Method of recording information with a picture storage tube and reading without erasing the information

摘要

A method of recording information with a picture storage tube having a memory signal plate of photo diodes, means for generating electron beam and means for deflecting the beam for scanning one side of a memory plate, the method including the steps of erasing the signal plate, writing or recording information on the plate by exposing the one side of the signal plate to radiation containing information to be recorded and reading the information from the plate characterized by changing the value of the potential applied to the signal plate for each of the steps of writing, reading and erasing with the value of the potential applied during the writing step being greater than the potential applied during the reading step and less than the potential applied during the erasing step so that the step of reading the photo diodes of the signal plate is accomplished without erasing the information contained thereon. Preferably, a voltage of +14 volts is applied during the reading step, a voltage of +20 volts is applied during the writing or recording step and erasing is accomplished by applying a voltage of approximately +50 volts.