Cylindrical large computer-generated holograms and hidden-point removal process

Yoshinori Kajiki; Hiroaki Ueda; Kazuyuki Tanaka; Hideki Okamoto; Eiji Shimizu

doi:10.1117/12.236083

25 March 1996 Cylindrical large computer-generated holograms and hidden-point removal process

Yoshinori Kajiki, Hiroaki Ueda, Kazuyuki Tanaka, Hideki Okamoto, Eiji Shimizu

Proceedings Volume 2652, Practical Holography X; (1996) https://doi.org/10.1117/12.236083
Event: Electronic Imaging: Science and Technology, 1996, San Jose, CA, United States

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.

Citation Download Citation

Yoshinori Kajiki, Hiroaki Ueda, Kazuyuki Tanaka, Hideki Okamoto, and Eiji Shimizu "Cylindrical large computer-generated holograms and hidden-point removal process", Proc. SPIE 2652, Practical Holography X, (25 March 1996); https://doi.org/10.1117/12.236083

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