Optical rotary encoder having superposed metal plate and shield

Details Optical rotary encoder having superposed metal plate and shield Optical rotary encoder having superposed metal plate and shield

1987-01-09

1988-10-25

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250237G, G01D 534, H01J 314

Patent

active

047806109

ABSTRACT:
A manually-operated optical rotary encoder is provided with light receiving and emitting elements, the optical encoder generating a plurality of pulse signals. The rotary encoder comprises a reflecting plate and a non-reflecting plate which are superposed. The rotary encoder comprises a first code plate and a second code plate, which are alternately and continuously formed with light reflecting portions and non-reflecting portions. The rotary encoder further comprises a roller engageable with concavo-convex portion provided in the outer peripheral edge of the first code plate, a shaft for the roller and a supporting member for rotatably supporting the roller so that the latter may come into contact with the concavo-convex portions. The roller, the shaft and the supporting member are formed of synthetic resin.

REFERENCES:
patent: 4616131 (1986-10-01), Burkhardt
patent: 4644156 (1987-02-01), Takahashi et al.
patent: 4673809 (1987-06-01), Geyer et al.

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