| 摘要 |
In an apparatus for adjusting the intensity of a light beam, the light beam from a semiconductor laser is deflected to scan a photosensitive drum and is detected to generate a positional signal by a photodetector outside of the drum. The intensity of the light beam is also detected by a monitor detector and compared with a predetermined value. The comparison result is latched in a latch circuit in accordance with the positional signal and the semiconductor laser is controlled depending on the latched comparison result.
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