红外热辐射技术显现潜指印的方法及装置研究
Research on Method and Device for Displaying Latent Fingermark by Infrared Thermal Radiation Technology

本文研究红外热辐射技术、激光诱导荧光技术显现潜指印的方法，并研制了相关装置，包含智能化控制的红外辐射装置、激光诱导装置和成像装置，为现场潜在汗液指印的显现提供新的技术支撑。利用自主研发的“红外热辐射技术显现潜指印的专门装置”，结合激光诱导荧光的方法，对A4打印纸、出租车票、餐巾纸、牛皮纸、POS打印单、人民币及报纸等渗透性客体表面的潜在汗液指印进行显现实验，实验结果在普通A4打印纸上检出率达95%；在出租车票、POS打印单上检出率为80%；在报纸、牛皮纸、餐巾纸上检出率为60%；在人民币上检出率为40%。为渗透性客体表面的潜在汗液指印的显现实践提供了参考。
In this paper, infrared thermal radiation technology and laser-induced fluorescence technology are studied to display latent fingermarks, and relevant devices are developed, including intelligent control infrared radiation device, laser induction device and imaging device, to provide new technical support for the display of latent sweat fingermarks in the field. The self-developed “special device for displaying latent fingerprints with infrared thermal radiation technology” was used. Combined with laser induced fluorescence method, the latent sweat fingerprints on the surface of permeable objects such as A4 paper, taxi ticket, napkin, kraft paper, POS print sheet, RMB and newspaper were tested, and the detection rate on ordinary A4 paper was 95%. The detection rate of taxi tickets and POS printing forms is 80%. The detection rate was 60% on newspaper, kraft paper and napkin. The detection rate on RMB was 40%. It provides reference for the development of latent sweat fingerprints on the surface of permeable objects.