Patent ID: 8686717

Claim:
A position sensor arrangement, comprising: a first pair of sensing elements that sense the two-dimensional position of a movable device relative to a first sensing grid, one of the first pair of sensing elements is arranged to provide one of the two dimensions and the other of the first pair of sensing elements is arranged to provide the other of the two dimensions; and a second pair of sensing elements that sense the two-dimensional position of the movable device relative to a second sensing grid, one of the second pair of sensing elements is arranged to provide one of the two dimensions and the other of the second pair of sensing elements is arranged to provide the other of the two dimensions, wherein the first and second pairs of sensing elements are mounted according to an angular offset with respect to one another so that the first and second pairs of sensing elements do not share the same axes and so that the position sensor arrangement can determine the two-dimensional position of the movable device.