Glass flash tube

摘要

A xenon flash tube is disclosed utilizing a particular borosilicate glass for the lamp envelope which is sealed directly by hermetic seal to inleads of a metal alloy predominantly of iron, nickel and cobalt. Additionally, said flash tube employs particular electron emission means in the form of a porous sintered body of refractory metal having an electron emissive material dispersed therein. This flash tube construction can be operated at reasonably high energy loadings for an extended number of flashes without experiencing significant light output deterioration.