The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 07, 2017
Filed:
Nov. 04, 2014
Kabushiki Kaisha Yaskawa Denki, Kitakyushu-shi, JP;
Yasushi Yoshida, Kitakyushu, JP;
Yasuhiro Matsutani, Kitakyushu, JP;
Shiro Yoshidomi, Kitakyushu, JP;
Hiroshi Takada, Kitakyushu, JP;
Yuji Arinaga, Kitakyushu, JP;
Ikuma Murokita, Kitakyushu, JP;
Masanobu Harada, Kitakyushu, JP;
Hiroki Kondo, Kitakyushu, JP;
KABUSHIKI KAISHA YASKAWA DENKI, Kitakyushu-Shi, JP;
Abstract
An encoder includes a plurality of slit tracks, a point light source, a first light-receiving array, a second light-receiving array, and a third light-receiving array. The plurality of slit tracks respectively comprises a plurality of reflection slits arranged along a measurement direction. The point light source is configured to emit diffusion light to the plurality of slit tracks. The first light-receiving array is configured to receive light reflected by the slit track comprising an incremental pattern. The second light-receiving array is configured to receive light reflected by the slit track comprising an incremental pattern longer in pitch than other incremental patterns. The third light-receiving array is configured to receive light reflected by the slit track comprising an absolute pattern.