ENCODER

专利名称：ENCODER

发明人：OKADA YASUYUKI,ABE YASUNORI申请号：EP12823816申请日：20120810公开号：EP2743648A4公开日：20150429

摘要：The present disclosure is to provide an encoder allowing enhancement in thedetection accuracy of the amount of movement with the intermediary of a gap from amagnetic medium. A magnetic medium is magnetized in the relative movement directionat a predefined pitch »m and a magnetic sensor includes plural magnetoresistiveelements whose electrical resistance value changes depending on a magnetic field at aplace where the magnetoresistive element is disposed. A position where the

magnetoresistive element is disposed is defined as a reference position and, in additionto the magnetoresistive element of this reference position, the magnetoresistive

elements as harmonic reducing patterns are disposed at the following positions, with P(n)defined as the n-th prime: a position offset by »m/(2·P(n)) from the reference positiontoward at least one side of the relative movement direction, wherein N ‰¥ n > 1 and N isa natural number satisfying N > 3, and a position further offset by »m/(2·P(L + 1)) from aposition offset by »m/(2·P(L)), wherein 1 < L < N.

申请人：HITACHI METALS, LTD.

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