Rotary encoder

Details Rotary encoder Rotary encoder

1986-09-03

1989-05-23

Tarcza, Thomas H.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250237G, G01D 0534

Patent

active

048333166

ABSTRACT:
A photoelectric rotary encoder comprises some optical sensor pairs of light emitting elements and light receiving elements, a rotary disc formed with a plurality of slits at a first pitch, and a fixed plate provided with some slits at a second pitch. The first pitch is greater than the second pitch. Preferably, the difference between the first pitch and the second pitch is smaller than a half of the first pitch.

REFERENCES:
patent: 4593269 (1986-06-01), Nakamura et al.
patent: 4654523 (1987-03-01), Tanaka et al.
patent: 4654525 (1987-03-01), Ebina et al.
patent: 4658132 (1987-04-01), Nishiura et al.
patent: 4658133 (1987-04-01), Nishiura

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