Circuit provided with an exposure measuring part for sensor-controlled telemetry

Claim 1

A circuit having an exposure measuring portion and designed for sensor-controlled range measurement, comprising: two linear image sensors having sensor elements integrated on a doped semiconductor member; means for projecting line segments corresponding to two images separately obtained from an object onto the corresponding image sensors; and evaluator means connected to each of the sensor elements for switching between two different switching states depending upon whether a reference charge in the sensor elements is exceeded so as to digitalize sensor signals; an evaluating circuit means for evaluating the digitalized sensor signals in dependence upon varying relative position shifts with respect to a maximum correlation; device means connected to the evaluating circuit means for indicating a range of said object; an exposure measuring circuit having means for determining integration time of the sensor elements including a strip-shaped comparing sensor element co-integrated on the semiconductor member and longitudinally extending and positioned for exposure to an optically generated charge quantity which corresponds to a plurality of sensor elements in at least one of the image sensors; said comparison sensor element being designed as a strip-shaped photodiode arranged next to the sensor element row in at least one of the image sensors; and above a zone of the semiconductor member between the sensor element row and the comparison sensor element, a gate separated by a thin insulating layer from the semiconductor member is provided, said gate being subject to a constant voltage.