显微近、 中红外成像不仅可以获得样品的光谱信息， 而且可以获得样品的空间分布信息， 这是传统的近、 中红外光谱分析所无法比拟的。 该文以外观非常相似的聚乙烯膜(材料Ⅰ)和封口膜(材料Ⅱ)为研究对象， 分别采集了样品的显微近、 中红外图像。 针对两种材料进行化学成像和相关光谱成像， 比较并讨论了每种材料的两种成像方法。 结果表明， 材料Ⅱ的显微近、 中红外化学成像中， 两种材料化学成像值相差分别为0.004 8和0.254 8； 材料Ⅰ的显微近、 中红外化学成像中， 两种材料化学成像值相差分别为0.002 6和0.326 5； 近、 中红外谱区的显微成像皆可得到两种材料清晰的成像， 从而可区分两种材料。 对两种材料相关光谱成像的研究表明， 分别以两种材料的近、 中红外光谱作为参比光谱的相关光谱成像可以明显地区分两种材料， 成像结果较清晰； 显微中红外相关光谱成像中， 两种材料的光谱和参比光谱的相关系数差异大于0.12， 成像结果更清晰； 而显微近红外相关光谱成像图可利用图像中两种材料光谱和参比光谱相关系数的细微差异区分两种材料。 该研究为农产品包装材料安全性的快速判别提供一定的参考， 并为显微近、 中红外成像分辨不同材料提供一定的成像方法参考。

The NIR/MIR micro-imaging can supply not only the information of spectra, but also the information of spacial distribution of the sample, which is superior to the traditional NIR/MIR spectroscopy analysis. In the present paper, polyethylene and parafilm, with similar appearances, were regarded as the research objects, of which the NIR/MIR micro-imaging was collected. Chemical imaging (CI) and compare correlation imaging were carried out for the two materials respectively to discuss the imaging methods of the two materials. The result indicated that the differentiation of the CI values of the two materials in the NIR/MIR CI for material Ⅱ was 0.004 8 and 0.254 8 respectively, while those in the NIR/MIR CI for material Ⅰ were 0.002 6 and 0.326 5, respectively. Clear CI was acquired, and the two materials could be differentiated. The result of the compare correlation imagings indicated that the compare correlation imagings, in which the NIR/MIR spectra of the two materials were regarded as reference spectra respectively, can differentiate the two materials remarkably with clear imagings. In the compare correlation imagings of MIR micro-imaging, the difference of the correlation coefficients between the two materials’ MIR spectra and the reference spectrum was more than 0.12, which showed a better imaging result; while a tiny difference of the correlation coefficients between the two materials’ NIR spectra and the reference spectrum could be employed to show a clear imaging result for NIR compare correlation imaging so as to differentiate the two materials. This thesis, to some extent, can supply the reference to not only the rapid discrimination of the safety of the packaging material for agri-food, but also the imaging methods for NIR/MIR micro-imaging to differentiate the different materials.