In-line refractive index measurement: a simple method based on image detection

被引：0
|
作者：
Bodo, Elisabetta [1 ,2 ]
Gowda, Hitesh G. B.
Wallrabe, Ulrike [2 ]
Wapler, Matthias C. [3 ]
机构：
[1] Univ Pavia, Dept Elect Comp & Biomed Engn, Via Ferrata 5, I-27100 Pavia, Italy
[2] Univ Freiburg, IMTEK Dept Microsyst Engn, Lab Microactuators, Georges Kohler Allee 102, D-79110 Freiburg, Germany
[3] Otto von Guericke Univ, Fac Elect Engn & Informat Technol, Chair Microsyst Med Engn, Magdeburg, Germany
来源：
APPLIED OPTICS | 2023年 / 62卷 / 23期
关键词：
Università degli Studi di Pavia; Ministero dell’Università e della Ricerca; Deutsche Forschungsgemeinschaft (WA 1657/6-2; WA 4555/2-1). The authors thank the Gisela and Erwin Sick Chair of Micro-Optics for use of the refractometer and Professor Sabina Merlo for fruitful discussions on this research;
D O I：
10.1364/AO.493243
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We present a simple method to determine the refractive index of fluids that is suitable for real-time integrated mea-surements by imaging a collimated beam through a fluid volume and determining its diameter on a CMOS sensor. Our experimental results agree with the prediction of our analytical model, and the resulting refractive index agrees with the measurements obtained with a commercial refractometer with an RMS deviation of just & PLUSMN;0.003. This method requires only inexpensive components: a light source, two lenses, and a camera sensor; it is suitable for real-time monitoring, and it is essentially unlimited in the range of refractive indices. & COPY; 2023 Optica Publishing Group
引用
收藏
页码：6282 / 6286
页数：5
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