| 摘要 |
A color image forming apparatus has a color mode for color printing and a monochrome mode for printing at a higher speed than the printing speed of the color mode. The color image forming apparatus has mirrors 33, 35 and 37 that reflect the laser beams in order to guide the laser beams to optimum positions when the laser beams are guided from light sources (LD) to photoconductor drums 58 , and in an optical system for the monochrome mode, the mirrors whose number is smaller than that in the other optical systems are arranged.
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