| 摘要 |
PURPOSE:To accurately measure a surface potential by calculating the surface potential of a photosensitive body corresponding to a potential signal generated by a potential detecting means according to a correlation operated by an input/output characteristic detecting means and setting image forming conditions corresponding to the surface potential of the photosensitive body. CONSTITUTION:The correlation of the potential signal of the potential detecting means 20 with respect to the surface potential of the photosensitive body is calculated from the potential signal detected by the potential detecting means 20, when the input/output characteristic detecting means 40 applies a different potential on the base material of the photosensitive body 4. Thereafter, a control means 40 operates the surface potential of the photosensitive body corresponding to the potential signal generated by the potential detecting means 20, according to the correlation operated by the input/output characteristic detecting means 40, and sets the image forming conditions corresponding to the surface potential of the photosensitive body. Therefore, an influence caused by the dispersion of the distance of the detecting means 20 with respect to the photosensitive body 4 is not imparted. Thus, a correct surface potential is obtained without especially providing a reference potential, etc., on the surface of the photosensitive body. |
