Use digital phase to achieve a compact lensless
full-color holographic projection system
Posted on 2020-03-10 - 22:14
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. To simplify the system, 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.
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Gong, Zhaoyu; Chen, Xing; Guo, Zhongyuan; Yu, Feihong (2020). Use digital phase to achieve a compact lensless
full-color holographic projection system. Optica Publishing Group. Collection. https://doi.org/10.6084/m9.figshare.c.4691468.v1
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AUTHORS (4)
ZG
Zhaoyu Gong
XC
Xing Chen
ZG
Zhongyuan Guo
FY
Feihong Yu