Image forming apparatus with optical adjustors

A color image forming apparatus, comprising:

• a first photoreceptor having a first image carrying surface;
• a first exposing device, which exposes the first image carrying surface of the first photoreceptor, which forms a first latent image;
• a first developing device, which develops the first latent image to form a first toner image on the first image carrying surface;
• a second photoreceptor having a second image carrying surface;
• a second exposing device, which exposes the second image carrying surface of the second photoreceptor, which forms a second latent image;
• and
• a second developing device, which develops the second latent image to form a second toner image on the second image carrying surface,
• wherein the first exposing device comprises,
• a light source, which emits a light beam,
• a deflector, which deflects the light beam on the first image carrying surface for making a scanning line,
• a first optical system, which is provided between the deflector and the first image carrying surface, and focuses the light beam on the first image carrying surface, and
• a first adjustor, which adjusts an alignment between the first optical system and the first image carrying surface for correcting variation of lateral magnification in the primary scanning direction of the first optical system so that the first toner image and the second toner image are superposed on a recording sheet.