| 摘要 |
PROBLEM TO BE SOLVED: To provide an image forming device configured to improve image quality.SOLUTION: Near the surface of each of photoreceptor drums, a noncontact displacement gauge for detecting displacement in an x-axis direction and a noncontact displacement gauge for detecting displacement in a z-axis direction are disposed. In each of cylindrical lenses, a piezoelectric device for displacing the cylindrical lens in the z-axis direction is mounted. Each of optical detection sensors outputs a synchronization detection signal, a light quantity monitor signal, and a sub-scanning displacement signal for a corresponding photoreceptor drum. A scanning control device 3022 controls the piezoelectric device, for each of the photoreceptor drums, on the basis of a result obtained by synthesizing the output from the noncontact displacement gauge with the sub-scanning displacement signal from the optical detection sensor. |
