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复杂的减弱总反射校正在几秒钟内,用于45°的非极化事件光

Thomas G Mayerhöfer^1,2, William D P Costa³, Jürgen Popp^1,2

¹Department of Spectroscopy/Imaging, Leibniz Institute of Photonic Technology (IPHT), Jena, Germany.

Applied spectroscopy

|January 23, 2024

概括

这项研究引入了一种更快的方法来纠正中红外线 (MIR) 减弱总反射 (ATR) 频谱. 通过分析带有和没有偏振的光谱,研究人员可以快速确定复杂的折射率,提高光谱精度.

科学领域:

频谱学是一种光谱学.
物理化学物理化学
材料科学材料科学材料科学

背景情况:

标准的中红外 (MIR) 减弱总反射 (ATR) 配件在45°的发射率上缺乏偏振器,限制了光谱校正的准确性.
强烈的MIR峰值容易受到异常分散的折射率变化的影响,使ATR校正复杂化.
现有的ATR校正方法可能是计算密集且耗时的.

研究的目的:

开发一种快速而准确的方法来对MIR光谱进行ATR校正.
从ATR测量中确定复杂的折射率函数.
为了提高ATR光谱分析的复杂性.

主要方法:

使用45°的ATR频谱,在没有偏振器的情况下记录,偏振角度来自相同的富里埃变换红外光谱 (FTIR) 系统.
应用改进的非代克莱默斯-克罗尼格分析来推导复杂的折射率.
模拟潜在的错误源,如冲击角度的扩散和极化角度的分散.

主要成果:

综合的光谱和偏振数据提供了足够的信息来确定ATR的s-偏振光谱.
非代的克莱默斯-克罗尼格分析很快 (在几秒钟内) 产生复杂的折射率函数.
该方法已成功地应用于水和八十甘,使用各种ATR晶体和配件.

结论:

开发的形式主义提供了一种显著更快的 (两次数量级) 替代ATR校正的代方法.
这种先进的ATR校正方法提高了MIR光谱分析的准确性,特别是对于具有强峰的样本.
该研究验证了该方法的有效性,并调查了潜在的错误来源,以获得更广泛的适用性.

关键词:

在 ATR 调整的纠正.在ATR-IR中使用ATR-IR.内部反射是一种内在反射.马卢斯的法律是法律.减弱的总反射红外线.

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