摘要
目的介绍一种利用特殊的红外热成像技术显现常见纸张上汗潜手印的新方法。方法利用英国Foster+Freeman公司生产的TFD-2纸张手印快速显现系统,通过特殊的红外热成像技术,使汗潜手印呈现强烈荧光,从而显现手印。结果红外热成像方法处理后,汗潜手印在特种激发光(带宽为450nm～510nm)激发下显出较强的橙色荧光;持续处理后,汗潜手印在自然光下呈棕褐色,并在短波紫外光源(254nm)激发下也可显出清晰连贯的手印纹线;而且,新鲜和陈旧手印均有较好的显现效果。结论 TFD-2纸张手印快速显现系统显现纸张上汗潜手印的方法,具有操作简单、快速安全、无需化学试剂、显现效果明显的特点,适合推广使用。
Objective To introduce a new method for developing latent fingerprints on paper. Methods The fingerprints were treated by special infrared thermal mapping technique and developed with Thermal Fingerprint Developer designed by Foster Freeman Ltd. Results The latent fingerprints exhibited photoluminescence under light of 450 nm -510 nm by heating a short time. After heating longer time, the fingerprints became dark brown under the natural light. Under the light of 254 nm, both fresh and aged fingerprints could be developed. Conclusion This method has great potential as a safe, simple, low-cost, chemical-free method for fingerprints detection.
出处
《刑事技术》
2012年第4期19-22,共4页
Forensic Science and Technology
