Lens with controlled light refraction

摘要

A lens for distribution of light from a light emitter having an emitter axis and defining an emitter plane. The lens including an emitter-adjacent base end forming an opening to an inner cavity surrounding the emitter. An inner-cavity surface includes an axis-adjacent first inner region configured for refracting emitter light rays away from the axis, a second inner region spaced from the first inner region and configured for refracting emitter light rays toward the axis, and a middle inner region joining and substantially cross-sectionally asymptotical to the first and second inner regions. The middle inner region is positioned with respect to the emitter to refract light away from the axis by progressively lesser amounts at positions progressively closer to the second inner region. The lens further has an outer surface including output regions each configured for refracting the light from a corresponding one of the inner regions such that at the outer surface light from each inner region is refracted substantially without overlapping light from the other inner regions.

主权项

1. A lens for distribution of light from a light emitter having an emitter axis, comprising:
a base end forming an opening to an inner cavity and defining a base plane configured for positioning substantially orthogonally to the emitter axis; an inner-cavity surface including (a) a substantially cross-sectionally concave axis-adjacent first inner region, (b) a substantially cross-sectionally convex second inner region spaced from the first inner region, and (c) a substantially cross-sectionally linear middle inner region joining the cross-sectionally concave and cross-sectionally convex regions, thereby a substantial portion of the inner cavity surface being of a truncated conical shape between the first and second inner regions; and a refracting outer surface.