| 摘要 |
PURPOSE:To make possible copying of even an original stuck the tapes for preventing copying by providing a translucent lighting surface between the translucent reflection mirror in the optical path of effective luminous flux and a light soruce, and making the lighting luminous flux and effective luminous flux optically the same. CONSTITUTION:An imaging lens 18 and a translucent reflection mirror 19 are disposed between a reflection mirror 16 and a photosensitive drum 17, and a light soruce 20 is provided in the position where the effective luminous flux r1 to the drum 17 and the luminous flux r2 reflected by the reflection mirror 19 align. Also, a translucent lighting surface 22 is provided in proximity to the light soruce 20, and the lighting luminous flux r2 and the effective luminous flux r1 are made identical. With this constitution, the light of the light source 20 irradiates the original stuck the tapes 1 for preventing copying and the reflected light passes through the same optical path as that of the incident luminous flux by the effect of the glass beads (b) of the tapes 1, and is imaged on the drum 17. Thereby, even the original stuck the tapes for preventing copying is copied. |
