To prolong the life of a xenon fluorescent lamp of this kind by preventing the contact between a central electrode and a phosphor layer, and preventing the damage of the phosphor layer.
A proper number of disks 8 each formed of an insulating member and having a through hole 8a through which a central electrode 6 passes are fixed in the radial direction and provided on the inner diameter of the glass tube 2 of this xenon fluorescent lamp 1. Nodes are provided on the vibration generated on the central electrode 6 by the disks 8 to reduce the amplitude, the resonance frequency of the central electrode 6 is increased, no resonance occurs by external vibration such as the vibration when an apparatus is operated, thereby the contact between the central electrode 6 and a phosphor layer 5 is prevented.
ITO MASARU
TANEMURA KOJI
YASUDA YASUHIDE
SHIMADA KOJI
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