Patent ID: 8294454

Claim:
Position measuring device with a solid measure and a scanning mechanism, whereby the solid measure and the scanning mechanism are displaceable relative to one another in a direction of measurement and have a distance in a direction that is not measured which is perpendicular to the direction of measurement, and whereby a quality of a scan signal generated by the scanning mechanism is dependent on the direction in the distance that is not measured, comprising: a first and second solid measure and a first and second scanning mechanism, wherein: the first and second solid measure and the first and second scanning mechanism are respectively designed identically but mirrored in a plane including the direction of measurement and perpendicular to the direction that is not measured, the first and second solid measure are mounted in a fixed opposite position in a direction that is not measured; the first and the second scanning mechanism are mounted in a fixed opposite position in the direction that is not measured; at least one of the first and second scanning mechanisms scans at least one of the first and second measures using a method selected from the group consisting of optically, capacitively, inductively and magnetically; the scanning signals generated by the first and second scanning mechanisms respectively are electronically combined into an output scanning signal; and amplitudes of at least two scanning signals are added.