Automatic stripe width reader

Details Automatic stripe width reader Automatic stripe width reader

H - Electricity

01

J

316/3, 33/63

H01J 9/42 (2006.01)

Patent

CA 1147383

RCA 73,558 Abstract Apparatus is provided for determining the widths and spacings of substantially parallel opaque stripes on a substrate, wherein the stripes are separated by openings. The apparatus comprises a light source for illuminating the substrate and photodetecting means positioned to receive light from the illuminated substrate. Means are included for scanning the photodetecting means transverse to the stripes and for sweeping the photodetecting means in a direction substantially parallel to the stripes. The apparatus further includes means for converting the output of the photodetecting means into a quantized signal, means for dividing the quantized signal into separate signals representing stripe widths and opening widths between stripes, and means for converting the stripe width and opening width signals into a signal representing center-to- center spacing between openings.

342372

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