Reflector with concentric interrupted reflecting surfaces

An optical assembly for use in conjunction with an LED light source having an optical axis Ao centered on an area of light emission from which light is emitted in a hemispherical emission pattern surrounding said optical axis Ao, said light is emitted to one side of a first plane P1 coincident with said LED light source and perpendicular to said optical axis Ao, said reflector comprising:

• an inner reflecting surface and an outer reflecting surface, said inner reflecting surface defined by a curve of a parabola having a focus at said LED light source rotated about said optical axis Ao extending from an inner end at said first plane P1 to an outer end and having a plurality of windows arranged opposite one another along a longitudinal axis AL, said windows extending from said first plane P1 to a height spaced from said first plane P1, said inner reflecting surface being an uninterrupted surface of rotation from said height to said outer end, and said outer reflecting surface comprising a pair of arcuate segments centered on said longitudinal axis AL and separated by supporting members, said windows and said arcuate segments each having an arcuate extent defined between said supporting members, each arcuate segment defined by a curve of a parabola having a focus at said LED light source rotated about said optical axis Ao, each said segment extending from a first end spaced a first distance from said first plane P1 to a second end at a second distance from said first plane P1, said second distance being greater than said first distance and less than a height of said inner reflecting surface;
• and
• a lens centered on said optical axis Ao and defined by a light entry surface and a light emission surface;
• wherein said windows are configured to allow light to reflect on said outer reflecting surface, and wherein said light entry surface, said inner reflecting surface, and said outer reflecting surfaces are configured to cooperate to redirect light rays divergent from said optical axis Ao into a direction substantially parallel with said optical axis Ao.

A reflector for use in conjunction with an LED light source having an optical axis Ao centered on an area of light emission from which light is emitted in a hemispherical emission pattern surrounding said optical axis Ao, said light is emitted to one side of a first plane P1 coincident with said LED light source and perpendicular to said optical axis Ao, said reflector comprising:

• an inner reflecting surface and an outer reflecting surface arranged along a longitudinal axis AL, said inner reflecting surface defined by a curve rotated about said optical axis Ao, said inner reflecting surface extending from said first plane P1 to an outer end and defining a pair of windows arranged opposite one another and centered on the longitudinal axis AL, said windows extending between radially oriented edges of a pair of supporting members, said radially oriented edges oriented at an angle α relative to the longitudinal axis AL, and said outer reflecting surface defined by a curve rotated about said optical axis Ao, said outer reflecting surface comprising a pair of arcuate segments interrupted by said supporting members, said arcuate segments centered on the longitudinal axis AL and extending between ends defined by said supporting members at an angle β relative to the longitudinal axis AL, said supporting members occupying a space between the arcuate segments, said outer reflecting surface extending along optical axis Ao from a first end to a second end;
• wherein said inner and outer reflecting surfaces consist essentially of coaxial surfaces of revolution, said angle β is greater than said angle α, said windows are configured to allow light to pass said inner reflecting surface and be reflected by said outer reflecting surface, and wherein said inner reflecting surface and said outer reflecting surfaces are configured to cooperate to redirect light rays divergent from said optical axis Ao into a direction substantially parallel with said optical axis Ao.