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:
Jul. 14, 2015
Filed:
Jul. 26, 2013
Kabushiki Kaisha Yaskawa Denki, Kitakyushu-shi, JP;
Yasushi Yoshida, Kitakyushu, JP;
Shirou Yoshidomi, Kitakyushu, JP;
Yasuhiro Matsutani, Kitakyushu, JP;
Jiro Muraoka, Kitakyushu, JP;
KABUSHIKI KAISHA YASKAWA DENKI, Kitakyushu-Shi, JP;
Abstract
This disclosure discloses an encoder. The encoder includes a slit array and an optical module. The optical module includes a point light source and a light receiving array comprising a plurality of light receiving elements arranged side by side along the measurement axis and arranged around the point light source in a plane parallel to the slit array, the light receiving elements being respectively receiving light irradiated from the point light source and reflected from the reflection slit. The light receiving array includes a first light receiving array and a second light receiving array. The point light source, the first light receiving array and the second light receiving array are arranged in the manner that a shortest distance between the point light source and the first light receiving array is smaller than a shortest distance between the point light source and the second light receiving array.