Patent ID: 6698908
Filing Date: 2004-03-02
Classification: F21V

Abstract:
An optical assembly enabling enhanced directional illumination control; said optical assembly comprising:a reflector/refractor; said reflector/refractor having a predefined shape and being formed of a transparent material; and said reflector/refractor having a plurality of reflector/refractor prisms on an exterior body surface extending between an upper flange, opening and a lower flange, opening for reflecting and refracting light; a light source disposed within said reflector/refractor substantially along a central vertical axis of said reflector/refractor; a reflector collar supporting said reflector/refractor and for attaching said reflector/refractor to a luminaire ballast; said reflector collar having a lower portion extending below said upper flange, opening of said reflector/refractor for positioning and supporting said reflector/refractor; said reflector collar having a predetermined contour for generally forming an extension of an interior contour of said reflector/refractor; and a plurality of reflector impressions formed into said predetermined contour; said predetermined contour and said plurality of reflector impressions for providing directional illumination control for the optical assembly; and said plurality of reflector impressions being generally concave and facing said central vertical axis of said light source and being arranged at a predetermined density and at predetermined locations for controlled spreading of reflected light generally away from both said light source and a sidewall of said reflector/refractor and toward said lower opening of said reflector/refractor.