| 摘要 |
<p>Optical encoders supply binary logic signals representing the relative position increments of two elements of the encoder, the two elements being mobile relative to one another. The first element bears at least one mark and the second element bears a pair of detection cells for detecting the mark. The dimensions of the mark are defined so that said mark can be detected either by neither of the two cells, or by a single cell or by both cells. The invention is well suited to angular encoders, and makes it possible to widen the manufacturing tolerances of the marks on the first element and on the relative position of the two cells.</p> |
