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Method and apparatus for raster scanning of images

  • US 5,959,286 A
  • Filed: 07/10/1997
  • Issued: 09/28/1999
  • Est. Priority Date: 05/18/1994
  • Status: Expired due to Term
First Claim
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1. An optical scanner for scanning an object having areas of different light reflectivity, the scanner comprising:

  • an optical source constructed and positioned to produce an outgoing light beam that moves in a path along a two-dimensional raster scan pattern over the object, wherein the raster scan pattern includes a scanning direction and a direction generally orthogonal to the scanning direction;

    an optical detector constructed and positioned to receive light reflected from the object and to produce a signal representative of reflectivity differences of the object along the path of the light beam; and

    at least one beam position sensor in the path of the outgoing light beam, the sensor being constructed and positioned to provide an output indicative of the location of the beam along the generally orthogonal direction of the raster scan pattern.

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