Incremental optical encoder with a tuned vernier

Details Incremental optical encoder with a tuned vernier Incremental optical encoder with a tuned vernier

1986-04-03

1987-08-11

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

340347P, 250237G, G01D 534

Patent

active

046863621

ABSTRACT:
The encoder comprises a rotor formed from a disc and a window-containing ring surrounding the disc periphery and able to undergo adjustment movements with respect to the disc. The encoder also comprises reading units formed from a light emitting diode, a window-containing screen and a phototransistor. The screens of these units can also undergo adjustment movements in order to obtain suitable phase differences between the signals emitted by the phototransistors.

REFERENCES:
patent: 3725902 (1973-04-01), Finnegan
patent: 4268747 (1981-05-01), Becchi et al.
patent: 4512184 (1985-04-01), Ernst et al.
patent: 4628200 (1986-12-01), Tinios

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