Flash discharge tube and method for producing the same

摘要

In an anode-side assembling process (S1), a first end (12a) of a glass tube (12) is fused to a rearward end of an electrode bar (20) secured to an anode-side lead (18) to produce a primary sealed product (72). In a cathode-side assembling process (S2), a ring-shaped cathode (14) is secured by caulking to a forward end portion of an electrode bar (32) secured to a forward end of a cathode-side lead (22) to produce a cathode member (74). In an assembling process (S3), a second end (12b) of the glass tube (12) of the primary sealed product (72) is fused to a rearward end of the electrode bar (32) secured to the cathode-side lead (22) of the cathode member (74) to produce a xenon discharge tube (10). A trigger electrode (326), which is composed of a transparent conductive film (34), is formed on a surface of the glass tube (12) so that the light-transmissive sealed tube-coating ratio specified by the transparent conductive film (34) is within a range of 5 to 30 %. <IMAGE>