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：刘家祥[1,2] 方勇华[1,2] 崔方晓[1] 吴军[2] 

机构地区：[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

出　　处：《光子学报》2015年第7期73-80,共8页Acta Photonica Sinica

基　　金：国家自然科学基金(No.40171232)资助

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.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.

关 键 词：红外光谱学与光谱仪 辐射检测 多角度红外差分吸收光谱 表面化学污染物 红外光谱 

分 类 号：TN219[电子电信—物理电子学]