| 摘要 |
PURPOSE:To eliminate ghosts produced when a color correction filter is inserted in a picture forming device which is provided with the color correction filter at the principal point section of lenses under a movable state and exposure glass in the exposure window of a photosensitive window, by making the exposure glass oblique to the optical path. 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 a mirror 3 which is united with the light source 2, mirrors 4 and 5 which more in the same direction as the moving direction of the light source 2 at a speed which is half as fast as the moving speed of the light source 2 and are united with each other, and a lens system 6. Image forming lenses 61 and 62 are provided along an optical path (c) and the 1st and 2nd filter plates 64 and 65 and a diaphragm 66 are installed to the principal point section 63 of the lenses 61 and 62. The exposure glass 71 fitted in the exposure window 7 is made oblique to the optical path (c) and, when part of transmitted light is reflected by the glass 71, the reflecting light C' is made to get out of the optical path (c). Therefore, the reflecting light beams from the exposure glass 71 do not reach the filters inserted into the principal point section and occurrence of a ghost can be prevented. |
