| 摘要 |
PURPOSE:To obtain stereoscopic photograph easily by electrophotography, by using a photoreceptor of specified structure. CONSTITUTION:After forming a first photosensitive layer 2 having sensitivity in the blue light region with selenium evaporated by thickness of 50mum at purity of 99.99% at base temperature of 50 deg.C on an aluminum plate 1 which is a conductive substrate, the plate is let stand in a dark place for a week. On this plate is further formed a second photosensitive layer 3 having sensitivity in the red light region with zinc oxide-resin layer sensitized only with methylene blue coated by thickness of 15mum by dipping method. This plate is used as a photoreceptor P. After primarily charging negatively this photoreceptor P uniformly, positive, uniform secondary charge is applied at such a voltage that leaves part of the negative charge in the surface, and a cube 6 having a defective part of rectangular parallelepiped in one ridge is disposed on the surface of the photoreceptor P with the defective part positioned in the lower right part. The photoreceptor is simultaneously exposed with blue light B from above the vertical direction and with red light R from 45 deg. diection in the right oblique inclination. Then, it is developed with blue and black toners charged positively and negatively, respectively. Thus, a stereoscopic photograph of wide image clearly divided in colors may be formed in a short time and at a low cost. |
