本文介绍了波前函数的概念，并利用波前函数法分析讨论了光的杨氏双缝干涉和薄膜干涉现象.传统光程法在讨论两列波干涉时比较直观简单，但在讨论多列波干涉的情况下，光程法简单性的优势将无从体现.和传统的光程法相比较，在讨论多列波相互叠加时，波前函数法的优势凸显，另一方面，波前函数法充分体现了波动的物理思想，刻画出电磁波的传播和叠加的物理图像，有助于学生深层次理解波动概念.

The concept of wavefront function and its application in Young’s double-slit interference and thin-film interference using the wavefront function method are introduced. In comparison with the traditional light path method discussing the light interference, the wavefront function method fully reflects the physical thought of wave, portrays the physical image of the propagation and superposition of electromagnetic waves, which helps students understand the concept of wave deeply.