Patent ID: 7911667
Filing Date: 2011-03-22
Classification: H04N

Abstract:
1. A light beam scanning device, comprising: plural light sources that emit light fluxes passing through positions different from each other in a sub-scanning direction; a first optical system that includes a lens having a negative power in the sub-scanning direction; a second optical system that is positioned at a more downstream side than the first optical system in a direction of light beam travel and includes a lens having a positive power in the sub-scanning direction; a support part that has a long hole formed to extend in parallel with an optical axis direction of the second optical system and supports the lens of the second optical system; a guide member that is inserted in the long hole of the support part and guides the support part to be position-adjustable in the optical axis direction; and a rotary deflector that deflects light emitted from the plural light sources and passed by the first and second optical systems and scans the light in a main scanning direction perpendicular to the sub-scanning direction.