| 摘要 |
A multibeam scanning device comprise a plurality of first optical systems that include a light source unit for emitting a non parallel light and an optical element which has a predetermined power and affects the light emitted from the light source unit, a second optical system which includes a first deflecting system which is arranged at a subsequent stage of each first optical system, in which all of a plurality of laser lights emitted from each of the first optical systems are inputted together, and deflects the laser lights and a common optical system which changes the degree of divergence of the laser lights, and light path shift means for moving an incident light path in parallel through which the laser light emitted from the light source unit is inputted to the optical element. All the light inputted to the first deflecting system are inputted to almost the same position of the first deflecting system and each optical element is arranged so that the light axes of the optical elements intersect at the position one optical element's focal length away from the optical element. |
