Patent ID: 7841748
Filing Date: 2010-11-30
Classification: F21V,F21W,F21Y

Abstract:
1. A lighting diffractor-diffuser system comprising: a lighting diffractor comprising a light-transmissive shell having an inner surface and an outer surface, the shell having a cross-sectional profile comprising a first parabolic segment positioned toward a top portion of the diffractor, a second parabolic segment positioned at an intermediate portion of the diffractor, and a third parabolic segment positioned toward a lower rim portion of the diffractor; and a diffuser comprising a fresnel lens portion and an angled flange surrounding the fresnel lens portion, the angled flange of the diffuser being attached to the lower rim portion of the diffractor; wherein the angled flange comprises a plurality of longitudinal facets, each of said longitudinal facets having an included angle of between 70°-90°.