Optical waveguide and luminaire incorporating same
First Claim
1. An optical waveguide, comprisinga body of optically transmissive material comprising a width substantially greater than an overall thickness thereof, the body of material comprising a first shape transverse to the width and thickness of the body of material, 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 plurality of extraction features direct light out of at least the first side and wherein at least one extraction feature comprises an extraction feature depth extending from the second side toward the first side that is between about 5% and about 75% of the overall thickness of the body of material and is defined by first and second surfaces that are disposed at different angles relative to the first side;
wherein at least one extraction feature of the plurality of extraction features at least partially surrounds the interior coupling cavity;
wherein each of the extraction features of the plurality of extraction features comprises a plurality of sections circumferentially curved about the interior coupling cavity comprising a second shape complementary to the first shape of the body of material; and
wherein the curved sections meet at inflection points disposed therebetween.
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Accused Products
Abstract
An optical waveguide includes a body of optically transmissive material having a width substantially greater than an overall thickness thereof. The body of material has a first side, a second side opposite the first side, and a plurality of interior bores extending between the first and second sides each adapted to receive a light emitting diode. Extraction features are disposed on the second side and the extraction features direct light out of at least the first side and at least one extraction feature forms a taper disposed at an outer portion of the body.
539 Citations
20 Claims
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1. An optical waveguide, comprising
a body of optically transmissive material comprising a width substantially greater than an overall thickness thereof, the body of material comprising a first shape transverse to the width and thickness of the body of material, 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 plurality of extraction features direct light out of at least the first side and wherein at least one extraction feature comprises an extraction feature depth extending from the second side toward the first side that is between about 5% and about 75% of the overall thickness of the body of material and is defined by first and second surfaces that are disposed at different angles relative to the first side; wherein at least one extraction feature of the plurality of extraction features at least partially surrounds the interior coupling cavity; wherein each of the extraction features of the plurality of extraction features comprises a plurality of sections circumferentially curved about the interior coupling cavity comprising a second shape complementary to the first shape of the body of material; and wherein the curved sections meet at inflection points disposed therebetween. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An optical waveguide, comprising:
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a body of optically transmissive material comprising a width substantially greater than an overall 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 plurality of extraction features direct light out of at least the first side and wherein at least one extraction feature comprises an extraction feature depth extending from the second side toward the first side that is between about 5% and about 75% of the overall thickness of the body of material; wherein a spacing between each of the plurality of extraction features increases overall with distance from a center line of the waveguide body; and wherein the interior coupling cavity comprises a plurality of curved facets and each facet is opposite one or more LEDs. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification