Patent ID: 9410797
Filing Date: 2016-08-09
CPC Classification: G01B,G01D

Claim Text:
1. An optical position-measuring device for detecting a position of two objects movable relative to one another, comprising: a measuring standard connected to one of the two objects; a scanning system adapted to scan the measuring standard, the scanning system being connected to the other one of the two objects, the scanning system adapted to permit simultaneous determination of position along a first lateral shift direction of the objects, along a second lateral shift direction of the objects that is perpendicular to the first lateral shift direction, and along a vertical shift direction of the objects, the scanning system adapted to form first and second scanning beam paths to generate a group of phase-shifted signals at an output end from interfering partial beams of rays, the scanning system adapted to form a third scanning beam path to determine position along the second lateral shift direction; a light source adapted to supply a beam to the scanning system via a first light guide and coupling-in optics that are common to all three scanning beam paths; and coupling-out optics that are common to all three scanning beam paths and that are adapted to couple the interfering partial beams of rays produced in the three scanning beam paths into a second light guide to supply the interfering partial beams of rays to a detector system; wherein the measuring standard includes a cross grating.