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Proceedings Paper

Cylindrical large computer-generated holograms and hidden-point removal process
Author(s): Yoshinori Kajiki; Hiroaki Ueda; Kazuyuki Tanaka; Hideki Okamoto; Eiji Shimizu
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Paper Abstract

We have been making researches on 3D displays using computer-generated holograms (CGHs). Our CGHs are binary Fresnel holograms that reconstruct point light sources and are recorded by using high resolution laser printers (image setters). The image setters have the resolution of 3600 or 5080 dots per inch (7.1 or 5.0 micron dot width). The resolution is lower than that of photo reduction, but it has wide drawing area, and it is not expensive to draw large CGH patterns on a high contrast film. In this paper, we present an approach to making cylindrical large CGHs and hidden-point removal process. The number of reconstructible point light sources is considered to be restricted due to the low resolution of the printer. To improve this restriction and to make larger displays, we propose a method arranging plural CGHs cylindrically that reconstruct divided objects. For improving the depth of the objects reconstructed from the CGHs, we consider it is necessary to apply hidden-point removal process to our CGH calculation. Whether a certain point object is visible or not from a point of view depends on the existence of the interference fringes on the CGH plane.

Paper Details

Date Published: 25 March 1996
PDF: 7 pages
Proc. SPIE 2652, Practical Holography X, (25 March 1996); doi: 10.1117/12.236083
Show Author Affiliations
Yoshinori Kajiki, Koshien Univ. (Japan)
Hiroaki Ueda, Labs. of Image Information Science and Technology (Japan)
Kazuyuki Tanaka, Labs. of Image Information Science and Technology (Japan)
Hideki Okamoto, Labs. of Image Information Science and Technology (Japan)
Eiji Shimizu, Osaka City Univ. (Japan)

Published in SPIE Proceedings Vol. 2652:
Practical Holography X
Stephen A. Benton, Editor(s)

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