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Fresnel lens spotlight with coupled variation of the spacing of lighting elements

  • US 20050168995A1
  • Filed: 12/22/2004
  • Published: 08/04/2005
  • Est. Priority Date: 12/22/2003
  • Status: Abandoned Application
First Claim
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1. A Fresnel lens spotlight having an emitted light beam with an adjustable aperture angle, comprising:

  • a reflector, a lamp; and

    at least one Fresnel lens having a negative focal length that defines a virtual focal point.

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