荧光成像技术是无损检测潜在指印的重要技术手段。针对纸张类检材表面遗留潜在指印，采用紫外激光器作为激发光源，检材热处理技术与荧光成像技术相结合。实验控制检材热处理温度与时间，增强遗留指印物质成分受激发射荧光强度，减弱或消除背景荧光干扰，提高指印纹线与背景的亮度反差。利用荧光成像技术，实现了常用书写纸表面遗留的潜在新鲜混合指印、汗迹指印及陈旧性指印的显现与提取，为热处理技术与荧光成像技术无损显现纸张潜指印的应用提供了实验依据。

Fluorescence imaging technique is an important technique for noninvasive detection of latent fingerprints. An ultraviolet (UV) laser is used as excitation light source, and the thermal treatment technique and the fluorescence imaging technique are combined to noninvasively detect and show the latent fingerprints on the surface of porous papers. By controlling the heating temperature and time in the thermal treatment period, the brightness contrast between fingerprints and background is increased, and the fresh and aged latent fingerprints on the paper surface are noninvasively detected and shown by using the fluorescence imaging technique. The study provides experimental guidance for the application of thermal treatment and fluorescence imaging techniques in the field of latent fingerprint detection.