Method and system for managing light from a light emitting diode
First Claim
1. An illumination system comprising:
- a light emitting diode comprising;
a substrate; and
a light emitting region that is associated with the substrate, wherein a reference plane that projects away from the substrate sections the light emitting region into a first section disposed on a first side of the reference plane and a second section disposed on a second side of the reference plane; and
an optic comprising a first surface forming a cavity that faces towards the light emitting diode and a second surface, opposite the cavity, that faces away from the light emitting diode,wherein the second surface comprises a first surface region disposed on the first side of the reference plane and a second surface region disposed on the second side of the reference plane, andwherein the second surface region is patterned with retroreflectors operative to reflect light across the reference plane and through the first surface region.
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Accused Products
Abstract
A light source, for example a light emitting diode, can emit light and have an associated optical axis. The source can be deployed in applications where it is desirable to have illumination biased laterally relative to the optical axis, such as in a street luminaire where directing light towards a street is beneficial. The source can be coupled to an optic that comprises an inner surface facing the source and an outer surface that is opposite the inner surface. The inner surface can comprise a refractive surface that receives light headed away from the optical axis of the light source, for example opposite the street. The refractive surface can form the received light into a beam. The outer surface of the optic can reflect the beam back across the optical axis, for example so that light headed away from the street is redirected towards the street.
169 Citations
20 Claims
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1. An illumination system comprising:
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a light emitting diode comprising; a substrate; and a light emitting region that is associated with the substrate, wherein a reference plane that projects away from the substrate sections the light emitting region into a first section disposed on a first side of the reference plane and a second section disposed on a second side of the reference plane; and an optic comprising a first surface forming a cavity that faces towards the light emitting diode and a second surface, opposite the cavity, that faces away from the light emitting diode, wherein the second surface comprises a first surface region disposed on the first side of the reference plane and a second surface region disposed on the second side of the reference plane, and wherein the second surface region is patterned with retroreflectors operative to reflect light across the reference plane and through the first surface region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An illumination system comprising:
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a light emitting diode comprising a substrate, wherein a reference plane that is substantially normal to the substrate sections the light emitting diode into a first section disposed on a first side of the reference plane and a second section disposed on a second side of the reference plane; and an optic comprising a first surface forming a cavity that faces towards the light emitting diode and a second surface, opposite the cavity, that faces away from the light emitting diode, wherein the second surface comprises a first surface region disposed on the first side of the reference plane and a second surface region disposed on the second side of the reference plane, and wherein the second surface region is patterned with reflective features operative to reflect light across the reference plane and through the first surface region. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. An illumination system comprising:
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a light emitting diode that has an optical axis and that emits light rays; and an optic comprising a first surface that is oriented towards the light emitting diode and a second surface that is oriented away from the light emitting diode, wherein the second surface comprises a first surface region disposed on a first side of the optical axis and a second surface region disposed on a second side of the optical axis, and wherein the second surface region is patterned with features, wherein the emitted light rays comprise incident light rays that are incident upon the features, wherein the features are operative to process the incident light rays to form redirected light rays, and wherein said incident light rays are substantially parallel to said redirected light rays when viewed from a perspective of looking down the optical axis towards the light emitting diode. - View Dependent Claims (18, 19, 20)
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Specification