Glasses-Free 3D tech based on true holograms

Many people think any 3D image is a hologram – but most 3D images are not holograms at all.

Holograms are a specific method of storing light wave interference patterns on, say, 2D film, in a such a way that when a light passes through the film, the original true 3D image is recreated. A 3D hologram can viewed – glasses free – from any position. It’s not a stereoscopic image.

Researchers are developing true holographic displays based on acoustically modulated crystals that change their refraction. It’s a very clever idea.

Cheap Holograms Could Give Rise to Glasses-Free 3D TVs.

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