Tiny Projectors: Hologram and Lasers, Not Smoke and MirrorsResearchers from Cambridge and Light Blue Optics, Ltd. have developed a prototype pocket-sized, battery-powered video projector — or at least the technology that should, in the mythical two to five years, lead to one. The trick is a total lack of lenses or light bulbs, but instead to display a two-dimensional hologram on a microdisplay then shine a laser through it, which scatters the light into a larger, projected picture. Projectors are great — I'm about to pick up a cheap one, myself. If they could slip these into cellphones or PDAs, there would be no need for roll-up screens or dorky mirrorshade HUDs at all. All you'd need is a clean wall and a total blotting out of the star we call our sun.
Read - Holograms Enable Pocket Projectors [TechnologyReview]

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