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Double refraction and total reflection solid nonimaging lens

  • US 5,343,330 A
  • Filed: 03/18/1993
  • Issued: 08/30/1994
  • Est. Priority Date: 09/25/1991
  • Status: Expired due to Term
First Claim
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1. A traffic signal light comprising:

  • a plurality of nonimaging lens mounted laterally adjacent to each other; and

    a plurality of light beam sources (a) each producing a directional light beam formed of generally parallel light rays and (b) each associated with one of said nonimaging lens;

    wherein each of said nonimaging lens comprises a solid body of light-propagating material defining;

    a first light-refracting surface receiving the directional light beam of the associated source and having a configuration adapted to cause divergence of the generally parallel light rays of the received light beam by refraction, the divergent light rays propagating within the solid body; and

    a second light-reflecting surface positioned to receive the divergent light rays and having a configuration adapted to reflect said divergent light rays;

    wherein the configuration of said light-refracting surface and the configuration of said light-reflecting surface are selected to redirect the generally parallel light rays from the associated light beam source into an enlarged light beam propagating in a given direction and visible over a given viewing angle.

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