摘要
基于Edlen公式法理论精度高的特点,采用小型数字传感器测量温度、湿度、大气压等参数,间接计算了空气折射率的值。针对传统方法精度不足的问题,提出利用二等标准铂电阻温度计和气压传感器对数字传感器测量值进行校准和修正的方法,并利用温度值对大气压值进行修正,提高了空气折射率的计算精度。使用修正后的传感器进行测量,结果表明空气折射率的精度达到±5.13×10-8,接近Edlen公式所提的10-8量级的理论精度。与测距法相比,Edlen公式法的空气折射率测量值的准确度为10-7量级,该方法可广泛用于需求小型化空气折射率测量装置的场合。
Based on the high theoretical accuracy of the Edlen formula method, the value of air refractive index is calculated according to parameters, Such as temperature, humidity, and atmospheric pressure, which are measured by the small digital sensor. Aiming at the problem of insufficient accuracy in traditional method, we propose a method based on the second class standard platinum resistance thermometer and the pressure sensor to calibrate and correct the measured values of digital sensors, and use the temperature value to correct the atmospheric pressure, which can improve the accuracy of air refractive index. We use the revised sensor in the measurement, and the experimental results show that the precision of air refractive index reaches to ±5.13×10-8, which is closed to the theoretical accuracy of 10-8 obtained by Edlen formula. Compared with the results of distance ranging method, the accuracy of measured air refractive index reaches to 10-7. The sensors can be widely used in the air refractive index measurement applications which need miniaturization.
作者
吴炳阳
于晋龙
王菊
王文睿
Wu Bingyang;Yu Jinlong;Wang Jux;Wang Wenrui(Laboratory of Optical Fiber Communications, School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China;School of Aeronautics and Astronautics, Zhejiang University, Hangzhou, Zhejiang 310058, China)
出处
《激光与光电子学进展》
CSCD
北大核心
2018年第4期22-28,共7页
Laser & Optoelectronics Progress
基金
国家自然科学基金(61427817)
关键词
大气光学
空气折射率
测量值修正
Edlen公式法
高精度
atmospheric optics
air refractive index
measurement value correction
Edlen formula method
highprecision
