Patent ID: 9625636
Date: 2017-04-18
CPC Classifications: F21S,F21V,F21Y,G02B

Claim:
1. A waveguide body comprising a length from a first end to a second end, comprising: a central section extending along the entire length of the waveguide body and comprising a first thickness; first and second opposed side sections extending away from the central section along the length of the waveguide body, the first side section comprising a second thickness, the second side section comprising a third thickness the second thickness being less than the first thickness and the third thickness being less than the first thickness; and a coupling portion located in the central section, wherein the coupling portion comprises first and second coupling surfaces defining at least in part an elongate coupling cavity extending along the length of the waveguide body, and wherein the coupling portion further comprises first and second control surfaces, and wherein the first and second coupling surfaces are configured to direct light onto the first and second control surfaces, and the first and second control surfaces are configured to direct light into at least one of the first and second opposed side sections; wherein the at least one side section comprises extraction features to extract light out of opposing sides of the at least one side section as the light propagates through the at least one side section.