Patent ID: 9664502
Date: 2017-05-30
CPC Classifications: G01B,G01D

Claim:
1. An interferential position-measuring device for determining a position of an object which is disposed to be movable along at least one measurement direction, the device comprising: a light source configured to emit a beam which is split into at least two sub-beams, at least one of the sub-beams impinging on one or more optical functional elements on the object, the sub-beams subsequently being superimposed and interfered at a superposition location and at least one resulting signal beam propagating toward an evaluation unit configured to generate at least one position-dependent measurement signal from the at least one resulting signal beam; and at least one switching element disposed in the signal path downstream of the superposition location and upstream of a signal-digitizing device, the at least one switching element being configured to define a specific point in time at which sampling occurs.