光子学报, 2015, 44 (7): 0730002, 网络出版: 2015-08-25   

多角度红外差分吸收光谱的化学污染物在线检测方法

Research on in situ Detection of Chemical Contaminants Based on Multi-angle Infrared Differential Absorption Spectra
作者单位
1 中国科学院大学, 北京, 100049
2 中国科学院安徽光学精密机械研究所, 合肥 230031
摘要
基于多角度红外差分吸收光谱, 提出一种针对物体表面化学污染物在线检测法.用红外遥测光谱仪和光源, 以不同角度对化学污染物进行检测, 根据不同角度吸收率的差别, 通过差分法提取化学污染物的光谱特征.在分析多角度红外差分吸收光谱的化学污染物在线检测模型的基础上, 分别在室内和野外对不同基底上的三种化学污染物: 二甲基硅油, 磷酸三乙酯和水杨酸甲酯进行检测.结果表明, 借助于多角度红外吸收光谱, 该方法在室内和野外都能准确提取典型基底上三种物质的光谱特征, 且基底越平整, 光源入射角的角度差别越大, 特征越明显.
Abstract
In order to detect contaminants on surface, a method for surface contamination detection was developed based on multi-angle infrared differential absorption spectra. As contaminants′ absorption ability varied with measurement angles, the spectral features of contaminants could be extracted from multi-angle observations. Firstly, multi-angle measurement model of chemical contaminants was introduced. Then three typical compounds: poly (dimethylsiloxane), triethyl phosphate and methyl salicylate were measured both in laboratory and field on different substrates. The results showed that, with multi-angle infrared differential absorption spectra, this method could extract directly spectral features of contaminants both in laboratory and field on typical surfaces, and spectral features of contaminants got more distinct with more smooth substrate and larger difference between two incidence angles employed. This method had application potential in immediate responding for chemical contaminants detection.

刘家祥, 方勇华, 崔方晓, 吴军. 多角度红外差分吸收光谱的化学污染物在线检测方法[J]. 光子学报, 2015, 44(7): 0730002. LIU Jia-xiang, FANG Yong-hua, CUI Fang-xiao, WU Jun. Research on in situ Detection of Chemical Contaminants Based on Multi-angle Infrared Differential Absorption Spectra[J]. ACTA PHOTONICA SINICA, 2015, 44(7): 0730002.

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