04074258 is referenced by 27 patents and cites 3 patents.

A device for reading out the position of a movable member comprising a sc carried by that member and having equidistant coded references. Each reference is different from the others. A stationary optical system forms the image of a portion of the scale on a fixed detector. The detector comprises a linear matrix of photo detectors regularly distributed at predetermined intervals and associated with electronic means which identifies the coded reference whose image is formed on the matrix and reads out the serial number of the photo element on which the leading edge of the coded reference is formed.

Title
Device for reading displacements of a movable member
Application Number
5/682347
Publication Number
4074258
Application Date
May 3, 1976
Publication Date
February 14, 1978
Inventor
Jacques Rochereau
Montmagny
FR
Jean Picard
Versailles
FR
Alain Dore
Conflans Sainte-Honorine
FR
Agent
Larson Taylor and Hinds
Assignee
Societe d Applications Generales d Electricite et de Mecanique
FR
IPC
H03K 13/18
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