| 摘要 |
In an image-forming device includes an image-forming unit, a first conveying unit, a first changing unit, and a second changing unit. The image-forming unit includes a rotatable mirror, a light-emitting unit, a photosensitive drum, a developing unit, a transferring unit. An electrostatic latent image composed of a plurality of line electrostatic latent images extending in a main scanning direction over a first length is formed on the photosensitive drum. The first conveying unit conveys a recording medium to the transferring position in a sub-scanning direction orthogonal to the main scanning direction. The first changing unit changes a rotating speed of the rotatable mirror to change the first length. The second changing unit proportionally changes a conveying speed of the first conveying unit in accordance with the change of the rotating speed of the rotatable mirror.
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