| 摘要 |
<p>A multi-beam light scanning optical system includes n (n ‰¥ 2) light source means having m (m ‰¥ 2) light emitting points; beam synthesizing means for synthesizing n x m light beams emitted by the light source means; deflecting means for deflecting n x m light beams from the beam synthesizing means; an imaging optical system for imaging the n x m light beams from the deflecting means on a surface to be scanned, wherein the surface to be scanned is scanned in a main scan direction with n x m light beams by a deflection scanning operation of the deflecting means; an.aperture stop provided between the beam synthesizing means and the deflecting means, wherein principal rays of the n x m light beams are intersected at a position of the aperture stop, and the light beams which are adjacent to each other in a sub-scan direction on the surface to be scanned are the beams emitted from different ones of the light source means.</p> |
