A new advance by Hewlett Packard researchers, announced this week in Nature, could put 3D video in the palm of your hand within the next few years. The new tech is an autostereoscopic multiview 3D display. In English, that's glasses-free 3D imaging you can see from any angle.
Three-dimensional viewing works by making each eye see an image from a slightly different perspective, as we do when viewing real-life objects. Glasses make this easy, as they can filter out two simultaneously projected images so that each eye sees only one. But glasses-free 3D has been a goal of TV and mobile developers for a while now, because wearing 3D glasses at home is annoying, and relying on glasses to view 3D images on your tablet or cellphone would be downright ridiculous.
Current or glasses-free tech works by projecting two images in different directions—as opposed to 2D screens, which have pixels that send light in all directions at once. The problem with this is that the viewer needs to stand within a strict viewing field. If the viewer's nose isn't precisely where it needs to be, his or her eyes won't pick up the right images.
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