基于等厚干涉原理的液体折射率测定装置

An apparatus to measure the liquid refractive index with principle of equal thickness interference

设计了由一块等腰梯形玻璃棱镜和一块平玻璃板组成的"积木式"劈形膜构件,借助于常规的读数显微镜和单色平行光源,就可以方便地利用等厚干涉原理测量透明液体的折射率.结果表明这种测量装置物理思路清晰、操作简便、重复性好、测量精度高,适合在高校的光学实验室推广.

A wedge-shaped optical component in the form of cordwood system is designed, which is constructed by an isosceles trapezoid glass prism and a glass plate. With this apparatus, we easily test the liquid refractive index according to the principle of equal thickness interference by using a conventional reading microscope and a parallel monochromatic light source. The results show that this apparatus has clear physical meaning, good repeatability, highly precise. It is easy to be operated thus well suited to be popularized in optical laboratories of universities.