一、引言 菲涅尔双棱镜干涉实验是一个很重要的实验,是波动光学基础实验之一,因此在目前普通物理光学课程中仍然占据重要的地位。但是由于现行教材(1)(2)只注重于理论上的指导,对实验步骤阐述不够具体和缺乏完善的实验方法,存在实验误差较大,而且不稳定的缺陷,影响了它的教学效果。 I. INTRODUCTION Fresnel biprism interference experiment is a very important experiment and one of the fundamental experiments of wave optics. Therefore, it still occupies an important position in the current general physics optics course. However, due to the fact that the current teaching materials (1) and (2) only focus on the theoretical guidance, the experimental steps are not specific enough and the experimental method is not perfect, there is a big experimental error and the instability, which affects its teaching effect.