| 摘要 |
PURPOSE:To improve the face uniformity of the light output of lamps by arranging multiple lamps in a flat plate-shaped cavity and providing a slender power feeding hole along the axial direction of a wave guide near the center of its wide face. CONSTITUTION:Multiple straight tube type lamps 2 are arranged in a flat plate- shaped cavity 1. Rare gas, metal such as Hg, Cd, Zn, As, or their halogenide, iodine, and heavy hydrogen are sealed in the lamps 2. The microwave power enters the cavity 1 from a microwave power supply 6 through a wave guide 5 and a power feeding hole 4, and the lamps 2 are lit by the high-frequency induction discharge. The feeding hole 4 is slenderly opened so as to connect the center vicinity of the upper face of the cavity 1 and the center axial direction of the wave guide 5. The power is uniformly fed in the cavity 1. The face uniformity of the light output of the lamps can be thereby improved. |
