无极灯是一种基于高频电磁感应和无极气体放电的新型电光源, 由Hg 253.7 nm共振谱线激发荧光粉进而发出可见光。 通过原子发射光谱分析, 实验研究了铟网位置对Hg 253.7 nm共振谱线的影响规律。 研究发现, Hg 253.7 nm共振谱线的相对强度, 当铟网位于耦合线圈两端时最强, 位于耦合线圈中部时较弱, 远离耦合线圈时最弱。 并推断, 存在一个最佳的铟网位置, 对应最高的发光效率。 结合Maxwell 3D有限元仿真, 从气体放电角度对实验结果进行了定性分析, 对无极灯模型设计与参数优化具有指导意义。

As a kind of new electric light source, electrodeless discharge lamps (EDL) are based on high-frequency electromagnetic induction and nonpolar gas discharge. Visible light is emitted as a result of Hg 253.7 nm resonance spectrum line inspiring phosphor. The influence of indium net position on the Hg 253.7 nm resonance spectral line was studied experimentally by atomic emission spectral analysis. It was found that the relative intensity of Hg 253.7 nm resonance spectral line is strongest when the indium net is located at both ends of coupling coil, weaker at middle and weakest when far away from coupling coil. It was inferred that there is an optimum indium net position for EDL, and the corresponding lighting effect is maximal. The results were qualitatively analyzed from the standpoint of gas discharge theory, combined with the finite element simulation of Maxwell 3D, which has instructive value for pattern design and parametric optimization of EDL.