Lens with inner-cavity surface shaped for controlled light refraction

摘要

A lens for distribution of light from a light emitter having an emitter axis. The lens includes an inner surface defining an inner cavity and including a substantially cross-sectionally convex inner region along an open end of the inner cavity and a substantially cross-sectionally linear inner region joining the substantially cross-sectionally convex inner region and extending therefrom toward the emitter axis. The convex region is configured for refracting emitter light rays toward the emitter axis. The lens further includes an outer surface receiving the light from each of the inner regions. A lens flange surrounds the lens and has an outer flange surface extending radially outwardly from the lens outer surface at positions axially spaced from the light emitter. The convex inner region is configured to refract emitter light to the outer surface such that the outer flange surface is substantially free from receiving any emitter light.

主权项

1. A lens for distribution of light from a light emitter having an emitter axis, comprising:
an inner refracting surface defining an inner cavity and including a cross-sectionally convex inner region forming an open end of the inner cavity and a substantial portion of the inner-cavity surface, the convex region being configured for refracting emitter light rays toward the emitter axis, and another substantial portion of the inner-cavity surface being of a conical shape formed by a substantially cross-sectionally linear inner region joining the substantially cross-sectionally convex inner region and extending therefrom toward the emitter axis; and an outer surface receiving the light from each of the inner regions.