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High efficiency vehicle headlights and reflector lamps

  • US 5,660,462 A
  • Filed: 09/13/1994
  • Issued: 08/26/1997
  • Est. Priority Date: 09/13/1994
  • Status: Expired due to Term
First Claim
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1. An incandescent lamp assembly comprising:

  • a reflector defining a cavity, said cavity including a shaped, light-directing surface;

    a lens which closes the cavity of said reflector; and

    an incandescent lamp capsule mounted with in said reflector, said incandescent lamp capsule comprising;

    a hermetically sealed, light-transmissive envelope;

    a fill material including an inert fill gas contained within said envelope;

    at least one filament sealed in said envelope and supported by lead-in-wires; and

    a specularly reflective coating on a portion of said envelope for reflecting radiation emitted by said filament and not directed to the shaped, light-directing surface of said reflector, said envelope, at least in the portion having said reflective coating, having an ellipsoidal shape with a central axis and wherein said filament is located on or near the axis of said ellipsodially-shaped envelope, such that said reflective coating reflects radiation emitted by said filament back to said filament.

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