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:
Mar. 28, 2017
Filed:
Nov. 25, 2015
Fanuc Corporation, Minamitsuru-gun, Yamanashi, JP;
Nobuyuki Ootake, Yamanashi, JP;
Fanuc Corporation, Yamanashi, JP;
Abstract
In a rotary encoder of the present invention, each track of a rotary disk has transmitting parts and non-transmitting parts alternately arranged in the circumferential direction. Each non-transmitting part has a plurality of projecting parts which are arranged side by side in the circumferential direction. Each projecting part has a pair of reflecting surfaces which retro reflect incident light toward a light emitting part. A plurality of tracks include a periodic track where transmitting parts and non-transmitting parts are arranged with a periodic pattern and non-periodic tracks where transmitting parts and non-transmitting parts are arranged in a non-periodic pattern. The periodic track and non-periodic track are respectively arranged at positions in the radial direction where further reflected light at the light emitting part after retro reflection at the reflecting surfaces of the non-periodic track will not enter the periodic track.