Multiphase computer-generated holograms for full-color image generation

摘要

Multi-phase and binary-phase computer-generated holograms were designed and demonstrated for full-color image generation. To optimize a phase profile of the hologram that achieves each color image, we employed a simulated annealing method. The designed binary phase hologram had the diffraction efficiency of 33.23% and the reconstruction error of 0.367x10~(-2). And eight phase hologram had the diffraction efficiency of 67.92% and the reconstruction error of 0.273x10~(2). The designed BPH was fabricated by micro photolithographic technique with a minimum pixel width of 5μm. And then it was reconstructed using by two Ar-ion lasers (488nm, 514.5nm) and a He-Ne laser (632.8nm). In addition, the color dispersion characteristics of the fabricated grating and scaling problem of the reconstructed image were discussed.