Two-dimensional image readout device

The present disclosure is directed to a two-dimensional image readout device. The device includes a sensor device consisted of an insulating substrate, a plurality of parallel Y electrodes of conductor, a plurality of X electrodes disposed in a direction normal to the Y electrodes with a spacing therebetween and a photoconductive layer interposed in the spacing between the Y and X electrodes, at least one of the Y and X electrodes being made of transparent material. There are further provided an optical system for leading to a surface of the sensor device an image to be read out, a control circuit for scanning the photoconductive layer in association with guide operation for leading the image to the surface of the sensor device via the optical system while the electrodes are switched.