title: Complex Fresnel hologram display using a single SLM.
abstract: We propose a novel optical method to display a complex Fresnel hologram using a single spatial light modulator (SLM). The method consists of a standard coherent image processing system with a sinusoidal grating at the Fourier plane. Two or three position-shifted amplitude holograms displayed at the input plane of the processing system can be coupled via the grating and will be precisely overlapped at the system's output plane. As a result, we can synthesize a complex hologram that is free of the twin image and the zero-order light using a single SLM. Because the twin image is not removed via filtering, the full bandwidth of the SLM can be utilized for displaying on-axis holograms. In addition, the degree of freedom of the synthesized complex hologram display can be extended by involving more than three amplitude holograms.
authors.affiliation: Department of Photonics, Feng Chia University, No. 100 Wenhwa Rd., Taichung 407, Taiwan. jpliu@fcu.edu.tw
authors.forename: Jung-Ping
authors.initials: JP
authors.lastname: Liu
authors.forename: Wang-Yu
authors.initials: WY
authors.lastname: Hsieh
authors.forename: Ting-Chung
authors.initials: TC
authors.lastname: Poon
authors.forename: Peter
authors.initials: P
authors.lastname: Tsang