Patent ID: 9028120
Filing Date: 2015-05-12
Classification: F21S,F21V,F21Y,G02B

Abstract:
1. A luminaire, comprising: at least one light-emitting diode (LED); a light guide comprising two opposing planar surfaces both extending from a first end to a second end, the light guide being positioned to receive at the first end light emitted by the light-emitting diode and guide it between the planar surfaces to the second end; and an optical extractor optically coupled to the light guide at the second end, the optical extractor comprising a cylindrical element having a cylinder axis and a wedge-shaped groove extending along a cylinder axis, wherein the wedge-shaped groove forms a first optical interface and a cylindrical surface of the cylindrical element forms a second optical interface, the first optical interface being positioned to reflect light exiting the light guide and the second optical interface being configured to transmit light reflected by the first optical interface, wherein for a cross-sectional plane, the first optical interface has a shape that comprises a vertex of the wedge-shaped groove.