Optical encoder with variable fiber/phase angle adjustment

Details Optical encoder with variable fiber/phase angle adjustment Optical encoder with variable fiber/phase angle adjustment

1987-04-30

1988-03-22

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250237G, G01D 534

Patent

active

047330716

ABSTRACT:
An optical encoder comprises a sensor head provided with a light emission portion and first and second light reception portions sandwiching the light emission portion therebetween, and a code member on which a plurality of reflective portions are formed at a predetermined pitch, the sensor head being arranged such that the first light reception portion, the light emission portion, and the second light reception portion successively face the code member with respect to the direction of movement of the reflective portions of the code member, and such that an azimuth angle of the light emission and light reception portions with respect to the direction of movement of the reflection portions of the code member can be changed, whereby two output having a predetermined phase difference can be obtained by suitably setting the azimuth angle of the light emission and light reception portions.

REFERENCES:
patent: 3344700 (1967-10-01), Brake
patent: 3902063 (1975-08-01), Oelsch et al.
patent: 4096383 (1978-06-01), Mancini et al.
patent: 4097150 (1978-06-01), Wu
patent: 4139889 (1979-02-01), Ingels

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