| 摘要 |
PURPOSE:To obtain a sealing type carbon dioxide gas laser tube characterized by high laser output power and a long life, by using platinum nickel alloy for cathode. CONSTITUTION:By adding nickel, which can resist sputtering, to platinum, it is recognized that the sputtering can be suppressed to a considerable extent without extremely imparing oxidizing catalytic action of the platinum. As a result of using the platinum nickel alloy as the cathode 5 of the sealing type carbon dioxide laser tube, the long life of the sealing type carbond dioxide gas laser tube can be realized, even though the laser output power is reduced to some extent in comparison with the case the platinum is used as the cathode. The laser output power and the life of the sealed type carbon dioxide gas laser tube depend on the quantity of addition of the nickel, but they are contrary matters to each other. Therefore it is recommended that the quantity of the nickel addition is selected so as to meet the purpose. As for the electrode shape, a circular cylinder shaped electrode is usually employed. However, effect is not impaired even in a circular column shape or in the other shapes. |
