Multi-region optics for flat illumination
A multi-region lighting system for flat illumination includes one or more light sources and an optic. The optic comprises a first region characterized by a first refractive-index feature and a second region characterized by a second refractive-index feature. The second region comprises a ridge structure. The first and second refractive-index features and the ridge structure are operative to produce a composite light distribution from the one or more light sources.
1 . A system for a light fixture comprising
one or more light sources; and
an optic, wherein:
the optic comprises:
a first region comprising a first feature, wherein the first feature is a first texture; and
a second region comprising a second feature and a ridge structure in the second region, wherein:
the second feature is a second texture; and
the first texture is rougher than the second texture; and
the first feature, the second feature, and the ridge structure are arranged to produce a composite light distribution from the one or more light sources.
2 . The system of claim 1 , wherein:
the optic comprises a first side and a second side opposite the first side;
the first side faces the one or more light sources;
the first texture is on a surface of the second side of the optic;
the second texture is on the surface of the second side of the optic; and
the ridge structure is on the first side of the optic.
3 . The system of claim 1 , wherein the second feature is formed by roughness on a surface of the optic.
4 . The system of claim 1 , wherein there is no ridge structure in the first region.
5 . The system of claim 1 , wherein:
the ridge structure is arranged to focus light, from the one or more light sources, within the second region; and
the first feature is arranged to disperse light from the one or more light sources.
6 . The system of claim 1 , wherein:
the ridge structure is a first Fresnel structure; and
the second region is arranged to be replaceable by a second Fresnel structure having a different focal length than the first Fresnel structure.
7 . The system of claim 1 , wherein:
the first region has an elliptical shape;
the second region has an elliptical shape;
the second region is inside the first region; and
the first region is concentric with the second region.
8 . The system of claim 1 further comprising a trim having a height equal to or less than 3 inches.
9 . A method comprising:
generating light from one or more light sources;
transmitting a first portion of light from the one or more light sources through a first region of an optic, wherein the first region is characterized by a first feature; and
transmitting a second portion of light from the one or more light sources through a second region of the optic, wherein:
the second region is characterized by a second feature and a ridge structure in the second region; and
the first feature, the second feature, and the ridge structure are operative to produce a composite light distribution from the one or more light sources;
the first feature is a first texture;
the second feature is a second texture; and
the first texture is rougher than the second texture.
10 . The method of claim 9 , wherein:
the optic comprises a first side and a second side opposite the first side;
the first side faces the one or more light sources;
the first texture is on surface of the second side of the optic;
the second texture is on the surface of the second side of the optic; and
the ridge structure is on the first side of the optic.
11 . The method of claim 9 , wherein:
the first region has an elliptical shape;
the second region has an elliptical shape;
the second region is inside the first region; and
the first region is concentric with the second region.
12 . The method of claim 9 , wherein the ridge structure is a Fresnel lens.
13 . The method of claim 9 , further comprising reflecting at least some of the first portion of light from a trim before transmitting through the first region.
14 . The method of claim 9 , wherein the second feature is a freeform lens.
15 . The method of claim 9 , wherein there is no ridge structure in the first region.
16 . A system comprising:
one or more light sources; and
an optic, wherein:
the optic comprises:
a first region comprising a first feature, wherein the first feature is a first texture; and
a second region comprising:
a second texture, wherein the second texture is finer than the first texture; and
a second feature arranged to focus light; and
the first feature and the second feature are arranged to produce a composite light distribution from the one or more light sources.
17 . The system of claim 16 , further comprising a trim having a height equal to or less than 3 inches tall.
18 . The system of claim 16 , wherein the second feature is a Fresnel lens.
19 . The system of claim 16 , wherein the second feature is a lens.
20 . The system of claim 16 , wherein the second feature is a freeform lens.