本文结合光电信息科学与工程专业的特点，以“光线”和“高斯光束”的推导为例，探索关于自由空间中光传输理论模型的内在联系的教学，实践证明这种方法对于学生理解关于光传输的后续课程非常必要，为工科专业基础理论课的课程教学提供一定参考.

Combined with the characteristics of Optoelectronic Information Science and engineering specialty and taking the derivation of “light” and “Gaussian beam” as an example, this paper explores the teaching of the internal relationship of the theoretical model of light transmission in free space. Practice has proved that this method is very necessary for students to understand the follow-up courses on light transmission, and provides a certain reference for the teaching of basic theory courses of engineering specialty.