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The technology behind 3D movies

October 8, 2007 3:55 AM PDT
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Real D's disposable glasses are relatively inexpensive--about 50 cents apiece--and can be branded with promotional material for the movie being shown. The lenses let through a particular type of light, which has been circularly polarized, but one lens is right-circularly polarized and the other left-circularly polarized.

Credit: Real D

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