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Photoelectric encoder | Fotoelektrischer Kodierer | Codeur photoélectrique

Patentnummer:EP1821075B1
IPC Hauptklasse:G01D0005245
Anmelder:Mitutoyo Corporation (0)
20-1, Sakado 1-chome, ; Takatsu-ku, ; Kawasaki, Kanagawa 213-0012, JP
Erfinder:Kawada, Hiroaki (0)
Mitutoyo Corp.; 20-1 Sakado 1-chome; Takatsu-ku, Kawasaki-shi; Kanagawa 213-0012, JP
Yaku, Toru (0)
Kanagawa, Kawasaki, JP
Anmeldung:12.02.07
Offenlegung:15.02.06
Patenterteilung:29.11.17

Abstract / Hauptanspruch
In a photoelectric encoder (incremental encoder and absolute encoder) having a detector that is displaceable relative to a scale having a predetermined pattern (incremental pattern and pseudorandom pattern) formed thereon, the detection range, to be simultaneously detected, of the pattern is divided in at least the detectiondirection, and a plurality of light-receiving systems are provided to detect each of the respective detection areas, whereby measurement of a wide detection range is enabled by using a small-sized and simple optical system and light-receiving system.

EP1821075B1


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