Single track encoder for providing absolute position information

Details Single track encoder for providing absolute position information Single track encoder for providing absolute position information

1998-03-23

2000-10-31

Le, Que T.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356375, G01D 534

Patent

active

061406368

ABSTRACT:
An optical encoder provides absolute position information by inducing a position error in its output signal. The position error can be induced in the signal by shifting a slot in an encoder wheel or encoder strip relative to other slots in the encoder wheel. The position error is detected to identify an absolute position of the encoder wheel or the encoder strip.

REFERENCES:
patent: 4945231 (1990-07-01), Ohya et al.
patent: 5068529 (1991-11-01), Ohno et al.

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