Encoder and apparatus using encoder

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9470557
APP PUB NO 20150076332A1
SERIAL NO

14484467

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Abstract

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The encoder includes a scale provided with first and second periodic patterns, a sensor movable relatively with respect to the scale and including a detection element array to detect the first and second periodic patterns, a periodic signal producer to produce, by using output from the detection element array, a first periodic signal changing corresponding to a first period of the first periodic pattern and a second periodic signal changing corresponding to a second period of the second periodic pattern, and a correction signal producer to produce, by using the second periodic signal, a correction signal for reducing in the first periodic signal a signal component changing corresponding to the second period. A position calculator produces, by using the first periodic signal and the correction signal, information indicating position.

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Patent Owner(s)

  • CANON KABUSHIKI KAISHA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Nagura, Chihiro Yokohama, JP 41 221

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