F - Mech Eng,Light,Heat,Weapons – 21 – V
Patent
F - Mech Eng,Light,Heat,Weapons
21
V
F21V 7/09 (2006.01) F21V 7/04 (2006.01) F21S 3/00 (1990.01)
Patent
CA 2106984
A lamp assembly includes a reflector having a concave reflecting surface and an axis of rotation, and a light source includ- ing a filament mounted at or near a focal point of the reflecting surface. The filament has a length to diameter ratio of 6:1 or grea- ter. The reflecting surface is formed as a multiplicity of reflecting facets. The facets on at least 50 % of the reflecting surface have dimensions and curvatures selected to produce a light pattern wherein a ratio of filament width spread to filament length spread produced by the facets is at least 2:1. Preferably, the facets are arranged in axially adjacent rings. The facets rings can be succes- sively offset in a rotational direction so as to reduce circumferential variations in the light pattern.
Deweerdt Lieven A.
Levin Robert E.
Gte Products Corporation
R. William Wray & Associates
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