Effective information processing method to produce a computer-generated hologram based on a spatial light modulator.

In this paper, we propose an effective information processing method to produce a computer-generated hologram (CGH) based on a spatial light modulator (SLM). The method generates CGHs according to the property of the field of view (FOV), which, to the best of our knowledge, has never been proposed before. The CGH is composed of essential interference patterns (EIPs). Each EIP records the information of different object points. The resolution of the EIP is reduced. In the reconstructed process, the boundaries of the diffraction light of each EIP and FOV of the reconstructed image are parallel with each other. Compared with the conventional method, the experiments here demonstrate that the effective reconstructed information in the FOV has no change, while the waste reconstructed information out of the FOV is decreased at any viewing distance. The CGH can reconstruct an image with high quality. Meanwhile, the computation burden of calculating the CGH is reduced with our method.