| 摘要 |
PURPOSE:To prevent occurrence of a ghost, by providing an optical attenuation filter on the optical path between a color correcting filter and the exposing surface of a photosensitive material. CONSTITUTION:A colored original on platen glass 1 is exposure-scanned by a light source 2 which moves in the direction (a) at a uniform speed and the image light beams obtained by reflection are made incident on an exposure window 7 through mirrors 3-5 united with the light source 2 in one body and a lens system 6. The 1st and 2nd filter plates 64 and 65 and a diaphragm 66 are provided at the principal point 63 of image forming lenses 61 and 62 arranged along an optical path (c) and an optical attenuation filter 67 is provided between the 2nd filter plate 65 and exposure window 7. The optical attenuation filter 67 is used for attenuating the re-reflecting part of the light transmitted by the filter 67 and reflected by the surface of the glass fitted in the exposure window 7 and lowers the color temperature of the re-reflecting light. Therefore, this filter 67 becomes a secondary light source and no images are formed on the photosensitive surface of a photosensitive material. Thus occurrence of ghosts can be prevented. |
