Patent ID: 8746931

Claim:
A light incoupling structure for lighting applications, comprising: an optically substantially transparent medium for transporting light emitted by a light source, wherein the medium comprises an input surface to receive the light emitted by the light source and an output surface; a first optical element arranged in the medium for spreading light in an initial propagation direction in the medium between the input surface and the output surface of the medium, towards sides of the medium relative to the initial propagation direction between said input and output surfaces, wherein said first optical element comprises at least one hole in the medium between the input surface of the medium and the output surface of the medium, the at least one hole having one or more substantially ‘x’ or ‘v’-type sharp-edged or rounded shapes in a cross-sectional planar view of the medium with a plane that is substantially defined by an optical axis of the light source and the input surface of the medium; and a second optical element comprising a plurality of micro-optic surface relief forms arranged relative to the medium for redirecting the light propagated through the medium.