Optical encoder

摘要

An linear encoder (1) includes: a scale; a light-emitting element that emits light onto the scale; a detecting head (2) that has a light-receiving element (22) that receives the light emitted by the light-emitting element (21) to be reflected or transmitted by the scale; and a connector (4) connected to the detecting head (2) via a cable (3). The connector (4) comprises a display (5) that displays a status of the light received by the light-receiving element (22) and a connector controller (6) that controls the display (5). The connector controller (6) includes a display controller (62) that controls the display (5) in accordance with the intensity of the light received by the light-receiving element (22).