Method and device to determine a relative reference position for an angle measurement of an object
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United States of America Patent
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-
Sep 11, 1990
Grant Date -
N/A
app pub date -
Jan 5, 1989
filing date -
Jan 5, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and device to determine the relative reference position for an angle measurement of an object within an angle scale covering the round angle of the entire rotation of the object and divided into several angle areas of equal size on an exposed target area on or attached to the object of which an illuminated orbit is scanned. A significant deviation of the beam characteristics at least one point on the orbit forms a reference signal, which is coupled to the angle value of an angle scale to determine the reference angle position on the object.
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