| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical encoder with high utilization efficiency of light allowable mounting accuracy of an element and capable of obtaining stable output at high S/N ratio.SOLUTION: The optical encoder includes: a scale 5 with a signal pattern 6 formed linearly or circularly in which a reflective index periodically changes; a light emitting unit 1 that emits a beam of light toward the scale 5; a detection section 3 that detects one-dimensional distribution of the light reflected by the scale 5; and a diffraction grating 7 disposed between the light emitting unit 1 and the scale 5 for correcting the one-dimensional distribution of the light detected by the detection section 3. |
