Patent ID: 6965437

Claim:
A scanning unit for an optical position measuring device for scanning a periodic strip pattern in a detector plane, comprising: a detector arrangement comprising a first detector array with a first set of n number of radiation-sensitive detector elements, which are arranged in succession next to each other in a first direction on a common support substrate with a common first period, a second detector array arranged adjacent to said first detector array in a second direction perpendicular with respect to said first direction in a detection plane, wherein said second detector array comprises second set of n number of radiation-sensitive detector elements arranged in succession next to each other in said first direction with a common second period P DET , and have a geometrically defined offset (Δx 1i ) in said first direction with respect to said first set of several radiation-sensitive detector elements so that n phase-shifted signals are generated by said first set and said second set of n number of radiation-sensitive detector elements, wherein said n phase-shifted signals have different phases with respect to each other, wherein n=2, 3, 4, . . . .