Design of a simple experiment for liquid refractive index measurement by the double dark ring effect

Xiangshu Liu; Qicheng Chen; Maoli Yang

doi:10.1117/12.2667768

6 March 2023 Design of a simple experiment for liquid refractive index measurement by the double dark ring effect

Xiangshu Liu, Qicheng Chen, Maoli Yang

Proceedings Volume 12553, Fourth International Conference on Optoelectronic Science and Materials (ICOSM 2022); 1255316 (2023) https://doi.org/10.1117/12.2667768
Event: 2022 4th International Conference on Optoelectronic Science and Materials (ICOSM2022), 2022, Henfei, China

Abstract

The refractive indices of liquids were measured in this study by designing an experiment using the “double dark ring” effect produced by the liquid membrane between two glass plates. The refractive indices of Coca-Cola, 25.5% sodium chloride (NaCl) solution, and saturated sucrose solution were separately measured with the formula method and the graphical method. The results showed that the refractive indices of liquids measured by the formula method were more accurate. The measured values were 1.3515, 1.3999, and 1.5230, respectively, and the relative errors with those measured by the Abbe refractometer were 0.208%, 0.391%, and 0.658%, respectively. Due to its many advantages, including the small amount of the liquid to be measured required, low experimental cost, easy and repeatable operation, and high accuracy, this method can serve as an important approach to study the liquid refractive index in the future.

Citation Download Citation

Xiangshu Liu, Qicheng Chen, and Maoli Yang "Design of a simple experiment for liquid refractive index measurement by the double dark ring effect", Proc. SPIE 12553, Fourth International Conference on Optoelectronic Science and Materials (ICOSM 2022), 1255316 (6 March 2023); https://doi.org/10.1117/12.2667768

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