Patent ID: 8072478

Claim:
An image forming apparatus comprising: at least one image carrying member; and at least one optical scanning device that scans the image carrying member with a plurality of light beams to write image data on the image carrying member, the optical scanning device including a light source that includes a plurality of light emitting units each emitting a light beam; an optical system that focuses the light beams on the image carrying member as optical spots and scans the image carrying member in a main scanning direction with the light spots; and a correcting unit that corrects, based on a displacement amount of each of the light beams in the main scanning direction, writing energy density at a write position such that a variation in image density due to a variation of the displacement amount is reduced; and wherein the correcting unit corrects the writing energy density such that the writing energy density changes in the main scanning direction; and wherein the correcting unit corrects the writing energy density such that the writing energy density changes from a drawing start position toward a drawing end position of an effective scan area in the main scanning direction.