Miniature microwave plasma electrodeless metal halide lamp

Abstract

The invention provides a miniature microwave plasma electrodeless metal halide lamp. The miniature microwave plasma electrodeless metal halide lamp comprises a hollow resonant cavity, a coupling unit, a feed probe which is connected with a solid state microwave source coaxial line, and a bulb. The coupling unit is fixedly arranged inside the resonant cavity through a first opening from top to bottom in an inserting mode. The bulb is arranged at the upper end of the coupling unit. The feed probe is fixedly arranged inside the resonant cavity through a second opening from bottom to top in an inserting mode. The coupling unit comprises a first coupling part, a second coupling part, and a third coupling part, wherein the first coupling part, the second coupling part, and the third coupling part are connected in sequence from top to bottom, both the first coupling part and the third coupling part are cylinders, the second coupling part is a disc, both the diameter of the first coupling part and the diameter of the third coupling part are less than the diameter of the second coupling part, and a through hole which enables the feed probe to penetrate through is formed in the second coupling part. The miniature microwave plasma electrodeless metal halide lamp has the advantages of being low in working frequency, small in size, and easy to manufacture.

Description

【Technical field】 [0001] The invention relates to a plasma electrodeless metal halide lamp, in particular to a miniaturized microwave plasma electrodeless metal halide lamp. 【Background technique】 [0002] In the microwave plasma electrodeless metal halide lamp, the microwave energy generated by the solid-state microwave source is fed into the resonant cavity, and the energy is coupled to the filling in the bulb through the resonant cavity and the coupling unit in the resonant cavity to form luminous plasma. Plasma electrodeless metal halide lamps provide point-like bright white light sources with a continuous spectrum very close to that of natural visible light. This type of microwave plasma electrodeless metal halide lamp has the advantages of no electrode, high luminous efficiency and low light attenuation; microwave plasma electrodeless metal halide lamp needs a large resonant cavity power supply magnetic field energy in the process of coupling energy into the bulb. Res...

AI Technical Summary

Problems solved by technology

This type of microwave plasma electrodeless metal halide lamp has the advantages of no electrode, high luminous efficiency and low light attenuation; microwave plasma electrodeless metal halide lamp needs a large resonant cavity power supply magnetic field energy in the process of coupling energy into the bulb. Resonance, resulting in the microwave plasma electrodeless metal halide lamp has the disadvantages of large size and heavy weight

[0003] To reduce the volume of the microwave resonator cavity, it is possible to fill the cavity with a medium, but this method has two disadvantages: the first is the addition of dielectric materials, which increases processing difficulty and material cost; the second is the addition of microwave dielectric materials, which will lead to resonance The microwave loss in the cavity becomes larger

[0004] Another way to reduce the size of the microwave resonator is to increase the operating frequency of the microwave resonator. This method also has two disadvantages: the first is the increase in the operating frequency, which leads to a decrease in the output efficiency of the solid-state microwave source and an increase in manufacturing costs. ; The second is the increase of the operating frequency, resulting in a larger microwave loss of the conductor and air in the resonant cavity

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