| 摘要 |
A position measuring system including a scale and a scanning unit for scanning the scale and movable relative to the scale in a measuring direction, for generating position-dependent measuring signals, the scanning unit including a pattern with first and second sections. A reference track including a first field on one side of a reference position, and a second field which is different from the first field and located on the other side of the reference position, wherein when the first field of the reference track is scanned by the pattern of the scanning unit, a continuously strong scanning signal is generated and when the second field of the reference track is scanned by the pattern of the scanning unit a continuously weak scanning signal is generated. A module to which the scanning signal of the reference track is supplied and forms a characteristic signal.
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