Patent ID: 8899808

Claim:
A luminaire module, comprising: multiple light-emitting elements positioned to emit light predominantly in a forward direction; a light guide extending in the forward direction from a first end of the light guide to a second end of the light guide, the light guide being positioned to receive at the first end light emitted by the light-emitting elements and configured to guide the light to the second end, wherein the light guide comprises a first side surface and a second side surface opposite the first side surface, the first and second side surfaces extending between the first end and the second end; and an optical extractor optically coupled to the light guide at the second end to receive light from the light-emitting elements guided from the first end to the second end of the light guide, the optical extractor comprising: a first interface positioned in a path of light exiting the light guide at the second end and configured to reflect a first portion of the light exiting the light guide and transmit a second portion of the light exiting the light guide so that the second portion of the light exits the optical extractor to an ambient environment prevalently in the forward direction, and a second interface positioned in a path of the first portion of the light reflected from the first interface, the second interface being concave relative to the reflected light and extending from the first interface to at least one of the first side surface or the second side surface of the light guide to transmit the reflected light that is incident on the second interface to the ambient environment prevalently in a backward direction opposing the forward direction, wherein the luminaire module extends along a lateral direction orthogonal to the forward direction.