MULTI-CAVITY LED ARRAY RGB COLLIMATION OPTIC
First Claim
Patent Images
1. An apparatus for producing collimated uniform white light, comprising:
- a reflecting cavity having a predetermined reflective surface texture, configured to receive light from a light engine and to produce reflected light;
a micro-lenslet array disposed to receive at least a portion of the reflected light to produce a first dispersed light;
a concave lens disposed to receive at least a portion of the first dispersed light to produce a second dispersed light; and
a collimation reflector disposed to reflect at least a portion of the second dispersed light to produce collimated uniform white light.
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Abstract
This invention relates to optical devices. More specifically, the present invention relates to a collimated optical light source assembly that produces a uniform white light. Specifically, light from a multi-cavity RGB LED array is dispersed in a reflecting cavity having a Lambertian texture on the interior surface. The light is then emitted though a lenslet array and a cone lens which together further disperses the light emitted by the individual LEDs. The dispersed light is then collimated by a reflector.
41 Citations
25 Claims
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1. An apparatus for producing collimated uniform white light, comprising:
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a reflecting cavity having a predetermined reflective surface texture, configured to receive light from a light engine and to produce reflected light; a micro-lenslet array disposed to receive at least a portion of the reflected light to produce a first dispersed light; a concave lens disposed to receive at least a portion of the first dispersed light to produce a second dispersed light; and a collimation reflector disposed to reflect at least a portion of the second dispersed light to produce collimated uniform white light. - View Dependent Claims (2, 3, 8, 9, 11)
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4-6. -6. (canceled)
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10. (canceled)
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12. (canceled)
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13. A system for producing collimated uniform white light, comprising:
- a light engine;
a reflecting cavity having a predetermined reflective surface texture, configured to receive light from the light engine and to produce reflected light;
a micro-lenslet array disposed to receive at least a portion of the reflected light to produce a first dispersed light;
a concave lens disposed to receive at least a portion of the first dispersed light to produce a second dispersed light; and
a collimation reflector disposed to reflect at least a portion of the second dispersed light to produce collimated uniform white light. - View Dependent Claims (14, 15, 16, 17, 18)
- a light engine;
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19. A method for producing collimated uniform white light, comprising the following steps:
- emitting light using a plurality of LEDs disposed within a plurality of light-engine cavities;
reflecting at least a portion of the emitted light, using a reflecting cavity having a predetermined reflective surface texture, to produce a reflected light;dispersing at least a portion of the reflected light, using a micro-lenslet array, to produce a first-dispersed light;
dispersing at least a portion of the first-dispersed light, using a concave lens, to produce a second-dispersed light; and
receiving at least a portion of the second-dispersed light, using a collimation reflector, to produce collimated uniform white light. - View Dependent Claims (20, 21, 22, 23, 24, 25)
- emitting light using a plurality of LEDs disposed within a plurality of light-engine cavities;
Specification