在几何光学的教学过程中,光路问题贯穿全过程。通常讲到光路时,总是离不开在黑板上画光路图。尽管通过许多事例来说明光路现象的客观存在,但是,学生仍感到很抽象。为了加强教学的直观性,我制作了光路显示器,供初中几何光学教学中使用。显示器能直接显示出各种立体光路现象,无需暗室,全班同学可在自己座位上同时进行观察。 In the teaching of geometrical optics, the problem of light path runs through the whole process. When talking about the light path, it is always impossible to draw a light path on the blackboard. Although there are many examples to illustrate the objective existence of light path phenomena, students are still very abstract. In order to enhance the visual teaching, I made a light path display for use in junior high school geometry and optics teaching. The display can directly show a variety of three-dimensional optical path phenomenon, without the darkroom, the class can be observed in their seat at the same time.