利用短波紫外激发长波紫外荧光显现深色背景客体上的血指印  

Ultraviolet Fluorescence of Long-wave Ultraviolet to Develop Blood Fingerprints on Objects with Dark Background

作　　者：肖露 代雪晶[1] XIAO Lu;DAI Xuejing(Criminal Investigation Police University of China,Shenyang 110000,China)

机构地区：[1]中国刑事警察学院

出　　处：《中国司法鉴定》2019年第3期51-54,共4页Chinese Journal of Forensic Sciences

基　　金：中国刑事警察学院2018年度研究生创新能力提升项目(2018YCYB44)

摘　　要：目的许多复杂客体上的血潜指纹通常无法由简单的拍照提取方法获取。为了有效并且无损的显现提取到现场血潜指印,运用短波紫外激发长波紫外荧光的方法,对客体上的血潜指纹进行拍摄。方法收集了四种生活中常见的、具有复杂且深色背景的客体。实验中使用红紫外照相机结合短波环形紫外灯系统,在常温的环境下,运用该设备的短波紫外激发长波紫外荧光技术显现血指纹,并且将其提取指纹效果与通过普通配光方法和紫外反射摄影方法所拍摄的指纹图片效果进行对比。结果对上述方法所得到的图片效果进行比较后,短波紫外激发长波紫外方法能够更加有效的提取深色复杂背景客体上的血指纹。结论该方法成像图像清晰,反差明显、操作简单,也能够有效的显现微弱的血潜指纹。Objective The blood latent fingerprints on many complex objects are usually not available by simple photo extraction methods.In order to effectively and non-destructively extract blood latent fingerprints from the scene,short-wave ultraviolet excitation long-wave ultraviolet fluorescence was used to capture the blood latent fingerprint on the object.Method Four objects common in life and with complex backgrounds were collected.A red-UV camera was used in the experiment in combination with a short wave annular UV lamp system.In an environment at the room temperature,the short-wave ultraviolet excitation long-wave ultraviolet fluorescence technique of the device was used to collect the blood fingerprints.Then its fingerprint extraction effect was compared with the fingerprint image taken by the ordinary light distribution method and the ultraviolet reflection photography method.Results After comparing the image effects of the methods above,the short-wave ultraviolet-excited long-wave ultraviolet method extracted the blood fingerprints on the dark complex background objects more effectively.Conclusion This method has clear imaging,obvious contrast,simple operation,and the weak blood latent fingerprint can be effectively displayed.

关 键 词：红紫外相机 血指印 紫外反射 短波紫外激发长波紫外荧光 

分 类 号：DF794.1[政治法律—诉讼法学]