Position detecting device and method
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United States of America Patent
Stats
-
Aug 18, 1987
Grant Date -
N/A
app pub date -
Apr 15, 1985
filing date -
Apr 20, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An improved method and device for detecting a position of a mark formed on an object, by providing plural peaks in an image density distribution, wherein the image of the object having the mark is picked up to provide an image signal which in turn is processed to provide an integrated image-density distribution of the image in a predetermined direction and wherein the position of the mark is detected on the basis of the plural peaks in the integrated image-density distribution.
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Cited Art Landscape
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