PHASE NOISE COMPENSATION FOR AN INTERFEROMETER MEASURING ABSOLUTE DISTANCE

摘要

The invention relates to a method for interferometric absolute distance measuring by a frequency modulation electromagnetic radiation on at least one measurable target and for subsequently receiving a retransmitted radiation with a heterodyne mixture, wherein the radiation is guided in a parallel direction via a reference interferometric length. In such a way, a first digitised interferogram of the radiation retransmitted by the target and a second digitised interferogram of the radiation guided on the reference length are obtainable at a reception. According to phase progression data of the second interferogram, a virtual interferogram or a phase progression thereof is synthesised and the distance determination is carried out by comparing the progression face data of the first interferogram with the progression face data of the virtual interferogram.