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Glasses-free 3D projector offers a cheap alternative to holograms
Holograms are undoubtedly spiffy-looking, but they're not exactly cheap; even a basic holographic projector made from off-the-shelf parts can cost thousands of dollars. MIT researchers may have a budget-friendly alternative in the future, though. They've built a glasses-free 3D projector that uses two liquid crystal modulators to angle outgoing light and present different images (eight in the prototype) depending on your point of view. And unlike some 3D systems, the picture should remain relatively vivid -- the technology uses a graphics card's computational power to preserve as much of an image's original information (and therefore its brightness) as possible.
