In the control unit {HEAD ~ a phase measurement} is carried out and an evaluation device computes {TAIL ~ the distance information} from the phase difference 
In the control unit { HEAD ~ a phase measurement } is carried out and an evaluation device computes { TAIL ~ the distance information } from the phase difference
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH