| 摘要 |
PROBLEM TO BE SOLVED: To solve such a problem that an operation state cannot be precisely detected because there are individual differences in a circuit structure of a drive part and because a driving current supplied to a detection element not used for image formation from each drive part based on a common setting value is minutely different.SOLUTION: A detection means detects a state of a detection element. A first drive means controls the light amount of a light beam to be emitted by a first light emitting element based on the state of the detection element detected by the detection means. A second drive means controls the light amount of a light beam to be emitted by a second light emitting element based on the state of the detection element detected by the detection means. |
