| 摘要 |
An optical distance-measuring device includes a light source, and an interferometer unit having a measuring retroreflector, stationary reference retroreflector, beam-splitter element, beam-recombiner unit, and detection unit. The beam of rays emitted by the light source swivels about the center of the reference retroreflector. The beam of rays arriving from the light source splits via the beam-splitter element into a measuring beam and reference beam. The measuring beam propagates in the direction of the measuring retroreflector, and the reference beam propagates collinearly with the measuring beam in the direction of the reference retroreflector. The measuring beam is reflected back by the measuring retroreflector and the reference beam is reflected back by the reference retroreflector in the direction of the beam-recombiner unit, the measuring beam traveling symmetrically relative to the reference retroreflector prior to and after reflection at the measuring retroreflector. |
