Patent ID: 7572036
Filing Date: 2009-08-11
Classification: F21V,F21Y,G02B,G02F,H01L

Abstract:
1. A lens for a light emitting diode, comprising: a base; a first curved surface extending from a circumference of the base; and a first curved central surface centered between and extending from the first curved surface, wherein the first curved surface is curved along a vertical direction section wherein a distance from a center of the base to any one point of a plurality of points of the first curved central surface is shorter than a radius of curvature for the point of the first curved central surface, wherein the lens includes a hollow portion formed from the base, wherein the hollow portion forms an inner surface of the lens and is comprised of a second curved surface and a second curved central surface extending from the second curved surface, and wherein a distance from the center of the base to a point of the second curved central surface is longer than a radius of curvature for the point of the second curved central surface.