Vik Parthiban, Rudolph N. Kohn Jr., Jinyang Liang, and Michael F. Becker "Experimental demonstration of precise holograms using complex light modulation", Proc. SPIE 9761, Emerging Digital Micromirror Device Based Systems and Applications VIII, 97610M (15 March 2016); https://doi.org/10.1117/12.2208316

Abstract

We generated a fully complex hologram by utilizing a combination of amplitude and phase spatial light modulators. A digital micromirror device (DMD) was used to produce the amplitude profile, and a liquid crystal spatial light modulator (SLM) produced the phase profile. A band-limited 4-f imaging system imaged the DMD onto the SLM to create a fully complex modulated wavefront, which reconstructed a holographic image at the desired location. We utilized backwards diffraction calculations, error-diffusion, and amplitude beam-shaping to design a hologram with small reconstruction error.