应用SPRI技术检测指纹上的化学品残留

介绍了表面等离子体共振成像（ SPRI）的原理，应用自行搭建的SPRI系统采集指纹图像，并分析其中的化学物残留。在实验中，测量了粘有TiO2颗粒的指纹和正常状态下的指纹的SPR吸收光谱，并进行比较分析。实验结果表明：指纹图像有较高的分辨率和对比度；通过对指纹图像进行SPR分析，获得其SPR图谱，能显著观察到其共振波长的变化，从而能实现对残留化学品的检测。

Application of SPRI technology in detecting of chemical residual in fingerprint

The principles of surface plasmon resonance imaging( SPRI)are introduced,and a home-made SPRI system is utilized to acquire image of fingerprint and analyze chemical residual in fingerprint. In this study,a fingerprint containing TiO2 residual and a fingerprint in normal state are measured for comparison. Experimental results demonstrate that this SPRI technology improves resolution and contrast of the fingerprint image;by SPR analysis on fingerprint image,obtain its SPR spectrum,wavelength change can be observed obviously,so as to realize chemical residual detecting.