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| 3D Displays Without Special Eyewear |
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posted by Editor on Wednesday December 18, @10:37PM
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This article in Scientific American discusses some emerging display technologies that make computer-generated models appear as solid, three-dimensional objects without requiring viewers to wear special glasses. New York University's Media Research Laboratory is working on a device called an autostereoscopic display, which has a sheet of liquid crystal positioned about three inches in front of the display, and small cameras surrounded by tiny infrared lights on each side of the screen. The barrier forms vertical black stripes that move rapidly from left to right, and the cameras track the positions of the user's eyes by measuring the reflection of the light off the user's retinas (see image from different perspectives - notice the changing shadow positions). Also, Columbia University researchers are working on a display technology called the Lighting Sensitive Display, which can judge the direction of the exterior light striking a computer screen and then adjust the image on the screen so that it has the appropriate shadows and reflections.
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