Patent ID: 8493425

Claim:
An image forming apparatus that develops an electrostatic latent image formed on a photosensitive member being rotating, using toner, to thereby form a toner image, comprising: a light source configured to emit a light beam for forming the electrostatic latent image on the photosensitive member; a rotary polygon mirror configured to deflect the light beam such that the light beam moves on the photosensitive member in a predetermined direction; and a light source control unit configured to control the light source, wherein the light source comprises a plurality of light emitting points for emitting light beams, the light emitting points being arranged such that the light beams emitted from the light emitting points and deflected by the rotary polygon mirror are irradiated onto respective different positions on the photosensitive member in a direction of rotation of the photosensitive member, and wherein the light source control unit controls the light source such that a light amount of either or both of outermost beams of the light beams, at respective opposite ends in the direction of rotation of the photosensitive member, in a case where the rotary polygon mirror is rotating at a first speed, becomes smaller than the light amount of either or both of the outermost beams of the light beams, in a case where the rotary polygon mirror is rotating at a second speed that is lower than the first speed.