Optical shaft angle encoder
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United States of America Patent
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-
Nov 22, 1983
Grant Date -
N/A
app pub date -
Jun 10, 1981
filing date -
Jun 10, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An optical shaft angle encoder which provides sensor output voltages having waveform characteristics modified for use with 'multiplication type' tachometer converter circuits to provide improved servo control system performance by reducing step changes in the tachometer output voltage due to phase error and reducing tachometer output voltage ripple. The geometry of the encoder mask combination provides a non-sinusoidal sensor output voltage comprised of linear and parabolic segments having a trapezoidal derivative.
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