| 摘要 |
PURPOSE:To reduce the color deviation based on misregistration of a copy picture, by intercepting high frequency components in a scanning light by a color filter to extend the width of sticking of a yellow toner when the development is performed with the yellow toner. CONSTITUTION:A blue filter 52 of a color filter 5f consists of a low pass filter which has many granular projections different in refractive index on the surface. Under the control of a microcomputer 19, a photosensitive drum 6 is exposed to the light transmitted through a green filter 51 at the first original scanning time, and the development is performed with a magenta toner. The photosensitive drum 6 is exposed to the light transmitted through the blue filter 52 at the second original scanning time, and the development is performed with the yellow toner, and the width of sticking of the yellow toner is increased because high frequency components are cut. The photosensitive drum 6 is exposed to the light transmitted through a red filter at the third original scanning time, and the development is performed with a cyan toner, and transfer and fixing are performed. Thus, the color deviation due to misregistration of the copy picture is reduced. |
