G - Physics – 02 – B
Patent
G - Physics
02
B
88/97
G02B 6/00 (2006.01) F21V 8/00 (2006.01) G02B 6/032 (2006.01) G02B 6/10 (2006.01) G02B 6/24 (2006.01) G02B 6/38 (2006.01)
Patent
CA 1268969
Abstract of the Disclosure A hollow, tubular light conduit including a wall of a transparent polymeric material, and the wall having a structured surface and an opposite, smooth, glossy surface, and at least a portion of the cross-section of the wall lying in a smooth arcuate curve, wherein light striking the inner surface, within an acceptable angular range, is contained by total internal reflection. The structured surface includes a linear array of substantially right angled isosceles prisms arranged side-by-side to form grooves. In addition, the perpendicular sides of the prisms make an angle of approximately 45° with the tangent to the smooth surface. Because of the flexibility of the light conduit and its ability to totally internally reflect light, a manipulated light conduit may be utilized in a variety of ways, for example, as a light fixture whereby some of the light directed into the light conduit is emitted from the light conduit for illumination or for use as a secondary light source. A suitable light source may include artificial or solar energy. However, when the light fixture operates as a warning light it is preferred that a strobe light be used.
521319
Minnesota Mining And Manufacturing Company
Smart & Biggar
LandOfFree
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