Faceted optics for illumination devices

摘要

Faceted optics for use in conjunction with (typically planar) arrangements of discrete light sources (e.g., an array of multiple LED dies) improve or optimize the trade-off between beam divergence and beam non-uniformity, and between non-uniformities resulting from the imaging of the extended light source and artifacts introduced by the optic itself.

主权项

1. An optic for use in conjunction with an extended light source comprising a plurality of discrete light sources, the optic comprising:
a solid paraboloid structure formed of a substantially transparent material and having:
a first end comprising an exit surface at which a light beam generated by the plurality of discrete light sources exits the optic and a second end at which the plurality of discrete light sources are disposed, andan outer surface comprising a plurality of planar quadrilateral facets;a convex lens structure disposed on the exit surface of the solid paraboloid structure, the convex lens structure being centered on an axis of the solid paraboloid structure at a length from the second end such that a plurality of rows of facets are disposed on the solid paraboloid structure along the length between the second end and the entire convex lens structure;wherein the facets are sized and arranged such that a light beam exiting the first end of the optic, is substantially free of images of the discrete light sources and artifacts resulting from faceting.