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Large-scale full-color computer-generated display holograms created by stacking transferred volume holograms

A novel technique is presented for full-color reconstruction of large-scale computer-generated holograms (CGHs). In this method, three printed CGHs are transferred to three volume CGHs with the wavelength corresponding to RGB colors, and then stacked to superimpose the RGB images. This CGH is not only portable but also the image is sharp and vivid as compared with that by RGB color-filters. A little position shift, caused in the reconstructed color images because of aberration by the thick glass substrate, can be compensated in calculation of the original CGHs. However, fabricated hologram was about 5 cm in the size so far, because it is difficult to create larger CGHs. In this paper, we also present techniques to create large stacked full-color volume CGHs by using scanning-copy. The fabricated full-color CGHs are demonstrated to verify the techniques.