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. 2019 Feb 10;58(5):A156-A160.
doi: 10.1364/AO.58.00A156.

Miniature holographic projector with cloud computing capability

Michał Makowski, Adam Kowalczyk, Marcin Bieda, Jarosław Suszek, Izabela Ducin, Tomoyoshi Shimobaba, Yuki Nagahama, Tomoyoshi Ito

Miniature holographic projector with cloud computing capability

Michał Makowski et al. Appl Opt. .

Abstract

A fully functional miniaturized projection head below 5 cm3 is presented, using computer-generated holograms dynamically displayed on a liquid-crystal spatial light modulator. Spatial division of the modulator is used for color projection without color breakup, and specially designed, anti-reflection coated prisms ensure simple light paths with small losses. Real-time calculations are performed on a remote server with on-the-fly compression of holographic fringes. Cloud computing allows 1 W of local electrical power usage and apparent image brightness equivalent to 15-500 lm/W efficiency, depending on the displayed content. The properties of the projector allow future applications in handheld displays.

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