激光与光电子学进展, 2011, 48 (9): 092501, 网络出版: 2011-07-01
紫外激光无损检测潜在指印技术研究
Noninvasive Detection of Latent Fingerprints Using Ultraviolet Laser
光谱学 紫外激光 指纹识别 照相系统 固有荧光 变像管 滤光片 spectroscopy ultraviolet laser fingerprint identification photography system intrinsic fluorescence image converter tube filter
摘要
潜在指印的显现是物证检验技术中的关键问题之一，而紫外(UV)照相技术是显现潜在指印等隐性痕迹物证的重要技术手段。采用266 nm紫外固体激光器为激发光源，利用人体指印固有物质成分对紫外光具有特殊的吸收、反射、散射及荧光特性，减弱或消除指印背景上的图案和其他细节干扰，增加指印纹线与背景的亮度反差，显出或增强潜在指印。通过紫外反射照相及紫外固有荧光照相技术，分别实现了对彩色杂志纸张、玻璃、电话背面、木纹桌面油漆面4种非渗透性物证检材及牛皮纸信封、便签纸2种渗透性物证检材表面遗留的新鲜及陈旧潜在指印的无损检测显现，并具有鉴定价值。
Abstract
Detection of latent fingerprints is one of the key problems in the forensic science area, and ultraviolet (UV) photography technology is an important method of latent fingerprints noninvasive detection. The 266 nm UV solid state laser is used as the excitation light source. According to the special absorption, reflection, scattering and fluorescence characteristics of fingerprint ridge residuals to UV light, and by using reflection photography and fluorescence photography technologies, fresh and old latent fingerprints on the surface of four types of non-absorbent objects (magazine cover, glass, back of cellular phone, wood desktop paintwork), and two types of absorbing objects (manila envelope and notebook paper) are noninvasively detected and revealed. The results have identification value.
李红霞, 钮洁青, 黄云刚, 毛林杰, 陈敬蓉. 紫外激光无损检测潜在指印技术研究[J]. 激光与光电子学进展, 2011, 48(9): 092501. Li Hongxia, Niu Jieqing, Huang Yungang, Mao Linjie, Chen Jingrong. Noninvasive Detection of Latent Fingerprints Using Ultraviolet Laser[J]. Laser & Optoelectronics Progress, 2011, 48(9): 092501.
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