Picture information memory device and picture information reproducing device using Pockels readout optical modulator element

摘要

Disclosed is a picture information memory device, including a picture information memory means (16) for generating electric charges corresponding to the intensity of write-in light incident thereon, and for holding the generated electric charges as polarized charges, an exposing means (17,18,19) for exposing the picture information memory means to light from an object, and an alternating-current bias voltage applying means (13,14,15) for applying an alternating-current bias voltage having a desired frequency to the picture information memory means, whereby electric charges generated by the portion of the object light the intensity of which varies at the same frequency as that of the alternating-current bias voltage, are selectively accumulated from the entirety of electric charges generated by the object light incident on the picture information memory means, and held as the polarized charges in the picture information memory means.