| 摘要 |
In a method of writing a line of image on a photoreceptor with a laser beam in a main scanning direction, and of shifting in a sub-scanning direction to a next main-scanning line to write a next line of image, the method includes a step of shaping the laser beam spot on the photoreceptor to be in a form of an oval, said oval having a major axis that is in a direction that is in parallel to a main scanning direction of the laser.
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