| 摘要 |
PURPOSE:To obtain an image having a stainless white ground part by selecting part of light from a light source, i.e. light with about >=600nm wavelength for uniform exposure. CONSTITUTION:A reflecting plate 5 is provided with a reflecting surface having a long-wavelength light reflection factor low enough to absorb light-wavelength light. In concrete, the reflecting body itself is made of, for example, blue glass, blue plastic, etc., which hardly reflects said wavelength light. In another way, the reflecting surface is provided with a blue film or sheet by sticking or coated with blue paint. This colored reflecting plate which cuts the long-wavelength light and a conventional white plate are used. |
