Patent ID: 11946782
Assignee: DR. JOHANNES HEIDENHAIN GMBH
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 1:
2. The optical position-measuring device as recited in claim 1, wherein in each areal measuring graduation region, the line grating has a line grating region which:
includes at least a first pair of straight grating lines which extend over an entire length of the respective areal measuring graduation region and are arranged parallel to a first one of the directions of extent at a first distance relative to each other, the line grating region along the first direction of extent having same periodicities as the respective areal measuring graduation region, and
in a case of a two-dimensional line grating, further includes a second pair of straight grating lines which extend over the entire length of the respective areal measuring graduation region and are arranged along a second one of the directions of extent, which is oriented perpendicular to the first direction of extent, at a second distance relative to each other, the line grating region along the second direction of extent also having same periodicities as the respective areal measuring graduation region.