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Color electroholography by three colored reference lights simultaneously incident upon one hologram panel

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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

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Figures (9)

Fig. 1.
Fig. 1. Color electroholography setup: three hologram panels combined with three colored reference lights.
Fig. 2.
Fig. 2. Color electroholography by time-division multiplexing with one hologram panel.
Fig. 3.
Fig. 3. Color electroholography setup for our proposed method. The reference light system is shown at the left.
Fig. 4.
Fig. 4. (a) Color reconstruction of the area where a reconstructed image is focused and (b) areas of a three-dimensional object redrawn according to RGB color components.
Fig. 5.
Fig. 5. (a) Cube with three colors, (b) separation of the color components, and (c) reconstruction by RGB reference lights.
Fig. 6.
Fig. 6. Experimental setup for the color-reconstruction method presented here.
Fig. 7.
Fig. 7. Colored die.
Fig. 8.
Fig. 8. Mixed-color characters.
Fig. 9.
Fig. 9. (656 KB) Color reconstruction from complicated three-dimensional graphics.
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