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This story is from the category Display Technology
Date posted: 08/02/2008 A rewritable hologram material is being investigated by US scientists as a means to bring 3D displays to the home, or provide dramatically high-capacity computer memory. A layer of the material can record a holographic image, erase it, and replace it with another in a few minutes. While technological challenges remain, the researchers Peyghambarian and colleague Savas Tay of Arizona, are confident they can advance the technology to refresh pictures at video frame rates of around 30 times a second. They modified a plastic used in optical communications systems that can have the way it bends, or refracts, light changed using laser beams. The researchers chemically tuned it to respond more to the lasers, and to reproduce colours better. When two "writing" beams meet inside the material a build up of electric charge changes the refractive index in that spot. The effect can be reversed using a burst of uniform laser illumination. The Arizona team built a rewritable hologram on a 10 centimetre square film of the material less than a millimetre thick. The only problem? It requires 10 kilowatts of electricity to update each frame. See the full Story via external site: technology.newscientist.com Most recent stories in this category (Display Technology): 08/02/2017: New method improves accuracy of imaging systems |
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