Reflector/refractor

  • US 4,839,781 A
  • Filed: 06/21/1988
  • Issued: 06/13/1989
  • Est. Priority Date: 04/13/1988
  • Status: Expired due to Term
First Claim
Patent Images

1. A reflector/refractor device used with a lighting fixture comprising:

  • a body having a predetermined profile, said body having an outside surface and an inside surface and defining a cavity;

    illuminating means for emitting light disposed within said cavity substantially along a central vertical axis of said body; and

    said body including a series of sectional zones defining said predetermined profile for selectively providing a variable predetermined light distribution pattern determined by a vertical location of said illuminating means, said sectional zones including;

    one or more zones having a plurality of substantially vertical prism means formed on said outside surface for reflecting a first portion of the emitted light substantially unaffected by the vertical location of said illuminating means;

    at least one sectional zone including a plurality of prism means for selectively varying component proportions of refracted and reflected light portions responsive to a change in an incident angle of the emitted light, said incident angle being selectively variable by the vertical location of said illuminating means, said refracted light component portion having an increased magnitude responsive to a decreased incident angle of the emitted light and said reflected light component portion having a decreased magnitude responsive to a decreased incident angle of the emitted light.

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