Tiny Projectors: Hologram and Lasers, Not Smoke and Mirrors

This image was lost some time after publication, but you can still view it here.
This image was lost some time after publication, but you can still view it here.

Researchers 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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