Patent ID: 8485692
Filing Date: 2013-07-16
Classification: F21K,F21V,F21Y,G02B

Abstract:
1. An apparatus comprising: a light emitting diode (LED) based illumination device comprising at least one LED operable to emit an amount of light, the LED based illumination device having an optical axis; a reflector element having an input port and an output port, the reflector element mounted to the LED based illumination device, wherein the light emitted from the at least one LED exits the LED based illumination device through the input port of the reflector element; and a transmissive lens element including a first surface, a second surface, a third surface, and a fourth surface, wherein a first portion of the light emitted from the at least one LED passes through the first surface and the second surface, refracts toward the optical axis, and exits the output port of the reflector element without interacting with the reflector element, and wherein a second portion of the light emitted from the at least one LED passes through the third surface and the fourth surface, refracts away from the optical axis, is reflected by the reflector element, and exits the through the output port of the reflector element, and a scattering feature at an intersection of the first surface and the third surface, wherein the scattering feature is not present at a remainder of the first surface and a remainder of the third surface.