| 摘要 |
An optical encoder includes a light source (10), a scale (20) disposed so as to face the light source, a light receiving element (31) configured to receive luminous flux from the light source through the scale, and a signal processing circuit (39) configured to process an output signal of the light receiving element. A light emitting window (11) of the light source is constituted of a collection of a plurality of point light sources and has a shape which meets a predetermined expression. |
