| 摘要 |
PURPOSE:To make a device small-sized and simple and perform blank exposure with high reliability by providing a shutter which intercepts and opens selectively the optical path between a photosensitive body and a light source which illuminates originals and using the light source for illumination as well as blank exposure. CONSTITUTION:A reflective shade 71 of a lamp 61 is provided with a slit 71' which has a length to cover the overall width of a photosensitive body 1', and a shield member 31 of a discharger 3' is provided with an aperture part 31' so that the exit light from the slit 71' is made incident on the photosensitive body 1'. A light shielding plate 16 is provided in the optical path between the slit 71' and the aperture part 31', and the plate 16 is shunted to the position indicated by a broken line at a blank exposure time to make blank exposure possible; but when a latent image of the original is formed, the plate 16 is arranged in the position indicated by a solid line, and therefore, the light passing the slit 71' is shielded from an image forming area (b) of the photosensitive body 1', and meanwhile, the image of the original is led to the area (b) through a small focusing element array to form an electrostatic latent image. |
