Encoder
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United States of America Patent
Stats
-
Mar 26, 1985
Grant Date -
N/A
app pub date -
Apr 23, 1981
filing date -
Apr 30, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An encoder having an optical measuring part establishing a vernier relationship between a code plate and a line sensor, and counters for obtaining a course reading from time serial output signals of the line sensor and a fine reading from the vernier relationship. Correction data including a change component in a magnification of a lens system are obtained from a counter. The correction data and the fine reading are supplied to a converting circuit to provide a corrected fine reading.
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