Compact lensless full-color holographic projection system with digital phase

PLUTO / PLUTO-2 Spatial Light Modulators
Digital-/ Computer Holography/ CGH
Published on:
Authors: Zhaoyu Gong and Xing Chen and Zhongyuan Guo and Feihong Yu
Abstract:

” A lensless full-color holographic projection system is proposed, satisfying the requirement of compactness and flexibility. The system enables projection by illuminating a single-chip spatial light modulator (SLM) simultaneously with red (R), green (G), and blue (B) lasers, in which the SLM loads a color-multiplexed phase-only hologram. To strengthen compactness, filtering and achromatic systems are achieved by digital phase, where the digital lens phase focuses the light field onto the filter plane, and the digital blazed gratings shift the RGB images to achieve a fine alignment. Besides, the flexibility of diffraction calculation is enhanced by the cascaded D-FFT and S-FFT algorithm (CDS algorithm, where D-FFT is acronym of double fast fourier transform and S-FFT is acronym of single fast fourier transform). Both simulation and optical experiments are carried out. We conducted 2D image and animation projection and multi-image-plane projection. The results confirm the feasibility of our method.”

Open Access

Publication: OSA Continuum
Issue/Year: Vol. 3, Issue 3, pp. 676-687
DOI: 10.1364/OSAC.380132
Link: https://doi.org/10.1364/OSAC.380132

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