Patent ID: 8537340
Filing Date: 2013-09-17
Classification: G01B,G01S

Abstract:
1. An optical distance-measurement device, comprising: a light source; and an interferometer unit having a measurement retroreflector, a stationary reference retroreflector, a beam-splitter element, a beam-recombiner unit, and a detection unit; wherein a beam of rays emitted by the light source is swivelable about a center of the reference retroreflector; wherein the beam-splitter element is adapted to split the beam of rays arriving from the light source into at least one measurement beam of rays and a reference beam of rays; wherein the at least one measurement beam of rays propagates in a direction of the measurement retroreflector and the reference beam of rays propagates collinearly with respect to the at least one measurement beam of rays in a direction of the reference retroreflector; wherein the measurement retroreflector is adapted to reflect back the measurement beam of rays and the reference reflector is adapted to reflect back the reference beam of rays in a direction of the beam-recombiner unit, the at least one measurement beam of rays, prior to and after reflection at the measurement retroreflector, traveling symmetrically relative to the reference retroreflector; wherein the beam-recombiner unit is adapted to bring the at least one measurement beam of rays and the reference beam of rays to interference; and wherein the detection unit is adapted to ascertain distance-dependent interference signals.