LED lens
First Claim
1. A lens for distribution of light from a light emitter having an emitter axis, comprising:
- an inner surface defining an inner cavity about the emitter axis; and
a total internal reflection (TIR) surface partially bounding a secondary cavity which is offset from the inner cavity with an intermediate surface therebetween, the intermediate surface including front and rear edges with a pair of side edges therebetween, the TIR surface extending from the rear edge of the intermediate surface the TIR surface and being centered substantially on a non-preferential side outwardly of and around the inner surface and positioned and configured for total internal reflection of light received from the inner surface toward a preferential side, the TIR surface comprising at least one recessed region extending away from the light emitter.
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Accused Products
Abstract
A lens for distribution of light from a light emitter having an emitter axis. The lens includes an outer surface and a total internal reflection (TIR) surface positioned outwardly of and around the emitter such that light received by the TIR surface is totally internally reflected toward the outer surface. The TIR surface has at least one recessed region extending away from the light emitter, thereby to increase amount of TIR and facilitate lateral diffusion of highest-intensity light in the middle of the light distribution. The lens may further include a base surface adjacent the emitter and an inner surface defining an inner cavity about the emitter axis. In such embodiments, the TIR is positioned and configured for total internal reflection of light received from the inner surface.
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Citations
47 Claims
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1. A lens for distribution of light from a light emitter having an emitter axis, comprising:
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an inner surface defining an inner cavity about the emitter axis; and a total internal reflection (TIR) surface partially bounding a secondary cavity which is offset from the inner cavity with an intermediate surface therebetween, the intermediate surface including front and rear edges with a pair of side edges therebetween, the TIR surface extending from the rear edge of the intermediate surface the TIR surface and being centered substantially on a non-preferential side outwardly of and around the inner surface and positioned and configured for total internal reflection of light received from the inner surface toward a preferential side, the TIR surface comprising at least one recessed region extending away from the light emitter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A lens for distribution of light from a light emitter having an emitter axis, comprising:
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an inner surface defining an inner cavity about the emitter axis; a total internal reflection (TIR) surface partially bounding a secondary cavity outwardly of and around the inner surface and positioned and configured for total internal reflection of light received from the inner surface, the TIR surface comprising at least one recessed region extending away from the light emitter; and an outer surface comprising a non-convex region substantially over the TIR surface and configured to further refract light received from the TIR surface. - View Dependent Claims (14)
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15. A lens for distribution of light from a light emitter having an emitter axis, comprising:
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an outer surface configured for refracting emitter light predominantly toward the preferential side; a total internal reflection (TIR) surface positioned outwardly of and around the emitter such that light received by the TIR surface is totally internally reflected toward the outer surface, the TIR surface comprising at least one recessed region extending away from the light emitter; and a non-convex region of the outer surface substantially over the TIR surface along the emitter axis and configured to further refract light received from the TIR surface. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. A lens for distribution of light from a light emitter having an emitter axis, comprising:
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an outer surface; an inner surface defining an inner cavity about the emitter axis; and a total internal reflection (TIR) surface partially bounding a secondary cavity which is offset from the inner cavity and centered substantially on a non-preferential side, the TIR surface being positioned outwardly of and around the emitter such that light received by the TIR surface is totally internally reflected toward a preferential side, the TIR surface comprising at least one recessed region extending away from the light emitter, the secondary cavity being offset from the inner cavity with an intermediate surface therebetween, the intermediate surface including front and rear edges with a pair of side edges therebetween, the TIR surface extending from the rear edge of the intermediate surface, the rear edge of the intermediate surface being shaped by at least two convex edge portions each extending from the respective side edge toward a front-to-rear centerline and inwardly toward the emitter axis, thereby forming a recessed edge portion on the centerline. - View Dependent Claims (39, 40, 41, 42)
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43. A light fixture comprising:
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a heat-sink structure having a mounting surface; a circuit board on the mounting surface and having a plurality of light emitters spaced thereon; and an optical member over the circuit board and having a plurality of lenses each in alignment with a corresponding one of the emitters, each lens comprising an outer surface and a total internal reflection (TIR) surface positioned outwardly of and around the emitter such that light received by the TIR surface is totally internally reflected toward the outer surface, the TIR surface comprising at least one recessed region extending away from the light emitter, the outer surface being configured for refracting emitter light predominantly toward a preferential side and comprising a non-convex region which is substantially over the TIR surface along the emitter axis and is configured to refract light received from the TIR surface. - View Dependent Claims (44)
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45. A light fixture comprising:
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a heat-sink structure having a mounting surface; a circuit board on the mounting surface and having a plurality of light emitters spaced thereon; an optical member over the circuit board and having a plurality of lenses each in alignment with a corresponding one of the emitters, each lens comprising an outer surface, a refracting inner surface and a total internal reflection (TIR) surface positioned outwardly of and around the refracting inner surface being configured for refracting light from the light emitter predominantly toward a preferential side, the refracting inner surface defining an inner cavity about the emitter axis, the TIR surface partially bounding a secondary cavity which is offset from the inner cavity and comprising at least one recessed region extending away from the light emitter. - View Dependent Claims (46, 47)
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Specification