METHOD AND DEVICE FOR OPTICAL SCANNING TYPE IMAGE RECORDING

摘要

PURPOSE:To obtain a picture image which is uniform and has a high grade, by controlling the intensity of a scanning beam according to the surface potential of a photoreceptor. CONSTITUTION:A function generator 39 emits the signal of a prescribed level changing according to the lapse time from a timing detector 32 with the timing detected with said detector as a reference, that is, the signal corresponding to the potential in the part to be scanned of a photoreceptor SP just prior to the exposure thereof. Either of said signal or the signal obtained by amplifying the output of a potential detecting means 10 with an amplifier 40 is selected with a switch 31 and is inputted to a modulation driving circuit 38. A modulator 2 which modulates the laser light outputted from a laser generator 1 is controlled by the output of the circuit 38, and scanning is accomplished with a scanning optical system 6. The picture image which is uniform and has a high grade is thus obtained.