Patent ID: 6853817

Claim:
A correction method of a control mechanism which includes image forming means for forming a toner image, a light emitting element for emitting light toward a predetermined toner image formed by the image forming means, a first light receiving element for receiving regular reflection light caused by a light emission of the light emitting element, and a second light receiving element for receiving diffuse reflection light caused by the light emission of the light emitting element, the control mechanism controls an image forming condition of the image forming means on the basis of a corrected output obtained from an output of the first and second light receiving elements, said correction method comprising the steps of: forming a toner image for correction by the image forming means; detecting, by the first and second light receiving elements, diffuse reflection light caused when the light emitting element emits light toward the toner image for correction; and correcting the corrected output on the basis of outputs of the first and second light receiving elements obtained in said detecting step.