Investigation on Lippmann photographs: materials, processes, and colorrendition,

摘要

Abstract: Reality of holographic image can be effectively improved by multicolor reconstruction. This fact is applicable to real-time 3D display by computer generated hologram (CGH). However, generating CGH for multicolor imaging in real-time is quite difficult because a CGH contains huge amount of information and it is multiplexed by the number of primary colors for multicolor imaging. Moreover, an optical system for multicolor reconstruction tends to be rather complicated. This paper presents a new method to reconstruct 3D multicolor images from CGH. In this method, three sub-holograms reconstructing primary color images are sampled respectively to reduce the amount of computation and realize the simple optical system. Fringe patterns are displayed on only one spatial light modulator and color crosstalk images are eliminated with color filtering system to ensure that each sub-hologram is illuminated only with the light of the appropriate color. As the experimental results, multicolor images from CGH using this method and the improvement of calculation time to generated multicolor images are shown.!22