this method, the viewing zone is enlarged by using a spatial filter to extract the object beams from the higher-order diffraction beams generated from aliasing and then combining them. The second method is a modification of the single-sideband method that is known to eliminate the conjugate beams and to restrict the viewing zone to a narrow range. The modified method improves this restriction by dividing the range of the object beams and reproducing each of them. This paper presents the developed system, and the results of experiments that confirmed the effectiveness of this system in enlarging the viewing zone.

Paper Details

Date Published: 17 March 2000
PDF: 9 pages
Proc. SPIE 3956, Practical Holography XIV and Holographic Materials VI, (17 March 2000); doi: 10.1117/12.379993
Show Author Affiliations
Tomoyuki Mishina, NHK Science and Technical Research Labs. (Japan)
Mitsuho Yamada, NHK Science and Technical Research Labs. (Japan)
Ichiro Yuyama, NHK Science and Technical Research Labs. (Japan)
Fumio Okano, NHK Science and Technical Research Labs. (Japan)


Published in SPIE Proceedings Vol. 3956:
Practical Holography XIV and Holographic Materials VI
Sylvia H. Stevenson; Stephen A. Benton; T. John Trout; Sylvia H. Stevenson; T. John Trout, Editor(s)

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