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本文介绍了用迈克逊干涉仪测量液体折射率的方法，原理简单。在干涉仪导轨上平放一方形玻璃容器，内装待测液体，动镜铅垂地浸没在液体中。通过测出动镜在液体内的移动量及其相应的干涉条纹变化数，就能计算液体的折射率，有较高的测量精度。本文详细分析了干涉仪上分光板的反射光通过空气、玻璃、液体，由反射镜反射后出现的多个反射光点，只有通过对这些反射光点的调节，才能得出干涉条纹并符合计算公式的要求。
This article describes the use of the Michelson interferometer method of measuring liquid refractive index, the principle is simple. Placing a square glass container on the interferometer rail, containing the liquid to be measured, the moving mirror immersed vertically in the liquid. By measuring the amount of movement of the moving mirror in the liquid and the corresponding number of interference fringes change, the refractive index of the liquid can be calculated, and the measurement accuracy is high. This paper analyzes in detail the reflected light from the light splitting plate on the interferometer through the air, glass, liquid, reflected by the reflector reflected a number of points, and only through the adjustment of these reflected light spots in order to obtain interference fringes and in line with the calculation Formula requirements.