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Show Keeping Up WiiRScIence Science Service. WNU Service. Elimination of Headlight Glare With New Material May Also Make Three-Dimension Three-Dimension Movies Possible BOSTON. A new optical material which promises to save thousands of lives now snuffed out in night driving- because be-cause of headlight glare is announced an-nounced by the Land Wheelwright Wheel-wright Laboratories of this city. Known as polaroid, the new material ma-terial Is also to be nsed for sun glasses which take away light dazzle daz-zle without darkening the view, and even more Important, make possible motion pictures In three dimensions that have the optical illusion of depth similar to viewing a scene with the naked eye. Other uses promised Include oneway one-way glass for cross-court privacy In apartment buildings and brilliant building exteriors that change color as one walks by. Substance Polarizes Light. Polaroid resembles a sheet of glass but has the ability to polarize the light which passes through it. Now ready to be produced In unlimited un-limited quantities, the new material Is the first practical use of what has formerly been a laboratory and research phenomenon. Polarized light is light which vibrates vi-brates only In one direction In contrast con-trast to the helter-skelter vibrations In the ordinary light ray. The best way to think of the complex com-plex phenomenon Is to regard ordinary ordi-nary light vibrations as a mass of straws tossed up In a wind. They are blown against a picket fence. All straws are stopped except those parallel to the slats In the fence and all straws coming through are lined up In one direction. The material ma-terial polarized acts as the picket fence. ' Would Ban Blinding Headlight. For use in automobiles all headlights head-lights would send out polarized light vibrating In one direction and all windshields would be "crossed" so that they would not permit such headlight rays to enter and blind the driver. The light from one's own headlights head-lights would strike the ground ahead, be scattered with a destruction destruc-tion of the polarization and hence such light would enter the car and make possible vision down the road Just as headlights act now. The three-dimensional motion pictures pic-tures are taken with a double camera cam-era having two lenses as far apart as the human eyes. When such films are shown the two views are projected on the same screen through polarizing sheets set at right angles to each other. The audience is supplied with special glasses. |
