Patent ID: 9400168
Filing Date: 2016-07-26
CPC Classification: G01B

Claim Text:
1. A device for interferential distance measurement, comprising: a measurement reflector comprising a single surface; a light source emitting a beam parallel to said surface; a splitter element comprising a splitter grating that is disposed perpendicular to said surface, wherein said splitter grating receives said beam and splits said beam into a measurement beam and a reference beam, wherein said measurement beam reflects acting at least twice upon said single surface of said measurement reflector along a path of said measurement beam; a combining element, at which said measurement beam and said reference beam enter into interferential superposition to form interfering measurement and reference beams; and a detector arrangement, by way of which a plurality of phase-shifted, periodic scanning signals pertaining to a distance between said measurement reflector and a component of said device in a measuring direction are generated from said interfering measurement and reference beams.