Pattern detecting apparatus
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United States of America Patent
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Nov 19, 1996
Issued Date -
N/A
app pub date -
Jun 2, 1995
filing date -
Nov 13, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A pattern detecting apparatus having an irradiating means for emitting light and irradiating a surface of an object whose pattern is to be detected, and a light detecting means for detecting light reflected from the surface of or transmitted through the object, wherein a pattern on the surface of the object is detected based on information from the light detecting means is disclosed. The pattern detecting apparatus further comprises a light transmitting means for transmitting light advancing in a predetermined direction. The light transmitting means is positioned between the object and the light detecting means such that the predetermined direction coincides with the direction in which the reflected or transmitted light from the object advances.
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