Patent ID: 8246216
Filing Date: 2012-08-21
Classification: F21K,F21V,F21Y,G02B,H01L

Abstract:
1. A lens, comprising: an optical body member having a first end, a second end opposite the first end, and an outer surface, the optical body member being substantially symmetric with respect to an optical axis, the outer surface being shaped to provide total internal reflection for light from a light source having a specified position in relation to the first end, the optical body member further having an interior open channel extending longitudinally from the first end to the second end thereof, the interior open channel being substantially symmetric with respect to the optical axis, the interior open channel having a first opening at the first end for accommodating the light source and a second opening at the second end, the optical body member further having a plurality of refractive surface regions disposed in the second end thereof and around the second opening of the interior open channel; and a plurality of protrusions extending from the first end of the optical body member, the protrusions being disposed circumferentially around the first opening of the interior open channel and arranged to center the optical body member and to maintain the optical body member at a predetermined position with respect to the light source.