| 摘要 |
PURPOSE:To improve the luminous output of a lamp, by installing a nonelectrode discharge lamp, sealing halogen mercury and rare gases inside its own bulb made up of an ultraviolet transmittible material, in a resonator being field-coupled with a waveguide, while installing another nonelectrode discharge lamp as well at the side of a feeder port. CONSTITUTION:A magnetron 1 generates microwaves which are led into a waveguide 2. A microwave cavity resonator 3 consisting of a lightreflective member 4 and a metallic mesh 5 is field-coupled with waveguide 2. A nonelectrode discharge lamp 7 is formed up by way of sealing halogen mercury and rare gases in its own bulb made up of an ultraviolet transmittible material and disposed inside a cavity 3. Another nonelectrode discharge lamp 8 is formed up by way of sealing halogen mercury and rare gases in its own bulb made up of an ultraviolet transmittible material as well and disposed in position adjacent to a feeder port 6 inside the cavity 3. The internal capacity of the lamp 8 is so designed to be smaller than that of the lamp 7 whereby the lamp 8 is lighted by means of a leaking electromagnetic field out of the feeder port 6 and then the lamp 7 is started to glow subsequently. Afterward, most of the microwave energy is absorbed in the lamp 7. |
