3-D DISPLAY USING COMPUTER-GENERATED BINARY HOLOGRAMS

概要

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We have been making researches on 3-D 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).^1 We use an image setter with a resolution of 5080 dots per inch.It is possible to reconstruct CGHs with lightemitting diodes(LEDs)or light bulbs which have small emitting points.^<:2, 3, 4>l: As the resolution of the image setter is not so high, it is better to use a spherical wave as a reference beam. We considered the recordable points objects are restricted by the low resolution, and proposed the multiplex type hologram to reduce the number of point objects recorded in the unit area of the CGH.^5 We proposed a method to make computer-generated color hologram which could reconstruct color point light sources, by combining RGB color filters with the stripe CGHs corresponding to each color.^6 We considered two kinds of gradation method on our binary CGHs. In this paper, we propose a multiple reconstruction method for improving the narrow viewing field.
1999-01-22