Illumination devices including multiple light emitting elements
First Claim
1. A luminaire, comprising:
- at least one light-emitting diode (LED);
a light guide comprising two opposing planar surfaces both extending from a first end to a second end, the light guide being positioned to receive at the first end light emitted by the light-emitting diode and guide it between the planar surfaces to the second end; and
an optical extractor optically coupled to the light guide at the second end, the optical extractor comprising a cylindrical element having a cylinder axis and a wedge-shaped groove extending along a cylinder axis, wherein the wedge-shaped groove forms a first optical interface and a cylindrical surface of the cylindrical element forms a second optical interface, the first optical interface being positioned to reflect light exiting the light guide and the second optical interface being configured to transmit light reflected by the first optical interface,wherein for a cross-sectional plane, the first optical interface has a shape that comprises a vertex of the wedge-shaped groove.
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Accused Products
Abstract
A variety of illumination devices are disclosed that are configured to manipulate light provided by one or more light-emitting elements (LEEs). In general, embodiments of the illumination devices feature one or more optical couplers that redirect illumination from the LEEs to a reflector which then directs the light into a range of angles. In some embodiments, the illumination device includes a second reflector that reflects at least some of the light from the first reflector. In certain embodiments, the illumination device includes a light guide that guides light from the collector to the first reflector. The components of the illumination device can be configured to provide illumination devices that can provide a variety of intensity distributions. Such illumination devices can be configured to provide light for particular lighting applications, including office lighting, task lighting, cabinet lighting, garage lighting, wall wash, stack lighting, and downlighting.
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Citations
44 Claims
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1. A luminaire, comprising:
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at least one light-emitting diode (LED); a light guide comprising two opposing planar surfaces both extending from a first end to a second end, the light guide being positioned to receive at the first end light emitted by the light-emitting diode and guide it between the planar surfaces to the second end; and an optical extractor optically coupled to the light guide at the second end, the optical extractor comprising a cylindrical element having a cylinder axis and a wedge-shaped groove extending along a cylinder axis, wherein the wedge-shaped groove forms a first optical interface and a cylindrical surface of the cylindrical element forms a second optical interface, the first optical interface being positioned to reflect light exiting the light guide and the second optical interface being configured to transmit light reflected by the first optical interface, wherein for a cross-sectional plane, the first optical interface has a shape that comprises a vertex of the wedge-shaped groove. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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Specification