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Imaging system having a blurring optical element for minimizing moire phenomenon

  • US 5,450,243 A
  • Filed: 06/08/1992
  • Issued: 09/12/1995
  • Est. Priority Date: 02/25/1987
  • Status: Expired due to Term
First Claim
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1. An imaging system for minimizing moire phenomenon comprising:

  • an imaging lens unit for forming an image of an object at a predetermined imaging position, said imaging lens unit including an optical element on an optical path from a front end of said imaging lens unit to said predetermined imaging position;

    one of an entrance face and an exit face of said optical element having a surface shape selected from a group consisting of a rotary cylindrical surface and a symmetric cylindrical surface which provides blurring exhibited in one of zonal and annular shapes with respect to said image of said object at said predetermined imaging position.

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