Patent attributes
A rotational multifaceted mirror (24) deflects a laser light outgoing from a semiconductor laser (21), so that the light scanning device (2) which scans the photoconductive drum (131) has a third optical system (25) having a correction lens (5) whose curvature radii are different on the incident side surface (5a) and the outgoing side surface (5b) in a cross section in the sub-scanning direction which is perpendicular to the main scanning direction. The correction lens (5) is so configured as to be rotatable about a line (L2) which passes through an intersection “a” between an optical axis (L1) of the correction lens (5) and a surface having a curvature radius which is smaller among the surfaces (5a, 5b) and is rotatable about a line (L2) parallel to the main scanning direction.
