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Method and apparatus for light redistribution by internal reflection

  • US 6,739,738 B1
  • Filed: 01/28/2003
  • Issued: 05/25/2004
  • Est. Priority Date: 01/28/2003
  • Status: Active Grant
First Claim
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1. A method for redistributing light by internal reflection within a lens comprising the steps of:

  • receiving divergent light from a light source into a lens, said light source having an optical axis and a generally symmetrical light radiation pattern;

    converting the divergent light into generally collimated light within the lens by internal reflection, said generally collimated light symmetrically distributed about said optical axis and having a first direction generally parallel to said optical axis;

    diverting a first portion of said generally collimated light from said first direction to a second direction by internal reflection within the lens, while permitting a second portion of said generally collimated light to continue in said first direction;

    redirecting said first portion from said second direction to a third direction by internal reflection within the lens, said third direction being generally parallel to said first direction, whereby said first portion is emitted from the lens at a position radially displaced from said second portion and the optical axis of the light source.

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