G - Physics – 02 – B
Patent
G - Physics
02
B
240/145
G02B 6/00 (2006.01) F21V 8/00 (2006.01) G02B 6/032 (2006.01) G02B 6/10 (2006.01)
Patent
CA 1283893
APPARATUS FOR CONTINUOUSLY CONTROLLED EMISSION OF LIGHT FROM PRISM LIGHT GUIDE Abstract of the Disclosure A variety of techniques are used to effect continuously controlled emission of light from a light guide. For example, the light guide may contain a mechanism formed of a substantially non-light absorptive material having a density which varies as a function of the length of the light guide. The mechanism causes light to escape from the light guide at a rate which varies along the length of the light guide, such that the amount of light escaping, per unit length, along the light guide has a selected distribution of values. Al- ternatively, the light guide's central path may be non- linear. As a further alternative, the average cross- sectional dimension of each of the plane segments afore- said may be non-constant. As yet another alternative, a first portion of the light guide may comprise prism light guide material and the remaining portion may be such that a substantial portion of light incident there- upon is allowed to escape therethrough.
566218
Minnesota Mining And Manufacturing Company
Oyen Wiggs Green & Mutala Llp
LandOfFree
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