Digital Holographic Display Based on Digital Micromirror Device and Quality Enhancement of Its Reconstructed Image
基于DMD的数字全息显示及其再现像质增强

Digital Micromirror Device (DMD) is employed as spatial light modulator to construct a digital holographic display system.The factors affecting the reconstructed image quality are analyzed,and a new method is put forward to improve the optically reconstructed image quality by filtering in the frequency domain and rebuilding filtered hologram with high fringe visibility.The merit factors of signal-to-noise (SNR) and image brightness are introduced to evaluate the reconstructed image quality of original and filtered holograms.Theoretical results show that the reconstructed image quality of the filtered hologram is much better than that of the original hologram.The experimental results of optical reconstruction based on DMD holographic display system also agree well with the theoretical results.