公开(公告)号：US12203786B2

公开(公告)日：2025-01-21

申请号：US18554950

申请日：2022-04-12

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Masaru Shiraishi ,  Shuichi Nagai ,  Junya Aso

IPC: G01D5/34 ,  G01D5/347

Abstract: An encoder includes: a rotating plate; an irradiator that irradiates the rotating plate with light; and a light receiver that receives the light which has been emitted from the irradiator and traveled via the rotating plate. The rotating plate includes at least one curved surface, and the irradiator simultaneously irradiates each of a plurality of surfaces including the curved surface with light.

公开(公告)号：US11982550B2

公开(公告)日：2024-05-14

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 having a plurality of reflection structures repeatedly formed and code including light reflector; irradiator that irradiates the plurality of reflection structures with light; and light receiver that receives light reflected by the plurality of reflection structures. Each of the plurality of reflection structures has a surface in a convex shape, and each of the plurality of reflection structures has a width that is an integral multiple of a width of light reflector.