Phosphor based illumination system having a plurality of light guides and an interference reflector
First Claim
1. An illumination system, comprising:
- a light source that emits light comprising a first optical characteristic;
a plurality of light guides optically coupled to the light source, wherein each light guide comprises an input surface and an output surface;
emissive material positioned to receive light from at least one light guide of the plurality of light guides, wherein the emissive material emits light comprising a second optical characteristic when illuminated with light comprising the first optical characteristic; and
an interference reflector positioned such that the emissive material is between the output surfaces of the plurality of light guides and the interference reflector, wherein the interference reflector substantially transmits light comprising the second optical characteristic and substantially reflects light comprising the first optical characteristic.
1 Assignment
0 Petitions
Accused Products
Abstract
An illumination system including a light source, light guides coupled to the light source, each including an input surface and an output surface, emissive material positioned to receive light from at least one light guide, and an interference reflector positioned such that the emissive material is between the output surfaces of the light guides and the interference reflector is disclosed. The light source emits light having a first optical characteristic. The emissive material emits light having a second optical characteristic when illuminated with light having the first optical characteristic. The interference reflector substantially transmits light having the second optical characteristic and substantially reflects light having the first optical characteristic.
-
Citations
31 Claims
-
1. An illumination system, comprising:
-
a light source that emits light comprising a first optical characteristic; a plurality of light guides optically coupled to the light source, wherein each light guide comprises an input surface and an output surface; emissive material positioned to receive light from at least one light guide of the plurality of light guides, wherein the emissive material emits light comprising a second optical characteristic when illuminated with light comprising the first optical characteristic; and an interference reflector positioned such that the emissive material is between the output surfaces of the plurality of light guides and the interference reflector, wherein the interference reflector substantially transmits light comprising the second optical characteristic and substantially reflects light comprising the first optical characteristic. - 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. A method of providing illumination to a desired location, comprising:
-
illuminating at least one light guide of a plurality of light guides with light comprising a first optical characteristic, wherein the at least one light guide directs the light through an output surface; illuminating emissive material with the light directed through an output surface of the at least one light guide such that the emissive material emits light comprising a second optical characteristic; illuminating an interference reflector with light emitted by the emissive material, wherein the interference reflector substantially transmits light comprising the second optical characteristic and substantially reflects light comprising the first optical characteristic; and directing at least a portion of the light transmitted by the interference reflector to the desired location.
-
Specification