Spectrally resolved interferometry to measure thickness and refractive index of transparent material

2021 ◽  
Author(s):  
Jing Wang ◽  
Yang Lu ◽  
Xiongxin Sun ◽  
Liandong Yu
Keyword(s):  
Refractive Index ◽  
Transparent Material ◽  
Spectrally Resolved

scholarly journals Spectrally Resolved White Light Interferometry for NaCl Aqueous Solutions Refractive Index Measurement

2021 ◽  
Vol 9 ◽  
Author(s):  
Igor G. Likhachev ◽  
Vladimir I. Pustovoy ◽  
Boris A. Usievich
Keyword(s):  
Refractive Index ◽  
Refractive Indices ◽  
White Light Interferometry ◽  
Salt Solutions ◽  
Refractive Index Measurement ◽  
Low Concentrations ◽  
Index Measurement ◽  
Different Types ◽  
Spectral Detection ◽  
Spectrally Resolved

In this work, a technique for comparing refractive indices for solutions of low concentrations has been developed. The method of direct spectral detection developed by the authors has been using. The solutions of low and ultra-low NaCl concentrations were compared with each other, as well as with the respective water controls. The solutions were prepared using the method of serial dilution with different types of mixing at each step: conventional stirring or intensive shaking. Measurements were made for water solutions of NaCl subjected to 6–12 and 30 hundredfold dilution, as well as for water controls, i.e. water subjected to the same technological procedure as the tested salt solutions.

Application of Digital Image Correlation in Measuring Refraction Index of Transparent Material

2015 ◽  
Vol 723 ◽  
pp. 727-731
Author(s):  
Zhao Yang Ma ◽  
Ben Ning Qu
Keyword(s):  
Refractive Index ◽  
Digital Image Correlation ◽  
Digital Image ◽  
Refraction Index ◽  
Image Correlation ◽  
Transparent Material ◽  
2D Digital Image Correlation ◽  
Speckle Patterns ◽  
Index Value ◽  
Plane Displacement

This article describes a method to measure the refraction index of transparent material by combining the characteristics of transparent material with 2D digital image correlation. The method established the relationship between refraction index and in-plane displacement of speckles using the refraction principle. In-plane displacement can be calculated by the 2D digital image correlation directly. Refractive index of PMMA were obtained by speckle patterns which were recorded by single camera. Results showed that the calculation is very close to the existing PMMA material refractive index value that proved the feasibility and the effectiveness of the method. Of course, this method also can be used to calculate the thickness of the transparent material to widen its using fields.

Ultrafast Spectrally Resolved Photoinduced Complex Refractive Index Changes in CsPbBr3 Perovskites

ACS Photonics ◽  
2019 ◽  
Vol 6 (2) ◽  
pp. 345-350 ◽  
Author(s):  
Ronnie R. Tamming ◽  
Justinas Butkus ◽  
Michael B. Price ◽  
Parth Vashishtha ◽  
Shyamal K. K. Prasad ◽  
...  
Keyword(s):  
Refractive Index ◽  
Complex Refractive Index ◽  
Index Changes ◽  
Spectrally Resolved
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