放电参数对无极灯发光效率影响的时域有限差分法分析

Analysis of Discharge Parameters Influence on Luminescence Efficiency of Electrodeless Discharge Lamps by Finite Difference Time Domain Method

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,相比传统光源具有光效高、寿命长、无频闪、显色性好、启动快、节能高效等优点。为研究放电参数对无极灯发光效率的影响,本文采用时域有限差分法(Finite Difference Time Domain,FDTD)建立3D模型,仿真分析光源频率、气体压力等参数对无极灯发光效率的影响。研究表明,无极灯发光相对强度随光源频率、气体压力呈现近似于正态分布的变化规律,上述研究结论对无极灯光效优化设计提供有益的借鉴。

As a new kind of light source, electrodeless discharge lamps, which are based on high frequency electromagnetic induction and gas discharge, have the advantage of high efficiency, long life, no stroboscop- ic, quick start, and energy saving compared with the traditional light sources. This paper used the finite difference time domain （FDTD） method to establish the 3D model to analyze the discharge parameters, es- peciaUy the gas pressure and the frequency of the stimulus source influence on the luminescence efficiency of electrodeless discharge lamps. The simulation results show that the relative emission intensity of light source distributes in a nearly normal fashion with the variation of the parameters mentioned above separately.