"Holographic projection of 2D (rather than 3D) images represents a compelling alternative to conventional image projection. Holograms are efficient: they work by routing light to the places where you want it, and away from the places you don't. Video projectors based on this holographic technology require only a very few components, which means they can be made very small - and the smaller you make holograms, the better the image that results. So a projector could be integrated into a laptop, a PDA, or even a mobile phone
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How does it work?
A hologram pattern, which to the naked eye looks like a collection of random dots, is displayed on a small liquid-crystal-on-silicon (LCOS) microdisplay - a tiny, very fast liquid crystal display built on top of a chip. The hologram patterns are calculated by Light Blue Optics' proprietary "hologram chip" so that when the microdisplay is illuminated by laser light, the light interferes with itself in a complex manner through the physical process of diffraction which, when carefully controlled, results in the formation of a large, high quality projected image on, for example, a screen or a wall. Unlike a conventional video projector, heavy, bulky lenses are not required: diffraction does all the work for you, and the projected image is sharp and in focus at any distance.
"Steve's Commentary
This is not the 3D holograms like in the movies, but is a very innovative type of projection display. The two things that struck me were the potential for a small form factor and the infinite focus.
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