用迈克尔逊干涉法测透明液体浓度

Measurement of the Density of Transparent Liquids with Michelson Interferometry

本文对迈克尔逊干涉仪进行了微小改进并结合光电传感器及单片机技术设计了一种用于测量透明液体浓度的实验装置。利用该装置测量了不同浓度的糖水和盐水的折射率,并对实验数据进行处理及误差分析,同时拟合出液体浓度与折射率之间的线性方程。该装置实验现象明显,测量方法简单,测量数据精度高,适用于透明液体样品的浓度的测量,具有较好的推广价值。

A slight improvement on the Michelson interferometer is presented and designs an experimental device for the measurement of the density of transparent liquids is designed with photodetectors and microcontroller technology.The device is used to measure the refractive indices of sugar water and salt water of different density.The experimental data was processed and analyzed for errors.A linear equation was fitted between the liquid density and refractive index.The experimental phenomenon of the device is obvious.The measurement method is simple,and the measurement data accuracy is high.The device is suitable for measuring the density of transparent liquid samples and is worth being popularized.