太赫兹时域光谱测量液体光学常数的不确定度分析

发布时间：2017-12-28 10:56

本文关键词：太赫兹时域光谱测量液体光学常数的不确定度分析　出处：《中国测试》2017年05期 　论文类型：期刊论文

【摘要】：为建立太赫兹时域光谱测量液体样品光学常数的不确定度分析模型,针对以比色皿为样品池的太赫兹透射式测量系统,推导其测量方程。确认太赫兹幅值测量、样品厚度、比色皿厚度、比色皿倾角及近似传递函数等误差来源,以及这些误差在测量过程中的传递模型,得到表示它们各自不确定度与合成不确定度关系的解析公式。实验测量邻苯二甲酸二辛酯(DEHP)的折射率和吸收系数,并计算它们各自的测量不确定度的量级分别为0.01和1 cm-1,结果表明该不确定度评定模型可以成为评估光学常数测量结果准确性的基础。
[Abstract]:In order to establish the uncertainty analysis model for measuring the optical constants of liquid samples in terahertz time-domain spectroscopy, the measurement equation is deduced for terahertz transmission measurement system based on colorimetric dishes. The error sources of terahertz amplitude measurement, sample thickness, colorimeter thickness, dish tilt and approximate transfer function are confirmed, and the transfer models of these errors in the measurement process are obtained, and the analytical formulas for their relationship between uncertainty and synthetic uncertainty are obtained. The refractive index and absorption coefficient of two octyl formic acid two octyl ester (DEHP) were measured, and the order of measurement uncertainty was 0.01 and 1 cm-1 respectively. The results show that the uncertainty evaluation model can be used to evaluate the accuracy of optical constant measurement results.
【作者单位】：贵阳职业技术学院生化工程系;贵州省计量测试院;
【基金】：贵州省科学基金(J20142107) 贵阳职业技术学院科研项目(GYZGY2016YB-36)
【分类号】：O433.1
【正文快照】： ll0样品M2 M3M4发射天线太赫兹波M1Ec无样品Esam有样品探测天线图1透射式太赫兹时域光谱系统的太赫兹传播路径图[16]0引言太赫兹时域光谱技术(THz-TDS)是物质识别的重要工具[1]。到目前为止,利用太赫兹时域光谱技术的物质识别和成分分析的报道井喷式地增加,如爆炸物[2]、半导

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