Development of a refractive index measurement system for vacuum pressure measurement

2021 ◽  
Vol 78 (2) ◽  
pp. 124-129
Author(s):  
Han Wook Song ◽  
Jong Ho Kim ◽  
Sam Yong Woo
Keyword(s):  
Refractive Index ◽  
Measurement System ◽  
Pressure Measurement ◽  
Vacuum Pressure ◽  
Refractive Index Measurement ◽  
Index Measurement

scholarly journals Liquid Refractive Index Measurement System Based on Electrowetting Lens

Micromachines ◽  
2019 ◽  
Vol 10 (8) ◽  
pp. 515 ◽  
Author(s):  
Shi-Long Li ◽  
Zhong-Quan Nie ◽  
Yan-Ting Tian ◽  
Chao Liu
Keyword(s):  
Refractive Index ◽  
Measurement System ◽  
Incident Light ◽  
Image Plane ◽  
Image Sensor ◽  
Measurement Range ◽  
Driving Voltage ◽  
Refractive Index Measurement ◽  
Index Measurement ◽  
Potential Applications

In this paper, a liquid refractive index (LRI) measurement system based on an electrowetting lens was proposed. The system is composed of a light source, a collimating lens, a liquid measurement chamber (LMC), an electrowetting lens and an image sensor, which is integrated into a cylindrical cavity. The refractive index of the LMC changes with the addition of the measured liquid, and the incident light cannot be focused on the image plane. By adjusting the driving voltage of the electrowetting lens, the curvature of the liquid-liquid interface changes to focus the incident light onto the image plane. The refractive index of the liquid could be measured according to the voltage value. The proposed LRI measurement system has no mechanical moving parts, and the imaging surface remains stationary, which can make the measurement simply and correctly. The experiments show that the refractive index measurement range of the system can be turned from ~1.3300 to ~1.4040, and the measurement accuracy is 10−4. The system can be used to measure the optical properties of liquids and has broad potential applications in chemical reagent detection and pharmaceutical testing.

Refractive Index Measurement System of Liquid Based on Surface Plasmon Resonance

2015 ◽  
Vol 35 (5) ◽  
pp. 0512002
Author(s):  
陈强华 Chen Qianghua ◽  
刘景海 Liu Jinghai ◽  
罗会甫 Luo Huifu ◽  
何永熹 He Yongxi ◽  
罗军 Luo Jun ◽  
...  
Keyword(s):  
Refractive Index ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Measurement System ◽  
Plasmon Resonance ◽  
Refractive Index Measurement ◽  
Index Measurement

scholarly journals Thickness and Refractive Index Measurement System for Multilayered Samples

IEEE Access ◽  
2021 ◽  
Vol 9 ◽  
pp. 21474-21480
Author(s):  
Chien-Sheng Liu ◽  
Tzu-Yao Weng
Keyword(s):  
Refractive Index ◽  
Measurement System ◽  
Refractive Index Measurement ◽  
Index Measurement
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