Third Dimension Movies And E X P A N D E D Screen (1953)

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162 THREE-DIMENSIONAL MOTION PICTURES All other third dimension systems using glasses for viewing the projected pictures are similar to Natural Vision, so it would only be a duplication of effort to list these individually, -Direct drive polarizer attachment, showing barrel and mounted poIaroid filter. The filter rotates before projector lens, is heart of the alternate frame technique described by author. ALTERNATE FRAME SYSTEM A system of third dimension motion pictures in color for use with a Bell & Howell 16 mm projector, has recently been developed by the Technical Photo graphic Service Section, of the Wright Air Development Center, in Dayton, Ohio. Major Robert V. Bernier who helped in developing the equipment explains its adaptability and applications