| 摘要 |
PURPOSE:To emit the light reliably and to uniform the distribution of emitted light by providing an enclosed discharge tube, a pair of electrodes for applying voltage and means for applying the high frequency generating voltage. CONSTITUTION:Ionizable gas and metal corresponding with the target light emission spectrum are encapsulated in a long discharge tube 1. Upon application of high frequency voltage from high frequency power source 3 onto a conductive member 2, the rare gas encapsulated in said tube 1 is excited to cause gas discharge thus to heat the tube wall section. Consequently, mercury and other metal in said tube 1 will evaporate to cause discharge thus to emit the light of such spectrum as corresponding with the type of metal. The effective light emission width against the overall length L of discharge tube is large when compared with conventional one. |
