Optics: measuring and testing – By configuration comparison – With photosensitive film or plate
Patent
1979-09-04
1985-02-12
Punter, William H.
Optics: measuring and testing
By configuration comparison
With photosensitive film or plate
G01B 1102
Patent
active
044987790
ABSTRACT:
A system is provided for determining the widths and spacings of substantially parallel opaque stripes on a substrate, wherein the stripes are separated by openings. The system 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 system 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.
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Williams, E. R., "Two Dimensional Image Sensor Using One-Dimensional Sensor Array", IBM Tech. Disc. Bull., 7-1978, pp. 436-437.
Beltz John P.
Davis Richard B.
Fairbanks David W.
Southgate Peter D.
Bruestle Glenn H.
Irlbeck Dennis H.
Punter William H.
RCA Corporation
Whitacre Eugene M.
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