Optical bar code reader
Laser beam label reader head
Device for scanning an object with a light beam
Bar code scanner using non-coherent light source
Optical fault seeking apparatus
Method and apparatus for reading a bar code Patent #: 4488678
ApplicationNo. 06/488885 filed on 04/26/1983
US Classes:235/462.22, Extended reader working range (e.g., multiple focal planes)235/462.39, Polygon359/217, With facets parallel to rotation axis359/219Having five or fewer facets
ExaminersPrimary: Trafton, David L.
Attorney, Agent or Firm
International ClassG06K 7/10 (20060101)
AbstractA system for optically scanning objects, particularly bar codes over a large depth of field, uses a incandescent light source to illuminate the bar code and scans the field using a rotating polygon having mirrors with different curvature on different facets thereof which provides scanning in different focal planes in the field while temporally multiplexing these planes. The optical, electronic and mechanical components are modularly packaged on a printed circuit board adapted to be contained in a housing which may be held near and pointed at the code when it is desired to read the code.