| 摘要 |
PURPOSE:To improve reflection efficiency by adjacently providing small reflecting faces reflecting the light from the base end and tip of a lamp downward from the center of a reflecting plate along the axial direction of the reflecting plate on the inner periphery of the reflecting plate. CONSTITUTION:Many small reflecting faces 24 reflecting the light from the tip and base end of a fluorescent lamp 9 downward from the center of a reflecting plate 10 are adjacently and irregularly provided vertically on the inner periphery of a baffle 22. The lengthy fluorescent lamp 9 is arranged in the reflecting plate 10, and patterns of the small reflecting faces 24 are made different according to their positions in the peripheral direction to satisfy the reflecting function. The reflected light can be wholly reflected to the center, the secondary light and tertiary light are decreased, the downward light flux is increased, and the efficiency of an apparatus is improved. |
