VORRICHTUNG ZUR DISTANZMESSUNG ZWISCHEN EINER LEUCHTQUELLE UND EINER MESSFLAECHE.

摘要

The distance measuring device is used to measure the distance of an object from a measuring surface using a laser light source (3) and an optical imaging system for the light reflected by the object directing a light fleck onto an optical sensor. This employs a CCD semiconductor matrix coupled to an evaluation circuit detecting the relative position of the light fleck. The evaluation of the light fleck position is effected using all the pulse trains provided by each row of the CCD matrix using a given formula. Pref. the pulses provided by the sensor are converted into binary coded data via an A/D converter before entering in a stores for the pulse image with and without the laser light in synchronism with the switching of the laser source (3). The difference between the stored sets of data is then fed to the position evaluation processor (306).