Method and apparatus for recording optical information by using a photoelectric transducer

In a system having a first electrode, a second electrode, a photosensitive member located between the first and second electrodes, a recording member located between the first and second electrodes, and an optical shutter, a method comprising the steps of:

• applying a predetermined voltage between the first and second electrodes during a predetermined period;
• applying light to the photosensitive member, the light having information to be recorded;
• recording the light information on the recording member;
• setting an exposure amount of the light with respect to the photosensitive member by setting a time during which the optical shutter remains open;
• during a period different from the predetermined period of application of the predetermined voltage, setting a drive voltage between the first and second electrodes in a condition where the recording member remains unchanged;
• and
• enabling an open period of the optical shutter and a period of the application of the drive voltage between the first and second electrodes to be different from each other in at least one of time length and time position.

An apparatus comprising:

• an optical shutter for setting an exposure light amount;
• a photosensitive member exposed to an optical image of an object when the optical shutter is open;
• a recording member recording information corresponding to the optical image when the optical shutter is open;
• first and second electrodes for applying an electric field to the photosensitive member and the recording member when a potential is applied between the first and second electrodes;
• means for applying a voltage between the first and second electrodes;
• and
• means for changing the voltage applied between the first and second electrodes
• wherein an open period of the optical shutter and a period of the application of the drive voltage between the first and second electrodes are different from each other in at least one of time length and time position.