本文探讨了双透镜在迈克耳孙干涉仪测激光波长实验中的应用及其对实验结果的影响.通过引入双透镜系统，我们分析了光斑大小、环纹数量以及疏密情况的变化，并讨论了如何通过调节透镜间距来调节干涉环纹.实验结果表明，双透镜系统的使用能够显著降低迈克耳孙干涉仪调节的难度，提高实验效率，并对环纹吞吐计数的准确性有所提升．

In this paper, the application of double lens in Michelson interferometer experiment to measure laser wavelength and its influence on experimental results are discussed. By introducing a double lens system, we analyze the variation of spot size, ring pattern number and density, and discuss how to adjust the interference ring pattern by adjusting the lens distance. The experimental results show that the use of double lens system can significantly reduce the difficulty of Michelson interferometer adjustment, improve the experimental efficiency, and improve the accuracy of loop throughput counting.