Photoelectric position measuring encoder having scale formed of

Details Photoelectric position measuring encoder having scale formed of Photoelectric position measuring encoder having scale formed of

1997-04-23

1999-01-05

Allen, Stephone B.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

25023114, 250237G, 341 13, H01J 314

Patent

active

058566686

ABSTRACT:
A photoelectric position measuring encoder including a scale formed of an electrically non-conductive material and having a graduation, a scanner for photoelectrically scanning the graduation and displaceable relative to the scale in a measuring direction for generating a position-dependent signal, a slide or roller element for supporting the scanner on a scale surface, and an electrically conductive element with which the scanner-supporting scale surface region forms an electrical contact and which is connected to a reference potential.

REFERENCES:
patent: 4786891 (1988-11-01), Ueda et al.
patent: 4906838 (1990-03-01), Sogabe et al.
patent: 5030825 (1991-07-01), Ikeuchi
patent: 5670781 (1997-09-01), Setbacken

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