| 摘要 |
<p>PURPOSE:To raise the uniformity ratio of a luminance in the vicinity of the center and in the vicinity of the end part, by constituting a rise part by inclining the vicinity of both ends of a reflecting late, and constituting plural band-shaped reflecting layers whose reflection factor is lower than that of the reflecting plate, at a prescribed internal so as to be orthogonal to a light source. CONSTITUTION:An inclined rise part 13 is constituted in the vicinity of both ends of a reflecting plate 12 which is installed to the inside of an illuminator body 11, and also, plural band-shaped reflecting layers 16 which are constituted so that its reflection factor is lower than a reflection factor of the reflecting plate 12 are provided at a prescribed interval so as to be orthogonal to a light source 14, in the vicinity of the center of the light source 14. According to this constitution, when a fluorescent lamp 14 is lighted, the reflection factor in the vicinity of the center of the reflecting plate 12 is controlled by the band- shaped reflecting layer 16, and the uniformity ratio of an illuminance of the surface of a diffusion plate 17 is raised.</p> |
