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Illumination for inspecting surfaces of articles

  • US 6,437,312 B1
  • Filed: 05/05/2000
  • Issued: 08/20/2002
  • Est. Priority Date: 08/05/1999
  • Status: Expired due to Fees
First Claim
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1. An illumination system comprising:

  • a light source arranged to illuminate an object;

    a plurality of lenses each lens in said plurality of lenses imaging light from said light source reflected by a portion of said object among a plurality of at least partially overlapping portions onto a light receiver among a plurality of light receivers, the physical sizes of the plurality of lenses and the spacing of the plurality of light receivers being such that the plurality of lenses cannot all lie in a single plane;

    folding optics arranged along a light path associated with at least one lens and a respective at least one light receiver among said plurality of lenses and said plurality of light receivers, the arrangement of said folding optics, said plurality of lenses and said plurality of light receivers being such that the respective lengths of light paths between said ones of said plurality of lenses and said corresponding ones of said plurality of light receivers are substantially identical.

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