×

Optical element for a light source and lighting system using same

  • US 9,157,602 B2
  • Filed: 05/10/2010
  • Issued: 10/13/2015
  • Est. Priority Date: 05/10/2010
  • Status: Active Grant
First Claim
Patent Images

1. An optical element for a lighting system, the optical element comprising:

  • a flat, annular bottom surface;

    an entry surface comprising at least three subsurfaces including an inverted conic subsurface and a spherical subsurface that joins the flat, annular bottom surface at a normal angle at a first corner, wherein each subsurface is disposed to receive light rays from a light source in a different direction;

    an exit surface opposite the entry surface;

    a Fresnel concentrator lens disposed in or on the exit surface to receive the light rays from the inverted conic subsurface near the center of the exit surface and direct the light rays towards the normal; and

    an outer surface disposed between the exit surface and the flat, annular bottom surface that joins the flat annular bottom surface at a second corner;

    wherein each of the three subsurfaces is shaped and positioned to direct light rays through the optical element so that many light rays exit the optic at a normal angle relative to the exit surface.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×