Show Up I i ien e 0 c n er lr e 0 Science Service Service Elimination of Headlight G Glare are With New Nev Material Materia May l Also Make Three- Three Dimension Movies Possible A BOSTON A new optical material which promises to save thousands of lives now snuffed out in night driving because because because be be- cause of headlight glare is announced announced announced an an- by the Land Wheelwright Wheelwright Wheelwright Wheel Wheel- wright Laboratories of this city Known ns as polaroid the new material ma ma- tonal Is also to be used for sun slIn sunglasses sunglasses glasses which take mke away light dazzle dazzle dazzle daz daz- 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 one one- way glass for tor cross court privacy In apartment bull buildings dings and brilliant building exteriors that change color as ns one walks inU by Substance Polarizes Light Polaroid resembles a n sheet of glass but has bas the ability to polarize the light which passes through It Now ready to be produced In unlImited unlimited unlimited un un- un- un limited qun quantities tItles the new material Is the first practical use of ot what has formerly been a n laboratory and research phenomenon Polarized light Is light which vibrates vi vibrates vibrates vi- vi brates only In one direction In contrast contrast contrast con con- to the helter sl helter elter vibrations In n the ordinary light ray The best way to think of the complex complex complex com com- plex phenon phenomenon enon Is to regard ordinary ordinary nary light vibrations as ns n a a mass of straws tossed up In a n wind They are blown against a picket fence All AU straws are stopped except those parallel l to the slats In the fence and all aU straws coming through are lined up In one direction The material material ma mn- polarized acts as ns' ns the picket fence Would Ban Blinding Headlight For use In automobiles all headlights headlights head bead lights would send out polarized light vibrating In one direction and andall andall all nil windshields would be crossed so EO that they would not permit such headlight rays to enter and blind bUnd the driver er The light from ones one's own headlights headlights head bead lights would strike e the ground ahead be scattered with a n des destruction tion llon of the polarization and hence such light would enter the car and make e possible vision Islon down the road Just as ns bea headlights act net now The three three dimensional motion pictures pictures pictures pic pic- tures are taken with a double camera camera cam cam- era having two lenses as far apart as the human buman e eyes es 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 Theau au audience lence Is supplied with special glasses |