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Imaging system with enlarged depth of field

  • US 4,404,594 A
  • Filed: 11/02/1981
  • Issued: 09/13/1983
  • Est. Priority Date: 11/02/1981
  • Status: Expired due to Fees
First Claim
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1. An imaging system with an enlarged depth of field for use with a means for focusing an image, said imaging system comprising:

  • means for sensing an image sample from each of a plurality of portions of said image at each of a plurality of optical distances from said means for focusing, said means for sensing including means for scanning said image in a first direction, and a plurality of sensor means extending generally transverse to said first direction for sensing a line of image samples of said image at said plurality of optical distances;

    means for determining the relative focus of the image samples derived from a portion of said image at each of said plurality of optical distances; and

    means, responsive to said means for determining, for choosing, for each of said plurality of portions of said image, the image sample having a desired focus.

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