| 摘要 |
PURPOSE:To realize power saving by providing plural pieces of light emitting lamps along the light emitting centers in the longitudinal direction of one reflecting plate, so that plural pieces of lamps are controlled at to its number of pieces of lighting in accordance with an exposure means. CONSTITUTION:12 pieces of spherical halogen lamps 2 are installed in parallel as pairs, and lamps L111-L116 are installed in the vicinity of lamps L101-L106, respectively. As for a main reflecting plate 3 of the lamp 2, the section being vertical in its longitudinal direction forms an ellipse or a parabola, and lamp light emitting parts are placed in parallel on a focal line of its reflecting plate surface. A white diffusing surface 9 is formed so as to contact the inside surface of the main reflecting plate 3, an opposed reflecting plate 3-1 is installed so as to be opposed to the main reflecting plate 3, light beams from the lamp 2 and the reflecting plate 3 are reflected and the original surface is illuminated. An illuminance correcting plate 10 is multi-divided and provided along the longitudinal direction of the other end edge of the reflecting plate 3-1, and the position of the plate 10 is adjusted so that a light distribution to the original surface becomes uniform by the lamps L101-L116 and the multi-divided illuminance correcting plate 10. |
