| 摘要 |
PURPOSE:To correct the sensitivity characteristic deviation of a photosensitive body and to obtain a recording image of high quality reduced at its fogging or density difference by controlling the exposing time of each part on the photosensitive body in response to the distribution of the sensitivity characteristic deviation. CONSTITUTION:An output from a sensitivity characteristic distribution input device 1 for the photosensitive body 10 is stored in a RAM2 and the stored contents are added to an image signal generated from a signal generator 3 in synchronism with the scanning position of the photosensitive body 10. The added data are converted by a D/A converter 5 and the analog signal is compared with a waveform value outputted from a waveform generator WG6 by a comparator 7. The WG6 generates a prescribed synchronized triangular wave signal with a prescribed period in synchronism with an image clock phi. As the result of comparison, the exposing time of each picture element is shorter than the whole lighting time on the front side of the bus direction of the photosensitive body 10 with high sensitivity and that is equal to the whole lighting time on the depth side with low sensitivity. A laser driver 8 is driven by a laser lighting signal corrected by said procedure and a semiconductor laser is flickered.
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