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Spot TIR lens system for small high-power emitter

  • US 8,858,022 B2
  • Filed: 05/03/2012
  • Issued: 10/14/2014
  • Est. Priority Date: 05/05/2011
  • Status: Active Grant
First Claim
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1. A lamp, comprising:

  • a single emitter structure having a substrate with 25 or more light-emitting diodes (LEDs) arranged thereon and a power rating of 80 Watts or more;

    a total-internal-reflection (TIR) lens, the lens including;

    an optical body member having a substantially straight interior open channel in a lower portion thereof, the interior open channel having a lower opening for accommodating the single emitter structure;

    the optical body member having a step-shaped upper surface defining an increasingly wider cavity extending from an interior portion to an upper opening in of the optical body; and

    a plurality of refractive surface regions disposed on the step-shaped upper surface of the optical body; and

    a holder having a concave interior surface shaped to accommodate the optical body member and a convex exterior surface, the holder having a first opening disposed to surround the lower opening of the optical body member and a second opening opposite the first opening, wherein the optical body member is insertable into the holder through the second opening, the holder further including;

    a plurality of tabs disposed along an inside rim of the holder and configured for radial compression fit with a flange of the lens;

    a finger-width sized cut-out; and

    three or more support members disposed surrounding the first opening of the holder and configured for centering the optical body member with respect to the single emitter structure.

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