Optimized dual spatial light modulators holographic display based on wavefront frequency decomposition

Abstract

An optimized method of dual spatial light modulators holographic display is proposed in accordance with wavefront frequency decomposition. The wavefront frequency decomposition is conducted on the object light wave to generate two frequency images. The low frequency image is determined by amplitude computer-generated hologram (CGH) and then loaded on an amplitude spatial light modulator (SLM). The high frequency image is decided by phase CGH and loaded on a phase SLM. The mentioned two sub-holograms are reconstructed at the identical location and integrated superposed as the final result, so the pixel-to-pixel alignment between two spatial light modulators is not required to be considered. Moreover, the numerical analysis of image evaluation functions demonstrates that the proposed method is valid. As opposed to the conventional methods, the amplitude and phase information are enhanced. The quality of reconstructed images is optimized effectively (the peak signal-to-noise ratio by 3%, the image structure similarity by 3%, the speckle contrast by 30%, and the Michelson contrast by 15%). Optical experimental results show that the reconstruction details are more vivid.