基于迈克尔逊干涉仪的SPR传感器的研究  

Research on the SPR Sensor Based on Michelson Interferometer

作　　者：刘纯龙[1] 王红理[1] 方湘怡[1] 程向明[1] 

机构地区：[1]西安交通大学理学院,西安710049

出　　处：《传感技术学报》2010年第5期635-638,共4页Chinese Journal of Sensors and Actuators

基　　金：陕西省自然科学基金资助(2006A06)

摘　　要：研究了一种基于迈克尔逊干涉仪干涉成像的新型表面等离子体共振(Surface Plasmon Resonance,SPR)传感器,介绍了系统的构建方法和工作原理。系统以溴钨灯为迈克尔逊干涉仪的光源产生干涉图像,采用Kreschmann棱镜耦合结构激励SPR,由CCD摄像机采集传感芯片干涉图,对干涉图进行信息提取和傅里叶变换得到光谱图,再对光谱图进行分析处理得到SPR曲线。在系统中引入了辅助定标光路,即以一已知波长的单色光(氦氖激光器)作为标尺确定光强随光程差变化的干涉图函数中采样点的选取,降低了使用迈克尔逊干涉仪过程中的转动和传动机械误差。实验结果表明,该传感系统具有成本低、结构简单、操作方便、多通道检测等优点。A novel surface plasmon resonance sensor based on interference imaging technique with a Michelson interferometer is proposed.The structure and principle of the system is presented.Interference images are produced by a Michelson interferometer,which used a bromine tungsten lamp as the light source.A Kretschmann prism configuration is used to stimulate SPR.The reflected biochip images are recorded by a CCD camera.Spectral images which are obtained through Fourier transform of the interference images,are analyzed and processed to get SPR curves.An assisted calibration optical path is introduced into the system and a monochromatic light（He-Ne laser）with known wavelength is employed as a scale to sample,which can reduce mechanical errors of transmission and rotation from Michelson interferometer.Experiments show that the system has the advantages of low cost,simple structure,easy operation and mutichannel detection.

关 键 词：表面等离子体共振传感器 傅里叶变换 迈克尔逊干涉仪 辅助定标光路 

分 类 号：TP212.3[自动化与计算机技术—检测技术与自动化装置]