| 摘要 |
In a multibeam scanner, the resolution switching circuit 91 of the control unit 9 transmits a control signal to the motor drive circuit 92 and controls the motor drive circuit 92 to rotate the drive motor 78 at a velocity corresponding to the resolution. The resolution switching circuit 91 transmits a resolution signal to the image generation circuit 93 and controls the image generated circuit 93 to generate output image data that conforms to the resolution. The LD1 control circuit 95 and the LD2 control circuit 96 are modulated by the modulation circuit 94 to oscillate the laser diodes LD1 and LD2 based on the output image data. When performing exposure at a low resolution, the rearmost scanning line SL2 in the previous group of lines and the forwardmost scanning line SL1 in the following group of scanning lines are exposed according to the same image signal, thereby preventing a loss of image quality by preventing open areas of the interval I2 between scanning lines from becoming noticeable.
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