| 摘要 |
PROBLEM TO BE SOLVED: To prevent the sagging down of a diffusion plate and to prevent the degradation of light emission quality. SOLUTION: In this illuminator provided with a light source inside a casing 2 with an opening part and provided with the diffusion plate 5 for diffusing light emitted from the opening part, the light emitting surface 5a of the diffusion plate 5 is formed into a convex shape. |
