公开(公告)号：US20230358574A1

公开(公告)日：2023-11-09

申请号：US18044215

申请日：2021-10-04

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： SHUICHI NAGAI ,  MASARU SHIRAISHI ,  JUNYA ASO ,  TOSHIHIRO KOGA ,  TAKUMA KATAYAMA

IPC: G01D5/347

CPC classification number: G01D5/3473

Abstract: Provided is an encoder capable of achieving high position resolution without being finely divided, and capable of detecting a rotation angle or the like with high sensitivity. The encoder includes: rotary plate (2) having a plurality of reflection structures (10) repeatedly formed and code (20) including light reflector (21); irradiator (4) that irradiates the plurality of reflection structures (10) with light; and light receiver (5) that receives light reflected by the plurality of reflection structures (10). Each of the plurality of reflection structures (10) has a surface in a convex shape, and each of the plurality of reflection structures (10) has a width that is an integral multiple of a width of light reflector (21).