G - Physics – 02 – B
Patent
G - Physics
02
B
88/113
G02B 5/124 (2006.01) F24J 2/06 (2006.01) G02B 5/12 (2006.01) G02B 6/04 (2006.01) G02B 6/10 (2006.01) F21V 5/00 (2006.01) F21V 8/00 (2006.01) G02B 6/24 (2006.01) G02B 6/38 (2006.01)
Patent
CA 1279783
Abstract of the Disclosure A thin, flexible film made of a transparent polymeric material including a structured surface and an opposite smooth surface, wherein light striking either surface, within certain angular ranges, is totally internally reflected. The structured surface includes a linear array of miniature substantially right angled isosceles prisms arranged side-by-side to form a plurality of peaks and grooves. In addition, the perpendicular sides of the prisms make an angle of approximately 45° with the smooth surface, and when the film is curled the smooth surface lies in a smooth continuous arcuate curve without materially affecting the performance of the film. Because of the film's flexibility and its ability to totally internally reflect light, it may be utilized in a variety of ways, for example, as a collector of solar energy or as a light conduit. The performance of the film may be manipulated to permit controlled light leakage.
521320
Minnesota Mining And Manufacturing Company
Smart & Biggar
LandOfFree
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