The invention relates to a method and apparatus for measuring the velocity of a moving object. Measuring beams composed of sequences of optical pulses are directed towards the object which is to be measured and follow such object. Based upon transit time measurements of reflected pulses there are formed...http://www.google.de/patents/US4527894?utm_source=gb-gplus-sharePatent US4527894 - Method and apparatus for measuring the velocity of moved objects or the like
