Patent ID: 7659552
Filing Date: 2010-02-09
Classification: F21K,F21V,F21Y,G02B,H01L

Abstract:
1. An optical lens comprising: a generally funnel-shaped top surface; a base portion opposite to the top surface; and a peripheral side surface defining a first refractive portion, wherein the first refractive portion comprises a first refractive section and a second refractive section, the first refractive section and the second refractive section each comprises a plurality of ridge structures, each of the ridge structures has a triangular cross-section, the ridge structures of the first refractive section comprise a plurality of first refractive surfaces having a same first slant angle relative to a central axis of the optical lens, the ridge structures of the second refractive section comprise a plurality of second refractive surfaces having a same second slant angle relative to the central axis, and the first slant angle of the first refractive surfaces is different from the second slant angle of the second refractive surfaces.