Lens with TIR for off-axial light distribution
First Claim
1. A lens for directing light from a light emitter in a preferential-side off-axial direction with respect to the emitter axis, comprising:
- an emitter-adjacent base end forming an opening around the emitter axis;
an inner surface defining a void with a surrounding lateral surface formed about the emitter axis and extending from the opening to terminate at an end surface which has a substantially planar portion extending from the preferential side at least to near the emitter axis and extends away from the base end to a position farthest therefrom to meet the surrounding lateral surface across from the preferential side;
an output-end surface transverse the emitter axis; and
a total internal reflection (TIR) surface radially beyond the void and configured for directing light received from the inner surface of the void toward the output-end surface,whereby light from the emitter exits the output-end surface predominantly toward the preferential side.
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Accused Products
Abstract
A lens for directing light from a light emitter in a preferential-side off-axial direction with respect to the emitter axis. The lens includes an emitter-adjacent base end forming an opening, an inner surface extending from the base end and forming a void, an output-end surface configured to direct light toward the preferential side, and an outer lateral surface configured for TIR to direct light toward the output-end surface, whereby substantially all light from the emitter exits the output-surface predominantly toward the preferential side. Another aspect of this invention is a recessed lighting fixture utilizing the inventive lens.
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Citations
21 Claims
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1. A lens for directing light from a light emitter in a preferential-side off-axial direction with respect to the emitter axis, comprising:
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an emitter-adjacent base end forming an opening around the emitter axis; an inner surface defining a void with a surrounding lateral surface formed about the emitter axis and extending from the opening to terminate at an end surface which has a substantially planar portion extending from the preferential side at least to near the emitter axis and extends away from the base end to a position farthest therefrom to meet the surrounding lateral surface across from the preferential side; an output-end surface transverse the emitter axis; and a total internal reflection (TIR) surface radially beyond the void and configured for directing light received from the inner surface of the void toward the output-end surface, whereby light from the emitter exits the output-end surface predominantly toward the preferential side. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A lens for directing light from a light emitter in a preferential-side off-axial direction with respect to the emitter axis, comprising:
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an emitter-adjacent base end forming an opening around the emitter axis; an inner surface extending from the opening and defining a void terminating with an end surface which is configured to direct light from the emitter toward the preferential side and extends from the preferential side away from the base end across from the preferential side, the end surface having a substantially planar portion extending from the preferential side at least to near the emitter axis; an output-end surface; and a lateral surface radially beyond the void and configured for directing light received from the inner surface toward the output-end surface, whereby light from the emitter exits the output-end surface predominantly toward the preferential side. - View Dependent Claims (13, 14)
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15. A lens for directing light from a light emitter in a preferential-side off-axial direction with respect to the emitter axis, comprising:
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an emitter-adjacent base end forming an opening around the emitter axis ; an inner surface extending from the opening and defining a void; an output-end surface transverse the emitter axis; and a total internal reflection (TIR) surface configured for directing light received from the inner surface toward the output-end surface, the TIR surface extending from the base end around the inner surface to terminate proximal to the output-end surface at distances from the emitter axis which are greatest on the preferential side and gradually decrease around the inner surface toward the non-preferential side, whereby light from the emitter exits the output-end surface predominantly toward the preferential side. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification