Lighting devices having optical waveguides for controlled light distribution
AssigneeCree Lighting USA LLC
InventorsKurt Wilcox, Jin Hong Lim, Curt Progl, Steve Wilcenski, Zongjie Yuan
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Abstract
In one aspect, optical elements and luminaires employing optical elements are described herein. In some embodiments, an optical element comprises a planar light transmissive body comprising a light input surface and a light output surface opposite the input surface, and light redirection features arranged over the light input surface and the light output surface, the light redirection features comprising refractive facets, reflective facets, facets supporting total internal reflection within the planar light transmissive body, or combinations thereof.
Claims18
An optical element comprising:
- a planar light transmissive body comprising a light input surface and a light output surface opposite the input surface;
- and
- light redirection features arranged over the light input surface and the light output surface, the light redirection features comprising refractive facets, reflective facets, facets supporting total internal reflection within the planar light transmissive body, or combinations thereof, wherein:
- the light redirection features arranged over the light input surface mix light received from one or more light sources for passage through the planar light transmissive body, and/or
- the light redirection features arranged over the light output surface mix light received from the input surface as the light exits the planar light transmissive body.
A luminaire comprising:
- a lighting panel comprising a plurality of light emitting diodes (LEDs);
- and
- an optical panel arranged over the lighting panel, the optical panel comprising a planar light transmissive body comprising a light input surface and a light output surface opposite the input surface, and light redirection features arranged over the light input surface and the light output surface, the light redirection features comprising refractive facets, reflective facets, facets supporting total internal reflection within the planar light transmissive body, or combinations thereof, wherein:
- the light redirection features arranged over the light input surface mix light received from the LEDs for passage through the planar light transmissive body.
Dependencies are inferred from the claim text.