US Patent No. 10,466,404

COLLIMATING ON-DIE OPTIC


Patent No. 10,466,404
Issue Date November 05, 2019
Title Collimating On-die Optic
Inventorship Pascal Bloemen, Eindhoven (NL)
Maarten van-Lierop, Eindhoven (NL)
Rick Nijkamp, Eindhoven (NL)
Mark Steltenpool, Eindhoven (NL)
Hugo Cornelissen, Eindhoven (NL)
Assignee LUMILEDS LLC, San Jose, CA (US)

Claim of US Patent No. 10,466,404

1. An optic, comprising:an input face;
a lower exterior surface defined by a parabolic segment rotated about an axis of symmetry, the parabolic segment comprising a part of a parabola with an optical axis tilted away from the axis of symmetry when travelling upward along the optical axis, wherein a bottom end of the lower exterior surface joins a perimeter of the input face;
an upper exterior surface above the lower exterior surface, the upper exterior surface being defined by a line rotated about the axis of symmetry, the line being tilted away from the axis of symmetry when travelling upward along the line; an intermediate surface comprising an annulus, the annulus having an outer circumference that joins an upper end of the lower exterior surface and an inner circumference that joins a lower end of the upper exterior surface; and
an interior conical surface surrounded by the lower and the upper exterior surfaces, the interior conical surface being defined by a smooth curve rotated about the axis of symmetry, at least a majority of the smooth curve turning away from the axis of symmetry when travelling upward along the smooth curve, wherein:
the interior conical surface has a vertex located at the axis of symmetry and within the lower exterior surface; and
top ends of the interior conical surface and the upper exterior surface join to define an output aperture.