| 摘要 |
There is provided a method for controlling a line head including a focusing optical system, first light emitters, light from which being focused by the focusing optical system, second light emitters disposed next to the first light emitters in a first direction, light from the second light emitters being focused by the focusing optical system, and third light emitters disposed next to the second light emitters in the first direction, light from the third light emitters being focused by the focusing optical system. The method includes turning on the first light emitters at time t0, turning on the second light emitters after a period t1 has passed since the time t0, and turning on the third light emitters after a period t2 has passed since the time t0. The periods t1 and t2 are controlled under the following condition: t2<>nxt1 (n is an integer two or greater).
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