Vehicular vision system with a wide angle lens including a diffractive element

  • US 6,201,642 B1
  • Filed: 07/27/1999
  • Issued: 03/13/2001
  • Est. Priority Date: 07/27/1999
  • Status: Expired due to Fees
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First Claim
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1. A vehicular vision system for displaying scenic information of an area exteriorly of a vehicle on a display system, said vision system comprising:

  • a focusing lens having a receiving end and a focusing end, said receiving end being opposite said focusing end;

    a wide angle lens positioned adjacent to said receiving end of said focusing lens, said wide angle lens directing a virtual image of a wide angle field of view of a scene exteriorly of the vehicle toward said receiving end of said focusing lens, said wide angle lens including an outer negative optic and an inner negative optic, said inner negative optic being positioned between said outer negative optic and said receiving end of said focusing lens, said wide angle lens including a diffractive element, wherein said outer negative optic has an outer curved surface having a radius of curvature in a first range and an inner curved surface having a radius of curvature in a second range, wherein said first range is approximately 95.67 mm and said second range is approximately 30.00 mm;

    an image capture device which is adapted to receive an image refracted through said focusing lens, said virtual image of said wide angle field of view being focused by said focusing lens on said image capture device; and

    a display system which displays an image in response to an output of said image capture device.

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