双棱镜干涉实验光路调节复杂，需要注意很多细节，如果不提前加以介绍和解释，学生很难真正将细节理解到位，导致异常实验现象层出不穷.教师授课时先从宏观上给出实验原理，引导启发学生进行实验设计，完成实验光路的搭建，再引导学生注意各器件的摆放位置，观察异常位置导致的实验现象，并探索这些现象的来源. 最后以图解的方式对各种实验现象予以解释，这样可使学生对实验过程有整体性的把握，能更好地达到课程的预期效果.

The adjustment of light path of biprism interference is complicated，and there are many details for operating to notice，it is difficult for students to understand these details about experiment if teacher does not introduce and explain these details，and students often obtain abnormal experimental phenomena. Teacher presents the experimental principles through macro view，consciously heuristic students establish optical set-up，and finds out the origin of the abnormal experimental phenomena. Finally，teacher explains the abnormal experiment images. As a result，students can take the experiment process as a whole，and achieve experimental expectations.