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Appl Opt. 2011 Dec 1;50(34):H128-35. doi: 10.1364/AO.50.00H128.

Complex Fresnel hologram display using a single SLM.

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Department of Photonics, Feng Chia University, No. 100 Wenhwa Rd., Taichung 407, Taiwan.


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.


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