Patent ID: 8967838
Filing Date: 2015-03-03
Classification: F21K,F21V,F21Y,H05K

Abstract:
1. An illumination source comprising: a metallic substrate having an internal concave optical reflecting surface that is symmetrical about a longitudinal axis; a plurality of light emitting diodes being mounted on the internal concave optical reflecting surface to form an extended light source providing a beam exiting the light source in at least a direction along the longitudinal axis, wherein the light emitting diodes are mounted at no higher than a predetermined areal density, such that heat generated by the light emitting diodes are dissipated through the metallic substrate so as to maintain an operating temperature at the internal optical reflecting surface to be less than 100° C., and wherein each emitting diode is packaged to provide a Lambertian emission profile; a reflector housing spaced apart from the metallic substrate so as to define a plenum therebetween; and electrical connections to provide power to the light emitting diodes.