| 摘要 |
PURPOSE:To omit a filter layer in each light source to attain space saving and cost down by using a filter layer for cutting off light with harmful wavelength to the characteristics of a photosensitive body out of radiated beams as a light guide for guiding radiated beams from the light source. CONSTITUTION:The light guide for guiding radiated beams from the light source such as an erasing lamp 20 or a destaticizing lamp 21 is formed as a filter layer (filter material) for cutting off the light with <=500nm harmful wavelength to the characteristics of the photosensitive body out of said radiated beams. When a start button is depressed, the photosensitive body 1 is uniformly charged by an electrostatic charging device 18, and when the charged part on the photosensitive body 1 reaches an exposure part, an original image on a contact glass 8 is projected on the photosensitive body 1 through a mirror 10, a lens 11 and a mirror 12. Although light is radiated from the erasing lamp 20 or the destaticizing lamp 21, the light with harmful wavelength is cut off by the light guide (including the light guide 22 for destaticizing) and no bad influence is exerted upon the characteristics of the photosensitive body 1. |
