Method for controlling signal integration time of a signal integration type image sensing device

摘要

Disclosed is a method for controlling a signal integration time of signal integration type image sensing device having a plurality of signal integration type radiation-sensitive elements. An integrated value of the signal from at least one of the radiation-sensitive elements is monitored without contact. When the integrated value of the signal from this element reaches a predetermined value after initiation of the signal integration, a control signal is generated to start readout of the signals from all the elements up to this point.