Abstract: To enable the easy and adequately reliable cleaning of the inner surface of the chamber material, and as a result, to provide a dielectric barrier discharge lamp with good lighting characteristics and simplicity of manufacture, a dielectric barrier discharge lamp having a discharge chamber with a cylindrical, double-tube construction with an outer tube and an inner tube, in which the cylindrical discharge space formed between the outer tube and the inner tube is filled with a discharge gas in which excimer molecules are formed by a dielectric barrier discharge, two or more fluid distribution tube remnants connecting to each discharge chamber. It is preferable that the dielectric barrier discharge lamp described above have two or more fluid distribution tube remnants formed on opposite ends of the discharge chamber.

Abstract: A light source device in which the radiated light from the dielectric barrier discharge lamp can always be stabilized even if the discharge vessel of the dielectric barrier discharge lamp is large or the load on the tube wall within the discharge vessel is small. This is achieved according to the invention by the provision of a light source device having a discharge lamp which has a generally cylindrical, coaxial double-tube arrangement of an outer tube and an inner tube, in which there is an outer electrode on the outer tube, in which there is an inner electrode on the inner tube, and in which a discharge space between the inner and outer tubes is filled with a discharge gas for formation of excimer molecules by a dielectric barrier discharge, and of a power source for operating this discharge lamp in accordance with the relationship: Vs/Vp.ltoreq.0.5 where Vs is the starting voltage and Vp is the voltage applied to the discharge lamp during steady-state luminous operation.

Abstract: To maintain the relative positional relationship between an inner tube and an inner electrode of a dielectric barrier discharge tube having a roughly cylindrical, double tube arrangement of an outer tube coaxially arranged about an inner tube with a discharge space defined therebetween, an outer electrode on an outer surface of the outer tube, an inner electrode on an inner surface of the inner tube, and a discharge gas which forms excimer molecules by a dielectric barrier discharge filling said discharge space, despite repeated expansion and contraction of the inner electrode due to the dielectric barrier discharge lamp being repeatedly turned on and off, according to the invention, the inner electrode is formed of a substantially tubular metal component or the like, and a motion preventing component is provided at opposite ends of the inner electrode for maintaining an axial position of the inner electrode relative to the inner tube.

Abstract: A dielectric barrier discharge lamp having a generally cylindrical double-tube arrangement of an outer tube coaxially disposed about an inner tube, with an outer electrode disposed on an outside surface of the outer tube, an inner electrode disposed on an inside surface of the inner tube, and a discharge space provided between the outer tube and the inner tube which is filled with a discharge gas for formation of excimer molecules by dielectric barrier discharge achieves firm engagement of the inner electrode against the inner tube and a stable discharge over a long time even if part of the electrode corrodes due to the ozone produced or it wears. This is achieved by embodiments in which the inner electrode is a generally tubular part which is slit in an axial direction along the full length thereof. The tubular part can be a single cylindrically sheet having opposite longitudinally extending edges spaced from each other by a gap or overlapped.

Abstract: In a dielectric barrier discharge lamp, in which a discharge vessel, in which a discharge gas forming "excimer" molecules is encapsulated, is provided with a dielectric provided with a netlike electrode and a window, through which the light goes, the first object of the invention is achieved by an arrangement in which a thickness of ends of the above-described netlike electrodes is greater than the average thickness of the entire electrode. Another object of the invention is achieved by an arrangement in which a holder incorporated in the discharge vessel has an outer dimension that is less than/equal to an outer dimension of the netlike electrodes. A further object of the invention is achieved by an arrangement by which the discharge vessel has a hollow cylindrical shape formed from an external tube and an internal tube and a means for hermetic sealing is arranged inside the internal tube.

Abstract: A process for connecting a molybdenum foil to a lead portion with sufficient strength and reliability in which an expensive binder, such as platinum, platinum clad molybdenum, or the like, is not used. According to the invention, a carbon containing or carbon coated molybdenum part is placed between the molybdenum foil and the molybdenum lead portion and then the two are resistance welded to one another. Furthermore, a hermetically enclosed part of a lamp can be produced by this process.