| 摘要 |
A magnetic incremental encoder includes a plurality of detection devices which are provided on an outer periphery of a rotational member at a predetermined phase difference, wherein each of the detection devices outputs signals which vary periodically in accordance with the rotational angle of the rotational member upon rotation thereof; wherein the plurality of detection devices are provided in sets of two detection devices on the outer periphery of the rotational member, wherein a phase difference between one of the sets of two detection devices and an adjacent another of the sets of two detection devices is determined according to the following formula:wherein P designates an arbitrary integer; and j designates one of the number of k orders, wherein k designates the number of orders of harmonic distortions to be corrected. The number of the plurality of detection devices is equal to 2k.
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