LENS WITH CONTROLLED BACKLIGHT MANAGEMENT
First Claim
1. A lens for distribution of light predominantly toward a preferential side from a light emitter having an emitter axis and defining an emitter plane, comprising:
- an emitter-adjacent base end forming an emitter-receiving opening to an emitter-surrounding cavity defined by an inner surface including (a) a front sector centered on the preferential side and having a first configuration for refracting light from the emitter and (b) a back sector centered on the non-preferential side radially opposite the preferential side and having a second configuration for refracting light from the emitter, the second configuration differing from the first configuration; and
an axially-offset primary back surface positioned to receive light from at least a portion of the inner-surface back sector and configured for total internal reflection (TIR) thereof.
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Abstract
A lens for distribution of light predominantly toward a preferential side from a light emitter having an emitter axis and defining an emitter plane. The lens has an emitter-adjacent base end forming an emitter-receiving opening to an emitter-surrounding cavity defined by an inner surface which includes a front sector centered on the preferential side and a back sector centered on the non-preferential side radially opposite the preferential side. The front and back sectors differ in their respective configurations for refracting light from the emitter. The lens further includes an primary back surface positioned to receive light from at least a portion of the inner-surface back sector and configured for total internal reflection (TIR) thereof. The inner-surface back sector and the primary back surface extend along substantially elliptical cross-sections in planes substantially parallel to the emitter plane. The emitter-adjacent base end forms a back opening to a back cavity substantially centered on the non-preferential side and partially bounded by the primary back surface.
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Citations
26 Claims
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1. A lens for distribution of light predominantly toward a preferential side from a light emitter having an emitter axis and defining an emitter plane, comprising:
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an emitter-adjacent base end forming an emitter-receiving opening to an emitter-surrounding cavity defined by an inner surface including (a) a front sector centered on the preferential side and having a first configuration for refracting light from the emitter and (b) a back sector centered on the non-preferential side radially opposite the preferential side and having a second configuration for refracting light from the emitter, the second configuration differing from the first configuration; and an axially-offset primary back surface positioned to receive light from at least a portion of the inner-surface back sector and configured for total internal reflection (TIR) thereof. - 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)
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24. A lens for distribution of light predominantly toward a preferential side from a light emitter having an emitter axis and defining an emitter plane, comprising an emitter-adjacent base end forming:
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an emitter-receiving opening to an emitter-surrounding cavity defined by an inner surface which is configured for refracting light from the emitter and includes (a) a front sector centered on the preferential side and (b) a back sector centered on the non-preferential side radially opposite the preferential side; and a back opening to a back cavity partially bounded by a primary back surface positioned to receive light from at least a portion of the inner-surface back sector and configured for total internal reflection (TIR) thereof. - View Dependent Claims (25)
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26. A lens for distribution of light predominantly toward a preferential side from a light emitter having an emitter axis and defining an emitter plane, comprising:
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an emitter-adjacent base end forming an emitter-receiving opening to an emitter-surrounding cavity defined by an inner surface which is configured for refracting light from the emitter and includes (a) a front sector centered on the preferential side and (b) a back sector centered on the non-preferential side radially opposite the preferential side and having substantially elliptical cross-sections in planes substantially parallel to the emitter plane; and a primary back surface positioned to receive light from at least a portion of the inner-surface back sector and configured for total internal reflection (TIR) thereof, the primary back surface having substantially elliptical cross-sections in planes substantially parallel to the emitter plane.
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Specification