Code wheel for a reflective type optical rotary encoder

Details Code wheel for a reflective type optical rotary encoder Code wheel for a reflective type optical rotary encoder

1988-06-29

1989-02-21

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

G01D 534

Patent

active

048067512

ABSTRACT:
A code wheel for use with a reflective type optical rotary encoder which can be produced easily and optically read efficiently. The code wheel includes a non-reflective plate, and a reflective plate having a suitable number of notches formed along a periphery thereof and mounted in an overlapping relationship on the non-reflective plate whereby a reflective portion of the code wheel is formed by a face of the reflective plate between each two adjacent notches while a non-reflective portion is formed by a face of the non-reflective plate exposed through the corresponding notch of the reflective plate.

REFERENCES:
patent: 4400443 (1983-08-01), Green
patent: 4644156 (1987-02-01), Takahashi et al.

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