现行的人教社高中物理教材中说明光具有波动性的著名的泊松亮斑实验,只有文字和图片,没有现成实验仪器.很多刊物介绍用激光束作为光源来演示,但是激光束需要用透镜来扩束,实验时较麻烦,还会让学生错误的认为亮斑是透镜对光的折射造成的.而且在明亮的教室内做,效果不明显.同时不透光的圆盘的选择很多是用小钢珠,但不易固定和调节.笔者通过长时间的实践,自制了一个简易的泊松亮斑观测仪,该仪器结构简单,取材、制作容易,并且出现的衍射亮斑与课本中的图片几乎一样.1 实验器材 The current PES senior high school physics textbook describes the well-known Poisson bright spot experiment with light fluctuations. There are only words and pictures, and there are no ready-made experimental instruments. Many publications introduce laser beams as light sources to demonstrate, but laser beams require lenses. To expand the beam, the experiment is more troublesome, but also allows students to mistakenly believe that the bright spot is caused by the lens refraction of light. And in the bright classroom to do, the effect is not obvious. At the same time, the choice of opaque disc is many With a small steel ball, but not easy to fix and adjust. The author through a long practice, homemade a simple Poisson bright spot observation instrument, the instrument structure is simple, drawn, easy to make, and the emergence of diffraction spots and textbook pictures Almost the same .1 laboratory equipment