Patent ID: 8333488
Filing Date: 2012-12-18
Classification: F21V,F21W,F21Y

Abstract:
1. An optical assembly for producing light having improved collimation and homogenization, comprising: a primary reflector having a reflective surface disposed and configured to receive widely-collimated light from LEDs and to produce first reflected light, each LED being disposed within a cup-shaped cavity having an interior reflective wall, at least a portion of the reflective surface of the primary reflector having facets, the reflective surface further comprising a shape similar to a cone having a narrow end pointed toward the LEDs; a secondary reflector having an entrance aperture extending therethrough, the entrance aperture disposed and configured to allow the widely-collimated light from the LEDs to pass therethrough toward the primary reflector, an inner concave reflective surface disposed and configured to reflect the first reflected light to produce second reflected light, and an exit aperture at a top of the inner concave reflective surface, at least a portion of the inner concave surface of the secondary reflector having facets; and a primary support means for positioning the primary reflector at a predetermined location within the widely-collimated light, wherein the reflective surface of the primary reflector comprises a first portion that defines the shape similar to a cone, a second portion that defines a concave reflective surface, and a third portion that defines a convex reflective surface, the second portion being intermediate the first and third portions.