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OPTICAL ELEMENT, EXTENDED OPTICAL ELEMENT COMPRISING OPTICAL ELEMENT, AND LAMP HOUSING

  • US 20170010451A1
  • Filed: 09/22/2016
  • Published: 01/12/2017
  • Est. Priority Date: 03/27/2014
  • Status: Active Grant
First Claim
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1. An optical element comprising:

  • a polygonal column-shaped transparent body which has four inner wall surfaces that surround a rectangular column-shaped space having a square-shaped opening when seen in a plan view, four outer wall surfaces that are respectively parallel to the inner wall surfaces, two outer wall surfaces which are perpendicular to a diagonal line of the square-shaped opening and face each other, and two side wall surfaces that are perpendicularly connected to at least one of the two outer wall surfaces and are connected to at least one of the four outer wall surfaces,wherein, in the transparent body, a distance between the two outer wall surfaces facing each other is longer than the diagonal line, andlight perpendicularly incident on one outer wall surface of the two outer wall surfaces facing each other undergoes repetitive total reflection on the inner wall surfaces and the outer wall surfaces and, finally, exits along almost the same axis as a light axis of light incident through the other outer wall surface of the two outer wall surfaces facing each other.

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