Color electroholography by three colored
reference lights simultaneously incident upon
one hologram panel
Tomoyoshi Ito
Japan Science and Technology Agency / Department of Medical System Engineering, Chiba University,
1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
itot@faculty.chiba-u.jp
Koji Okano
Department of Electronics and Mechanical Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku,
Chiba 263-8522, Japan
Abstract: A color-reconstruction method for electroholography is proposed
in which three colored reference lights, namely, red, green, and blue light-
emitting diodes, simultaneously illuminate one hologram plane. Three
colored light-emitting diodes are placed at the apexes of a small right-
angled triangle. Inasmuch as there is a small gap between consecutive light
axes, three colored diffraction lights can be piled up at the place where a
three-dimensional image is focused. In our experiment we used a high-
resolution liquid-crystal display panel as a spatial light modulator with a
pixel pitch of 10 µm and a resolution of 1400×1050. The system clearly
reconstructed a colored moving image including a mixture of colors, for
example, cyan, yellow, magenta, and white.
2004 Optical Society of America
OCIS codes: (090.1760) Computer holography; (090.2870) Holographic display.
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