孔径光阑、视场光阑以及渐晕光阑的教学设计

Teaching design of aperture stop,field stop and vignetting stop

光阑是工程光学这门课当中非常重要的一个知识点。其中孔径光阑、视场光阑以及渐晕光阑又是三种最常见的光阑,如何正确理解三者的定义和作用,并了解三者之间的联系与区别是教学难点。通过对教学以及考试环节的多年总结,提出在教学过程中不仅要重视三者的定义,同时也要注意把三者联系起来,在共性当中分析三者的差异,这样有助于学生正确理解光阑。

Stopis a very important knowledge point in the course of engineering optics.Among them,aperture stop,field stop and vignettingstop are the three most common stops.How to correctly understand the definition and function of the three ones,and understand the connection and difference between them is a teaching difficulty.By summarizing the experiences in years of teaching and examination,it is proposed that not only the definition of the three apertures should be paid more attention in the teaching process,but also the connections between them should be emphasized,such as analyzing the differences between them on the basis of their commonality.It is found that such an analysis helps students to understand the stop concept correctly.