| 摘要 |
PROBLEM TO BE SOLVED: To provide a color laser printer capable of making alignment of position with respect to a polygon mirror simplified, and attaining the miniaturization and reliability improvement. SOLUTION: This printer is, respectively provided with the one laser unit 1 equipped with a laser diode(LD) capable of successively projecting in order by data for one color on a respective surface of the polygon mirror whose respective mirror surface is inclined for four kind of angle so that the angle of the respective mirror becomes the same by every four surface by making the surfaces of the mirror to the multiple of four. Then, these image laser beams of four colors projected from the LD, is respectively projected on the surface inclined by the specified degrees of the respective polygon mirror surface and deflected, and thereafter scanned on respective photoreceptor drum 11Y, 11M, 11C and 11BK after the respective light path is changed by the first turning back mirrors 5Y, 5M, 5C and 5BK, the second turning back mirrors 6Y, 6M, 6C and 6BK, and the third turning back mirrors 7Y, 7M, 7C and 7BK. |
