| 摘要 |
PURPOSE:To generate a sufficient light emission while use of mercury is suppressed to possible minimum, and to prevent stall. CONSTITUTION:The two ends of a light emitting tube 1 are blocked with blocking pieces 2, 2 which are fitted airtightly using glass solder, and the pieces 2, 2 are penetrated by electricity introducing bodies 3, 3 airtightly with the aid of an adhesive 4 such as glass solder, and electrodes 6, 6 are joined with the blocking pieces 2, 2. An airtight vessel A is formed from these tube 1, blocking pieces 2, 2, and electricity introducing bodies 3, 3, wherein the capacity is 7.1cc. No mercury as a metal for buffer is encapsulated in the tube, but 4.5mg sodium and a rare gas for starting at 26660Pa consisting of xenon gas or penning gas of neon-argon are encapsulated, That is, 0.63mg sodium per cc vessel capacity is encapsulated. |
