| 摘要 |
An optical encoder (10, 20, 30) includes a light-emitting element (LED), a scale grating (SCL) configured to transmit or reflect a divergent light from the light-emitting element to divide the divergent light into a plurality of lights, an optical mask grating (SLT) configured to modulate the plurality of lights with phases thereof different from each other in accordance with a relative movement between the light-emitting element and the scale grating, and a light-receiving element array (PDA) including a plurality of light-receiving elements configured to receive the modulated plurality of lights.
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