光声光谱在法庭科学生物物证分析方面的研究进展  

Biological Evidence Analysis: a Research Progress of Photoacoustic Spectroscopy in Forensic Science

作　　者：李佳瑞 王继芬[1] Li Jiarui;Wang Jifen(School of Investigation,People's Public Security University of China,Beijing 100038,China)

机构地区：[1]中国人民公安大学侦查学院,北京100038

出　　处：《激光与光电子学进展》2021年第24期51-60,共10页Laser & Optoelectronics Progress

摘　　要：生物物证具有个体特异性,易被犯罪分子忽视,且稳定附着在犯罪现场,难以彻底毁灭,具有很高的侦查利用价值。光声光谱技术以光声效应为基础,利用样品吸收光能转换成热能并产生声信号的机制进行检测,为生物检材的研究提供了一种灵敏而又对检材无损的有效方法,成为法庭科学领域常用的分析工具。本文在简要介绍光声效应及光声信号产生原理的基础上,重点讨论了光声光谱技术在鉴定分析可以作为法庭科学生物物证的气体、液体、生物组织等检材方面的研究现状,并对其应用过程中的局限性及发展前景进行了总结和展望。Biological evidence is individual-specific, easily ignored by criminals, stably attached to the crime scene, and difficult to destroy completely. It has a high investigative value. Based on the photoacoustic effect, the photoacoustic spectroscopy realize detection using the mechanism by which the sample absorbs light energy, converts it into heat energy, and generates a sound signal. The photoacoustic spectroscopy provides a sensitive and nondestructive effective method for the research of biological materials, and it has become an essential analysis tool in the field of forensic science. Based on a brief introduction to the photoacoustic effect and the principle of photoacoustic signal generation, this article focuses on the research status of photoacoustic spectroscopy in the identification and analysis of gas, liquid, and biological tissue materials that can be used as forensic biological evidence. The application limitations and development prospects of the technology are summarized and prospected.

关 键 词：光谱学 光声光谱 法庭科学 生物物证分析 

分 类 号：O436[机械工程—光学工程]