| 摘要 |
PURPOSE:To reduce an amt. of light loss by forming three color separated lights using a color mixing fluorescent lamp made by mixing plural kinds of phosphors and two color separation filters. CONSTITUTION:Light sources 3, 4 composed of two fluorescent lamps illuminating the original 2 to be copied are installed below a platen 1 for placing the original 2. These sources 2, 3 obtained by mixing phosphors emitting standard lights at a certain ratio. A mixture of, e.g., a red phosphor made of Y2O3 and Eu, and a green phosphor made of BaMg2Al16O27, Eu, and Mn in a ratio of 82:18 is used for the source 3, and a mixture of a green phosphor made of BaMg2Al16O27 and Eu, Mn or Y2SiO4 and Tb and a blue phosphor made of BaMg2Al16O27 and Eu in a ratio of 60:40 is used for the source 4. |
