1 Structures and Construction Technology, Faculty of Technology, University of Oulu, Oulu, Finland.
2 Department of Electronics Design, Mid Sweden University, Sundsvall, Sweden.
Appl Spectrosc. 2018 Jun;72(6):908-912. doi: 10.1177/0003702818756660. Epub 2018 Feb 14.
The refractive index is a fundamental physical property of a medium, which can be used for the identification and purity issues of all media. Here we describe a refractive index measurement technique to determine simultaneously the refractive index of different solid particles by monitoring the transmittance of light from a suspension using a charge-coupled device (CCD) camera. An important feature of the measurement is the liquid evaporation process for the refractive index matching of the solid particle and the immersion liquid; this was realized by using a pair of volatile and non-volatile immersion liquids. In this study, refractive indices of calcium fluoride (CaF) and barium fluoride (BaF) were determined using the proposed method.
折射率是介质的基本物理特性，可用于所有介质的识别和纯度问题。在这里，我们描述了一种折射率测量技术，通过使用电荷耦合器件 (CCD) 相机监测悬浮液的光透过率，可同时确定不同固体颗粒的折射率。测量的一个重要特点是用于固体颗粒和浸液折射率匹配的液体蒸发过程；这是通过使用一对挥发性和非挥发性浸液来实现的。在本研究中，使用提出的方法确定了氟化钙 (CaF) 和氟化钡 (BaF) 的折射率。
