Faceted optics for illumination devices
First Claim
Patent Images
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.
10 Assignments
0 Petitions
Accused Products
Abstract
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.
49 Citations
25 Claims
-
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, and an 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
-
23. 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; an outer surface comprising a plurality of planar quadrilateral facets having vertices that collectively define a faceted paraboloid, 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, 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 a first end of the optic, opposite a second end of the optic at which the extended light source is disposed, is substantially uniform in brightness and has a beam divergence angle that exceeds a baseline beam divergence by less than 10%. - View Dependent Claims (24)
-
25. An optic for use in conjunction with a plurality of discrete light sources collectively forming an extended light-emitting surface, the optic comprising:
a solid structure formed of a substantially transparent material and defining a truncated paraboloid 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, and a convex lens structure disposed on the exit surface the convex lens structure being centered on an axis of the truncated paraboloid at a length from the second end such that a plurality of rows of facets are disposed on the truncated paraboloid along the length between the second end and the entire convex lens structure; a surface of the truncated paraboloid comprising a plurality of planar quadrilateral facets having vertices that collectively define the truncated paraboloid, and the surface of the convex lens structure being faceted so as to substantially eliminate non-uniformities of the extended light-emitting surface in a beam exiting the solid structure at the exit surface.
Specification