HIGHHPRESSURE SODIUM VAPOR DISCHARGE LAMP

摘要

PURPOSE:To provide a high-pressure sodium vapor lamp inclinding an Al3O3 emission tube, in which Nb is disposed to piece through an electrode-supporting end plate of ceramic and the Al2O3 emission tube is bonded tightly and in which a starting auxiliary electrode is optionally disposed and a high breakdown voltage is maintained between this auxiliary electrode and a main electrode.