Nano-Structured Lens for Collimating Light from Surface Emitters
First Claim
1. A light source for providing light, comprising:
- a light emitting layer; and
a first lens comprising a periodic structure therein that is periodic along at least one direction in a plane, said structure formed from at least two optically transparent materials of different optical indices, wherein said first lens is separated from the light emitting layer, and the radiation propagating from the light emitting layer within an angle to a line normal to the plane will be transmitted by the first lens to a far field in an index-guided mode, the separation between the light emitting layer and the lens being such that near field radiation propagating from the light emitting layer towards the lens not within said angle to the line will be scattered and redirected by the first lens to the far field to thereby collimate the radiation propagating from the light emitting layer to the far field.
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Accused Products
Abstract
A light source for providing light comprises a light emitting layer and a lens comprising a periodic structure therein that is periodic along at least one direction in a plane. The structure includes or is formed from at least two optically transparent materials of different optical indices. The lens is separated from the light emitting layer, and the radiation propagating from the light emitting layer within an angle to a line normal to the plane will be transmitted by the lens to a far field in an index-guided mode. The separation between the light emitting layer and the lens is such that near field radiation propagating from the light emitting layer towards the lens not within said angle to the line will be scattered and redirected by the first lens to the far field to thereby collimate the radiation propagating from the light emitting layer to the far field.
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Citations
30 Claims
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1. A light source for providing light, comprising:
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a light emitting layer; and a first lens comprising a periodic structure therein that is periodic along at least one direction in a plane, said structure formed from at least two optically transparent materials of different optical indices, wherein said first lens is separated from the light emitting layer, and the radiation propagating from the light emitting layer within an angle to a line normal to the plane will be transmitted by the first lens to a far field in an index-guided mode, the separation between the light emitting layer and the lens being such that near field radiation propagating from the light emitting layer towards the lens not within said angle to the line will be scattered and redirected by the first lens to the far field to thereby collimate the radiation propagating from the light emitting layer to the far field. - 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)
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28. A light source for providing light, comprising:
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a light emitting layer; and a lens comprising a second layer with a periodic structure therein that is periodic along at least one direction in a plane, said structure comprising at least two optically transparent materials of different optical indices, wherein the radiation propagating from the light emitting layer within an angle to a line normal to the plane will be transmitted by the second layer to a far field in an index-guided mode, and near field radiation propagating from the light emitting layer towards the second layer not within said angle to the line will be scattered and redirected by the lens to the far field to thereby collimate the radiation propagating from the light emitting layer to the far field.
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29. A method for collimating light to a far field, comprising:
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providing a first layer with a periodic structure therein that is periodic along at least one direction in a plane, said structure comprising at least two optically transparent materials of different optical indices; and propagating radiation towards the first layer, so that the radiation propagating within an angle to a line normal to the plane towards the first layer will be transmitted by the first layer to the far field in an index-guided mode, and near field radiation propagating not within said angle to the line towards the first layer will be scattered and redirected by the first layer to the far field to thereby collimate the near field radiation to the far field. - View Dependent Claims (30)
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Specification