| 摘要 |
A multi-beam laser scanning unit includes a plurality of laser diodes to emit laser beams, and a rotary polygon mirror to deflect the laser beams emitted from the plurality of laser diodes in a scan direction of a photoconductive medium. The plurality of laser diodes are arranged in a line so that a connecting line of focal points formed by the laser beams forms a vertical line or substantially a vertical line on the photoconductive medium. The multi-beam laser scanning unit may further include a plurality of delay circuits connected to the laser diodes to delay a beam emission time of a first-emitted laser beam among the plurality of laser beams emitted from the laser diodes.
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