| 摘要 |
PURPOSE:To increase the lamp starting performance of a microwave discharging light-source device, which lights a non-electrode lamp through microwaves, by covering a starting auxiliary antenna made of metal with a coating body made of a heat-resisting dielectric, with a space provided between them, in manufacturing the said device. CONSTITUTION:A starting auxiliary antenna 132 made of tantalum wire is covered with a coating body 142 made of quartz glass, with a space provided between the antenna 132 and the body 142, so as to make a starting auxiliary body. Thus made starting auxiliary body is installed in a spherical lamp 6b made of transparent quartz glass. During the discharge, the antenna 132 and the body 142 are heated, and difference arises between the expansion degrees of the antenna 132 and the body 142 due to the difference between their thermal expansion coefficients. However, the above difference of the expansion degree is absorbed by the phenomenon that the antenna 132 curves in the space formed between the antenna 132 and the body 142. Since the space formed between the antenna 132 and the body 142 is made vacuum, any electric discharge doesn't develop between them. |
