利用傅里叶红外图像系统,直接采集常见书写材料在打印纸上形成的交叉笔画处的红外光谱信息和空间结构信息。研究结果表明:样品红外谱图能够反映交叉笔画的形成顺序,同时还能够确定交叉笔画是同种或异种材料形成。此法能够为此类文件物证的鉴定提供科学依据。 Using the Fourier infrared image system, infrared spectrum information and spatial structure information of cross-strokes formed by common writing materials on printing paper are directly collected. The results show that the infrared spectrum of the sample can reflect the formation order of cross-strokes, and at the same time, it can be confirmed that the cross-strokes are made of the same or different materials. This method can provide scientific evidence for the identification of such documents.