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| Design and Implementation of High Precision Air Refractive Index Measurement System |
| MIN Shuai-bo1,2,YAN Li-ping1,CUI Jian-jun2,WANG Dong3,SHU Hong-lin4,CHEN Kai2 |
1.Laboratory of Nanometer Measurement Technology, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
2. National Institute of Metrology, Beijing 100029, China
3. Academy of Precision Instruments and
Photoelectronics Engineering, Tianjin University, Tianjin 300072, China
4. School of Mechanical and Power, Henan Polytechnic University, Jiaozuo, Henan 454000, China |
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Abstract Aiming at commercial air refractive index measuring device is affected by the acquisition performance of sensor and the accuracy of calculation formula, and its actual measurement accuracy is low. Based on portable multi-environmental parameter acquisition device, a set of air refractive index measurement system is designed to collect the information of temperature, humidity and atmospheric pressure in the environment. Error analysis of three indirect refractive index measurement formulas is carried out, and performance comparison with commercial environmental compensator is made. The experimental results show that under the experimental conditions of pressure 100.17~100.21kPa, temperature 21.1~21.9℃ and humidity 45.9~58.0% RH, the measurement error of the system is 2.69×10-7 lower than that of the commercial environmental compensator.
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Received: 31 July 2019
Published: 02 November 2020
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2020, Vol. 41 
