Hybrid lens for controlled light distribution
First Claim
1. A lens for distribution of light from a light emitter having an emitter axis, the lens comprising an inner surface defining an inner cavity about the emitter axis, the inner surface comprising at least two distinct inner-surface stepwise discontinuities, one formed by a plurality of pairs of transverse inner regions having substantially curved projections on planes orthogonal to the emitter axis and the other formed by a plurality of pairs of transverse inner regions having substantially straight projections on planes orthogonal to the emitter axis.
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0 Petitions
Accused Products
Abstract
A lens for distribution of light predominantly toward a preferential side from a light emitter having an emitter axis. The lens has a faceted output region, a smooth output surface and at least one reflective surface which reflects light through total-internal-reflection (TIR) toward the faceted output region. The faceted output region is formed by pairs of transverse surfaces each surface of which redirects the received light to provide a composite illuminance pattern. The lens may further have faceted input surfaces at least partially defining a light-input cavity about the emitter axis. The faceted input region is formed by pairs of transverse surfaces each surface of which redirects the received light.
179 Citations
32 Claims
- 1. A lens for distribution of light from a light emitter having an emitter axis, the lens comprising an inner surface defining an inner cavity about the emitter axis, the inner surface comprising at least two distinct inner-surface stepwise discontinuities, one formed by a plurality of pairs of transverse inner regions having substantially curved projections on planes orthogonal to the emitter axis and the other formed by a plurality of pairs of transverse inner regions having substantially straight projections on planes orthogonal to the emitter axis.
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13. A lens for distribution of light from a light emitter having an emitter axis, the lens comprising:
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an inner surface defining an inner cavity about the emitter axis, the inner surface comprising inner-surface stepwise discontinuities formed by a plurality of transverse inner regions each redirecting light received from the emitter; a secondary surface offset from the inner surface, the secondary surface being configured for total internal reflection (TIR) of light received from the inner surface the secondary surface comprising a plurality of transverse reflecting regions forming reflecting stepwise discontinuities; and an outer surface receiving redirected emitter light and comprising outer-surface stepwise discontinuities formed by a plurality of transverse outer regions each redirecting the received light. - View Dependent Claims (14)
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15. A lens for distribution of light from a light emitter having an emitter axis, the lens comprising:
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an inner surface defining an inner cavity about the emitter axis, the inner surface comprising inner-surface stepwise discontinuities formed by a plurality of pairs of transverse inner regions with intersection regions therebetween, each of the transverse inner regions redirecting light received from the emitter; and at least two secondary surface portions spaced apart and extending along opposite sides of the inner surface transversely to the intersection regions of the inner-surface stepwise discontinuities, the secondary surface portions being configured for total internal reflection (TIR) of light received from the inner surface. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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- 22. An LED light fixture comprising a heat-sink structure having a mounting surface supporting an LED arrangement which comprises plurality of spaced apart LED light sources and a plurality of lenses each optically coupled with a corresponding one of the light sources, the lens comprising an outer light-output surface and an inner light-input surface which defines an inner cavity about the emitter axis, the inner surface comprising at least two sets of distinct inner-surface stepwise discontinuities each formed by a plurality of pairs of transverse inner surfaces with intersection regions therebetween, the intersection regions of at least one of the sets having curved projections, and at least one other of the sets having substantially straight projections, the projections being on planes orthogonal to the emitter axis.
- 25. A lens for distribution of light from a light emitter having an emitter axis, the lens comprising at least two distinct sets of faceted input regions each passing received light therethrough and each being formed by a plurality of pairs of adjacent transverse surfaces extending to elongate adjoining regions, at least one set of the elongate adjoining regions having curved projections, and at least one other set having substantially straight projections, the projections being on planes orthogonal to the emitter axis.
Specification