| 摘要 |
An optical scanning device has an incident optical system in which optical path lengths from laser diodes to a polygon mirror become longer in the order of the optical path length of the laser beam associated with black, that of the laser beam associated with cyan, that of the laser beam associated with magenta and that of the laser beam associated with yellow. The optical scanning device has an outgoing optical system in which optical path lengths from the polygon mirror to mirrors at which laser beam eclipse occurs become shorter in the order of the optical path length of the laser beam associated with black, that of the laser beam associated with cyan, that of the laser beam associated with magenta and that of the laser beam associated with yellow.
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