应用最小偏向角法的液体折射率精密测试

孙一书; 陈怡; 韩冰; 袁理

doi:10.3788/CO.20191204.0826

应用最小偏向角法的液体折射率精密测试

doi: 10.3788/CO.20191204.0826

孙一书^1,,
陈怡^1, ,,
韩冰²,
袁理²

1.
吉林大学原子与分子物理研究所, 吉林长春 130012
2.
中国科学院长春光学精密机械与物理研究所质检中心, 吉林长春 130033

基金项目:

国家自然科学基金项目 61675198

吉林省科技发展计划项目 20180201061SF

详细信息

作者简介:
孙一书(1990-), 男, 吉林长春人, 硕士研究生, 主要从事光学测量方面的研究。E-mail:sunyishu@yeah.net

陈怡(1977-), 女, 吉林长春人, 博士, 副教授, 2009年于韩国仁荷大学获得博士学位, 主要从事光和物质相互作用方面的研究。E-mail:yichen@jlu.edu.cn

中图分类号: O431;O435
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出版历程
- 收稿日期: 2018-12-12
- 修回日期: 2019-01-18
- 刊出日期: 2019-08-01

Precision test technology of liquid refractive index using the method of minimum deviation angle

SUN Yi-shu^1
,,
CHEN Yi^{1
, ,},
HAN Bing²,
YUAN Li²

1.
Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China
2.
Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Quality Inspection Center, Changchun 130033, China

Funds:

National Natural Science Foundation of China 61675198

Jilin Province Science and Technology Development Plan Project 20180201061SF

More Information

Corresponding author: CHEN Yi, E-mail:yichen@jlu.edu.cn

摘要

摘要: 本文提出了一种自研盛装器皿以提高液体折射率的测试精度。该器皿由金属框架与等厚玻璃窗口组成，其制造工艺相对简单，减少了透射反射面面型精度及窗口等光程因素带来的系统误差，提高了测试精度。本文采用的测试方法为最小偏向角法。最小偏向角法主要用于固体折射率的测试，较少应用于液体折射率的测试。主要因为需要制作特殊的盛装器皿，制造工艺难度大，难以控制面型精度及透射窗口的等光程，对测试结果造成较大影响。经过理论分析可知，采用本文设计的盛装器皿可以满足10^-6数量级的液体折射率测试需求。采用0.2″高精度转台进行实验，耦合器皿带来的系统误差和测试系统的理论测量精度达10^-6数量级。对某离子液在546.08 nm特征谱线下实际测量的标准差为1.42×10^-6。自研器皿满足液体折射率的精密测试需求。
- 液体折射率 /
- 最小偏向角法 /
- 误差分析
Abstract: A self-developed container made up of a metal frame and a glass window of equal thickness is proposed to improve the test accuracy of liquid refractive index. It improves test accuracy as the manufacturing process is relatively simple, which reduces the systematic error that arises due to the transflective surface and the equal optical path of the glass window. The test method in this paper uses the minimum deviation angle method, which is mainly used for testing solid refractive index but is less frequently applied to test liquid refractive index. Because a special container is needed, the manufacturing process is more complex, and the equal optical path length of transmission glass windows are difficult to control, which will greatly affect the test results. Using the container designed in this paper, theoretical test accuracy of liquid refractive index can reach the order of magnitudes 10^-6. In the experimental case of 0.2″ high-precision turntable, the systematic error brought by the coupled container and the theoretical measurement accuracy of the test system can satisfy the demands in the order of magnitudes 10^-6. The standard deviation of the actual measurement of an ionic liquid under the characteristic spectral line of 546.08 nm is 1.42×10^-6. The self-developing container meets the precise testing needs of the liquid refractive index.
- liquid refractive index /
- the method of minimum deviation angle /
- error analysis

HTML全文

图 1 最小偏向角法测折射率原理图

Figure 1. Schematic diagram of refractive index measurement by method of minimum deviation angle

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图 2 盛装器皿示意图

Figure 2. Schematic diagram of the vessel

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图 3 测量光路示意图

Figure 3. Schematic diagram of measuring optical path

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图 4 未盛装液体的样块

Figure 4. Sample without the liquid

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图 5 盛装液体的样块

Figure 5. Sample containing the liquid

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表 1 几种特定温度下空气折射率

Table 1. Air refractive indexes at several specific temperatures

T	15 ℃	18 ℃	20 ℃	22 ℃	25 ℃
n_r	1.000 277 1	1.000 274 3	1.000 272 4	1.000 271 5	1.000 267 8

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表 2 顶角A测试值

Table 2. Test value of head angle A

测试次数	1	2	3	4	5	标准差
顶角	60.007 20°	60.007 17°	60.007 21°	60.007 20°	60.007 20°	1.37e-5

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表 3 某离子液在Hg光谱灯546.08 nm特征谱线下的测试数据

Table 3. Test data of ionic liquid under the characteristic line of 546.08 nm of Hg spectrum lamp

测试次数	1	2	3	4	5	标准差
折射率值	1.366 802 2	1.366 799 1	1.366 801 5	1.366 801 5	1.366 798 7	1.42e-6

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