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
a first interference reflector positioned between the emissive material and the output surfaces of the plurality of light guides, wherein the first interference reflector substantially transmits light comprising the first optical characteristic and substantially reflects light comprising the second optical characteristic.
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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 a first interference reflector positioned between the emissive material and the output surfaces of the light guides 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 first interference reflector substantially transmits light having the first optical characteristic and substantially reflects light having the second optical characteristic.
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Citations
33 Claims
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1. An illumination system, comprising:
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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 a first interference reflector positioned between the emissive material and the output surfaces of the plurality of light guides, wherein the first interference reflector substantially transmits light comprising the first optical characteristic and substantially reflects light comprising the second 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, 32)
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33. A method of providing illumination to a desired location, comprising:
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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 a first interference reflector with light from the output surface of the at least one light guide, wherein the first interference reflector substantially transmits light comprising the first optical characteristic and substantially reflects light comprising a second optical characteristic; illuminating emissive material with the light transmitted by the first interference reflector such that the emissive material emits light comprising the second optical characteristic; and directing at least a portion of the light emitted by the emissive material to the desired location.
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Specification