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:
Nov. 11, 2025
Filed:
Feb. 02, 2024
Magnescale Co., Ltd., Kanagawa, JP;
Akihiko Sato, Kanagawa, JP;
Magnescale Co., Ltd., Kanagawa, JP;
Abstract
A rotary encoderincludes a rotary scalehaving a cylindrical surfaceas a detected surface and having a relative angle trackformed circumferentially on the cylindrical surface, a sensor headarranged with an interval from the cylindrical surfaceand detecting the relative angle trackand outputting a detection signal, and a first angle calculatorcalculating a rotation angle of the rotary scalebased on the detection signal from the sensor head. The rotary encoderincludes an angle error storagestoring an angle error corresponding to the size of the interval at each rotation angle calculated based on the detection signal from the sensor head, and an angle compensatorcompensating the rotation angle calculated by the first angle calculatorbased on the angle error at each rotation angle stored in the angle error storage