| 摘要 |
PURPOSE:To form a copying machine having suitable color reproducibility, by providing an optical filter, and also adjusting a photoelectric variation by said filter. CONSTITUTION:When a changeover switch of color balance for making a red color dark is turned on, a command signal is transferred to a signal processing circuit 53 from an operating part (OPE), a motor 49 is rotated and a gear plate 47 is rotated. On the other hand, a detecting signal obtained by a rotating mark 51 group and a fixed detector 52 is sent to a signal processing circit 53, and when it coincides with selection of prescribed filters 42-45 indicated by the operating part (OPE), a stop signal is sent to a brake 50 and the motor 49, and switching of the filters 42-45 is completed. concretely speaking, a blue filter 44 of a filter device (FT) goes into an optical path and stops, and at the almost same time, the potential control is executed, and thereafter, the quantity of light is controlled, and the automatic exposure control is executed as necessary. Accordingly, in this case, a red color of an original is dark, namely, it is copied blackly, and a copy having no blue color is obtaned. |
