Patent Document ID: 20130278703
Application ID: 13865452
Patent Status: 0

Claim One:
1. An image forming apparatus, comprising: a photoreceptor to be driven to rotate; an optical scanning device comprising: a light source that comprises a first light emitting element which emits a first light beam, a second light emitting element which emits a second light beam, a third light emitting element which emits a third light beam, and a fourth light emitting element which emits a fourth light beam; and a deflection unit configured to deflect the first light beam, the second light beam, the third light beam, and the fourth light beam so that the first light beam, the second light beam, the third light beam, and the fourth light beam scan the photoreceptor, wherein the first light beam and the third light beam form, on the photoreceptor, a first electrostatic latent image corresponding to a first pixel, and the second light beam and the fourth light beam form, on the photoreceptor, a second electrostatic latent image corresponding to a second pixel which is different from the first pixel; an image forming unit configured to develop, with a toner, the first electrostatic latent image and the second electrostatic latent image formed on the photoreceptor by exposing the photoreceptor to the first light beam, the second light beam, the third light beam, and the fourth light beam, and which transfers the toner image formed on the photoreceptor onto a recording medium; and a control unit configured to control the optical scanning device so that a first test image, which is formed by developing the first electrostatic latent image, and a second test image, which is formed by developing the second electrostatic latent images formed, are formed in different places on the recording medium.