| 摘要 |
An optical encoder, comprising a plurality of light receiving elements 1-12, receiving light that has passed through or been reflected by a scale having a lattice of pitch P, and outputting four-phase signals that have been respectively offset in phase by an integer number of times 90° (1/4P). 12 light receiving elements being are in the lateral direction (scale longitudinal direction) with gaps between them of P/60 or 2P/60, four arbitrary light receiving elements arranged next to each other in a row all output signals of different phases, and light receiving elements respectively outputting signals of same phase have three lateral widths of 70P/60, 13P/60 or 20P/60. |
| 主权项 |
1. An optical encoder, comprising:
a plurality of light receiving elements configured to receive light that has passed through or been reflected by a scale having a lattice of pitch P, and further configured to output four-phase signals that have been respectively offset in phase by an integer multiple of 1/4P, wherein 1/4P is equal to 90°, and wherein the plurality of light receiving elements all have a same vertical width, the plurality of light receiving elements comprise 12·N (N is a natural number) light receiving elements arranged in a lateral direction and spaced apart by P/60 or 2P/60, wherein N is a natural number, the plurality of light receiving elements comprise four light receiving elements arranged next to each other in a row, each of which outputs a signal of a different phase, and the plurality of light receiving elements comprise light receiving elements outputting a same phase signal and defining lateral widths of 7P/60, 13P/60 or 20P/60. |
