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在对激光焊接等离子体特性分析的基础上，针对其内部电子密度分布的三种情况，通过计算机模拟了负透镜效应对激光传输的影响，指出了影响负透镜效应的一些因素。本研究对揭示激光焊接过程的物理本质具有重要意义。
Based on the analysis of the characteristics of laser welding plasma and the influence of the negative lens effect on the laser transmission, three factors affecting the internal electron density distribution are simulated by computer, and some factors that affect the negative lens effect are pointed out. This study is of great significance to reveal the physical nature of laser welding process.