Patent ID: 6206549
Filing Date: 2001-03-27
Classification: F21V

Abstract:
A light reflector having an internal reflective surface rotationally symmetrical about a central axis, a single parabolic shape in any cross-section including the central axis, a single focus on the central axis, a first opening coaxial with the central axis for insertion of a light bulb with a filament, and a second opening, larger than the first opening, at a rim of the light reflector for escape of light produced by the light bulb and reflected from the internal reflective surface, the internal reflective surface being divided by a plane orthogonal to the central axis into a first portion extending from the first opening to the plane and a second portion extending from the plane to the second opening, the plane being closer to the rim than the filament of the light bulb inserted through the first opening, the first portion having a smooth surface extending from the first opening to the plane, and the second portion having a faceted surface extending from the plane to the second opening, wherein the faceted surface includes coaxial rings of contiguous trapezoidal facets.