| 摘要 |
PURPOSE:To adjust a shading characteristic by a simple structure against a light source whose illumination distribution is different, by clamping the vicinity of a transparent elastic body by a clamping member, and deforming the vicinity of both the ends. CONSTITUTION:When a transparent elastic body 6 is placed between supporting frames 7, 8 and clamped by adjusting screws 9, 10, the frame part is bent and the transparent elastic body 6 is also bent. When a shading unit 11 consisting of the elastic body 6 and the supporting frames 7, 9 is placed between a fluorescent lamp 2 and an original 1 surface, a light is condensed by a convex lens action of the elastic body 6. Ununiformity of the light quantity of the fluorescent lamp 2 is corrected by varying a clamping force of the adjusting screws 9, 10 and adjusting a degree of condensing. Accordingly, a shading characteristic can be adjusted against a light source whose illumination distribution is different, by a simple structure. |
