Image forming apparatus

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.

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 speed control unit configured to control a rotational speed of the photosensitive member to form the toner image at a first magnification or at a second magnification which is larger than the first magnification, such that when the toner image is to be formed at the first magnification, the rotational speed of the photosensitive member is made higher than when the toner image is to be formed at the second magnification;
• and
• a light source control unit configured to control the light source such that a light amount of the light beam for forming the toner image at the first magnification becomes smaller than the light amount of the light beam for forming the toner image at the second magnification.

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;
• a speed control unit configured to be operable when the toner image is to be formed at a first magnification or at a second magnification which is larger than the first magnification, to control a rotational speed of the photosensitive member to a first speed to form the toner image at the first magnification, and control the rotational speed of the photosensitive member to a second speed which is lower than the first speed, to form the toner image at the second magnification;
• 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 photosensitive member is controlled to the 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 photosensitive member is controlled to the second speed.