The Dolby 3D system relies on a spinning filter wheel to alternate rapidly between two slightly different sets of primary colors. Corresponding filters on 3D glasses only let the appropriate light into the left or right eye after the light reflects off the screen. The filter wheel is synchronized with the digital projector, which switches back and forth between the images for the left and right eyes six times per frame, or 144 times per second. The equipment costs about $26,000, Dolby said.
October 8, 2007 3:55 AM PDT
Photo by: Dolby Laboratories
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