Method and apparatus for detection of position with correction o

Details Method and apparatus for detection of position with correction o Method and apparatus for detection of position with correction o

1986-03-31

1988-06-14

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250231SE, H01J 314

Patent

active

047513837

ABSTRACT:
A method for detecting a position wherein a signal outputted from a position detecting scale is detected by at least two detectors, an output value of a preceding detector of these two detectors is stored anew at the time when an output value of a following detector of the two detectors comes near a scale position on which the output value of the preceding detector is once stored and becomes equal to the output value of the preceding detector, and a position detecting signal is outputted, these steps being repeated to detect the position.

REFERENCES:
patent: 4488237 (1984-12-01), Aronson et al.
patent: 4636079 (1987-01-01), Rieder et al.

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