Optical waveguide and lamp including same

摘要

An optical waveguide includes a body of optically transmissive material having a width substantially greater than an overall thickness thereof and including a first side, a second side opposite the first side, a central bore extending between the first and second sides and adapted to receive a light emitting diode, and extraction features on the second side. A light diverter extends into the central bore for diverting light into and generally along the width of the body of material. The extraction features direct light out of the first side and wherein at least one extraction feature has an extraction surface dimension transverse to the thickness that is between about 5% and about 75% the overall thickness of the body of material.

主权项

1. An optical waveguide, comprising
a body of optically transmissive material comprising a width substantially greater than a thickness thereof and comprising a first side, a second side opposite the first side, an interior coupling cavity extending between the first and second sides and adapted to receive a light emitting diode, and a plurality of extraction features on the second side; wherein the extraction features direct light out of at least the first side and wherein the plurality of extraction features is spaced from an outside edge of the body and each of the plurality of extraction features comprises an extraction surface dimension extending between the first and second sides that is between about 5% and about 75% of the overall thickness of the body of material; and wherein an extraction surface dimension of at least one of the plurality of extraction features is different than a corresponding extraction surface dimension of each of a first group of the plurality of extraction features, and a corresponding extraction surface dimension of each of a second group of the plurality of extraction features is different than the extraction surface dimension of the at least one extraction feature and the corresponding extraction surface dimension of each of the first group of the plurality of extraction features; wherein the first group of the plurality of extraction features is disposed farther from the interior coupling cavity than the at least one of the plurality of extraction features; wherein the second group of the plurality of extraction features is disposed farther from the interior coupling cavity than the first group and the at least one extraction feature of the plurality of extraction features; and wherein the thickness of the body tapers overall from a center to an outside edge thereof as a result of the extraction surface dimensions of the second group of the plurality of extraction features.