Patent ID: 6206287
Filing Date: 2001-03-27
Classification: G06K

Abstract:
A bar code reader for reading an optical bar code image having parallel rows of clock and data elements extending longitudinally along the length of a filmstrip, the row of clock elements having at least one longitudinally extending edge transition, the reader comprising:a film path;an illuminant source;a linear, pixel-by-pixel light sensor array for detecting illuminant from said source passing through said filmstrip in a region encompassing said bar code image;a scanning aperture defining a window of exposure of said illuminant source through said bar code onto said light sensor array;a light sensor array for detecting illuminant from said source passing through said film in a region encompassing said bar code image; anda data processing controller responsive to output information from the light sensor array from within said bar code exposure window for laterally locating said longitudinal edge transition of an element in the row of clock elements and for determining binary values of the clock and data elements from the sensor array output information at predetermined spaced locations relative to the located edge transition of the element in the row of clock elements.