JPS6444467A - Copying device - Google Patents

Abstract

PURPOSE:To eliminate the need for the consideration of deviation in position and timing since light from a light source for erasing unnecessary charge of a photosensitive body passes through the same optical path as exposure light by providing the said light source on the side of an original while putting the lens of an exposure optical system between the light source and the photosensitive body. CONSTITUTION:The photosensitive body 11 rotates counterclockwise and passes an eraser lamp 12 and an electrostatic charger 13 so as to be uniformly electrostatically charged, and it is exposed in terms of image by the exposure optical system 10 to form an electrostatic latent image on a surface. The reflected light which is radiated on the image from an exposure lamp 2 is reflected on a half mirror 5 and, moreover, mirrors 6, 7 and 9 to reach the photosensitive body 11. The light source 4 for erasing the unnecessary charge is a lamp array arranged in parallel with the exposure source 2 and it can be independently and separately lighted. The light from the lamp array 4 is transmitted through the half mirror 5 and, thereafter, it reaches the photosensitive body through the same path as the exposure light to erase the unnecessary charge. Since the said light passes through the same optical path as the exposure light, the deviation in position and timing does not occur.