The microwave electrodeless ultraviolet light source is a kind of ultraviolet light source that emits light through ionization in the high-energy microwave field. Its lamp tube has neither filament nor electrode, and only a small amount of inert gas is filled into the ultrahigh vacuum high-purity quartz glass tube. Because it has no electrode, there is no slow gas leakage phenomenon when the electrode wire is fused with the glass when the electrode is sealed with quartz glass. Because it has no filament, there is no problem that the number of starts of the lamp is inversely proportional to the life of the lamp So at present, the electrodeless ultraviolet light source and microwave ultraviolet light source are the light sources with a long life in the world.
The microwave electrodeless ultraviolet lamp is mainly composed of the driving power supply, magnetron, microwave waveguide, resonant cavity, lamp tube and shielding network. The magnetron is a microwave source, which converts the electric energy provided by the driving power supply into microwave energy, which is output by the microwave antenna, and then output to the electromagnetic resonance box through the waveguide (ordinary metal box, conventional iron box, stainless steel box, aluminum box, etc.) The microwave in the resonance box will fill the whole box due to reflection and refraction, that is to say, the whole box is a high energy microwave area. The inert gas in the electrodeless lamp tube located in this area will ionize and excite 140 nm -- 400 nm ultraviolet light.