摘要
为了实现利用最小偏向角法对无定形流体的高精度折射率测量,设计了一种全新的恒温空心三棱镜装置,对该装置的光路和恒温组件进行精确设计,将其应用于测量液体折射率,对测量结果和不确定度进行定量分析。首先,通过对三棱镜光学平面的精确设计和加工,实现对测量光线的精准控制。其次,通过对恒温夹套内空心管路的迂回设计,使测量池内液体的温度波动和温场均匀性满足高精度折射率测量要求。最后,将该装置应用于液体折射率测量,定量分析了各影响因素的测量不确定度。实验结果表明:对于水、异辛烷、四氯乙烯3种液体,其折射率测量精度达到10^(-7),测量不确定度可低至10^(-5)。实现了用最小偏向角法对液体折射率的高精度测量。
For high-precision refractive index measurements of amorphous fluids,the minimum deviation angle method was used to design a novel thermostatic hollow trigonal prism device.The optical path and thermostatic compenents of the device are precisely designed.The device can be used not only to measure the refractive index of liquids,but also to quantify the measurement results and uncertainties.Firstly,the precise design and machining of the optical plane helps to precisely control the measurement light.Secondly,the tortuous hollow tube inside the thermostatic jacket is designed,which allows temperature fluctuations and uniformity of the liquid to be sufficient for high-precision refractive index measurements.Finally,the device is applied to measure a liquid’s refractive index,and the measurement uncertainty of each influence factor is quantitatively analyzed.The experimental results show that the refractive index measurement of three liquids,namely water,isooctane and tetrachloroethylene,could achieve an accuracy of 10^(-7)at 10^(-5)of uncertainty.Thus,the device provides a method for highly-precise measurements of the refractive index of liquids.
作者
付兴丽
冯杰
范晓辉
潘梦芸
韦秋叶
FU Xing-li;FENG Jie;FAN Xiao-hui;PAN Meng-yun;WEI Qiu-ye(GuangXi Vocational&Technical Institute of industry,Nanning 530001,China;Guangxi Zhuang Autonomous Region Institute of Metrology&Test,Nanning 530200,China)
出处
《中国光学（中英文）》
EI
CAS
CSCD
北大核心
2022年第4期789-796,共8页
Chinese Optics
基金
2020年度广西中青年教师科研基础能力提升项目(No.2020KY39006)
2018年度广西科技计划重点研发项目(No.AB1850039)
广西工业职业技术学院2019年院级教科研项目。
关键词
液体折射率
最小偏向角法
恒温空心三棱镜
不确定度
refractive index of liquid
methhod of minimum deviation angle
thermostatic hollow prism
uncertainty
