以往在晶体光学教学过程中,有时发现学生有认为在两个平行偏光镜下观察矿物岩石薄片与在一个偏光镜下观察相同的错误,有时甚至一些已非在学的其他同志也有此种错觉,他们就是忽略了平行偏光镜间的干涉作用。因此特在此提出谈谈,与大家讨论,以求在这方面得到较深的了解。以下所述,首先说明这种干涉作用的产生原理,以后则谈一谈这方面的实用意义,希望得到别的同志的批评和指正。 In the past, in the process of crystal optics teaching, students were sometimes found to think that observation of mineral rock flakes under two parallel polarizers was the same as that observed under one polarizer, and sometimes even some other gurus who were not studying had the illusion that they Is to ignore the interference between parallel polarizer effect. Therefore, Special Representative here proposed to discuss and discuss with everyone in order to get a deeper understanding in this regard. As described below, the principle of the production of such interference will be explained first. Afterwards, we will talk about the practical significance in this respect and hope that other comrades will criticize and correct it.