Abstract: A new kind of true color rainbow holography - color coding reproduction of a 3D object - is presented. By making use of one wavelength laser to encode three Fresnel holograms in which each of the three primary colors of a 3D object is recorded by three primary color lasers, respectively, this new technique can produce a true color rainbow hologram of a 3D object with one exposure and one type of recording material; an available method to make high quality embossing masters of a true color hologram is thus provided.!
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