| 摘要 |
An optical scanning device of the present invention includes a plurality of light source units each including two semiconductor lasers and two coupling lenses respectively associated with the lasers. A single rotatable deflector is implemented as two polygonal mirrors coaxially stacked on each other and different in angular phase from each other. The deflector deflects laser beams issuing from the light source units for thereby scanning a plurality of photoconductive drums via conventional optical devices. A synchronization sensor is shared by the laser beams, but can easily output synchronizing signals clearly separate from each other. <IMAGE> |
