LED devices for offset wide beam generation

摘要

A light source is combined with an optic and a reflector. Light incident onto to the reflector is reflected with a single reflection. The reflector occupies a portion of a solid angle around the light source to the exclusion of the optic at least with respect to any optical function. The reflector directly receives a second portion of light. The optic occupies substantially all of the remaining portion of the predetermined solid angle to directly receive a first portion of light from the light source. A reflected beam from the reflector is reflected into a predetermined reflection pattern. The inner and/or outer surface of the optic is shaped to refract or direct light which is directly transmitted into the optic from the light source from a first portion of light and/or reflected into the optic from the reflector from the reflected beam into a predetermined beam.

主权项

1. A luminaire comprising:
a housing comprising an area that is operative to emit light towards an area to be illuminated; and a plurality of arrays of light sources, each array mounted to a respective substrate, the substrates mounted adjacent one another at the area of the housing, wherein each light source comprises:
at least one light emitting diode;an optic covering the at least one light emitting diode and comprising:
a base that extends peripherally with respect to the at least one light emitting diode and that is flat in a first dimension and in a second dimension, the first and second dimensions perpendicular to one another; andan environmentally exposed exterior surface that protects the at least one light emitting diode from environmental exposure and that has a debris shedding smooth shape, the debris shedding smooth shape adjoining the base, extending peripherally about the at least one light emitting diode, and extending fully over the at least one light emitting diode in the first dimension and in the second dimension to cover the at least one diode fully, wherein the debris shedding smooth shape is free from projections and abrupt changes in form to provide a smooth surface resistant to accumulation or collection of dust, dirt, debris, or optically occluding material from an environment; anda mirror disposed between the environmentally exposed exterior surface and the at least one light emitting diode.