| 摘要 |
PURPOSE:To obtain a discharge lamp radiating a red color with high purity by sealing a luminous tube with a specific quantity of sodium halide, halogen, mercury, and starting rare gas respectively. CONSTITUTION:A luminous tube is formed with a translucent heat-resistant material and is filled with sodium halide of 0.5X10<-5>gr atoms/cm<3>-2.5X10<-5>gr atoms/cm<3>, sodium halide of 0.5X10<-7>gr atoms/cm<3>-2.0X10<-7>gr atoms/cm<3>, halogen of 0.5X10<-6>gr atoms/cm<3>-5X10<-6>gr atoms/cm<3>, and starting rare gas against its inner capacity. Then, for example, a pair of bar-like lugs 12, 13 are provided on both sides of the luminous tube 7, and the lugs 12, 13 are located at predetermined positions in a microwave cavity 4 using a suitable lamp support member to discharge and illuminate via microwaves. Accordingly, an electrodeless lamp radiating a red color with high color purity can be obtained. |
