| 摘要 |
The displacement detecting apparatus acquires a quantity of a relative rotational displacement between a scale and a detecting head, based on a change of outputs of the light-receiving elements. The displacement detecting apparatus acquires the quantity of the relative rotational displacement between the scale and the detecting head, by combining a quantity of a rough relative rotational displacement between the scale and the detecting head, which has been acquired from an output of the total of light quantities that are output from each of the light-receiving elements in the detecting head, with a quantity of a fine relative rotational displacement between the scale and the detecting head, which has been acquired from an incremental displacement signal that is output from each of the light-receiving, elements in the detecting head. |
