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Light delivery systems and applications thereof

  • US 6,739,744 B2
  • Filed: 08/23/2001
  • Issued: 05/25/2004
  • Est. Priority Date: 07/02/1997
  • Status: Expired due to Term
First Claim
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1. A lighting device comprising an optic light guide for receiving light from a light source and propagating light therethrough via internal reflection, said light guide having a free end that emits directional light, and a sleeve surrounding said free end, said sleeve having an aperture axially outwardly spaced from said free end through which a beam of light from said free end passes, said sleeve being selectively axially movable in and out relative to said free end prior to and during use of the device to vary the distance between said aperture and said free end to vary the size of the beam of light passing through said aperture.

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