Patent ID: 9212804
Filing Date: 2015-12-15
Classification: F21K,F21V,F21Y,G02B

Abstract:
1. A lens for a linear light source comprising a top and a bottom, the bottom comprising an incident surface, and a first supporting surface and a second supporting surface respectively at each side of the incident surface, and the top comprising an emergent surface, wherein the top further comprises a total internally reflective surface, and wherein in a cross section, the emergent surface is joined with the first supporting surface, the total internally reflective surface is joined with the second supporting surface, one part of light from the linear light source incidents into the incident surface and emerges after refracted by the emergent surface, and the other part of light incidents into the incident surface and reflected by the total internally reflective surface and then emerges after refracted by the emergent surface, wherein in the cross section, the total internally reflective surface is formed to be inclined with respect to an optical axis of the linear light source, and wherein an angle between a tangential direction of the total internally reflective surface and the bottom is bigger than 90°.