Patent ID: 8432535
Filing Date: 2013-04-30
Classification: G01C,G01S

Abstract:
1. An optoelectronic range finder, comprising: an emitter having a first end for emitting a measuring beam to an object to be measured and a second end; a receiver for receiving the measuring beam as reflected or dispersed back from the object to be measured and for converting the received measuring beam into a low frequency measurement signal; a signal processing device for filtering the measurement signal and a reference signal; and a control and analysis device for analyzing information associated with the measurement signal and the reference signal so as to determine the distance from the object; wherein a reference beam is emitted from the second end of the emitter and is received by the receiver and converted to form the reference signal, wherein the reference signal is received through a known inner reference optical path, wherein the measuring beam and the reference signal are modulated by a high frequency modulated signal, and wherein the measurement beam and the reference signal are converted to the low frequency measurement signal and a low frequency reference signal by mixing with a high frequency signal.