基于微透镜阵列的多通道光寻址电位传感器研究  

Multi-Channel Light Addressable Potentiometric Sensor Based on Microlens Array

作　　者：蔡华[1] 徐莹[1] 刘清君[1] 李燕[1] 王丽江[1] 王平[1] 杨国光[2] 

机构地区：[1]浙江大学生物传感器国家专业实验室生物医学工程教育部重点实验室生物医学工程与仪器科学学院,杭州310027 [2]浙江大学光学工程系

出　　处：《传感技术学报》2007年第1期58-63,共6页Chinese Journal of Sensors and Actuators

基　　金：国家自然科学基金资助(30627002;30570492)

摘　　要：为了提高化学和生物图像传感器的成像速度和简化成像系统,提出了一种基于微透镜阵列的多通道光寻址电位传感器.利用微透镜阵列把单束激光转化成点阵,通过多频率斩波器,得到不同频率的光点阵列用作光寻址电位传感器的光源,从而实现多点同时检测.实验结果表明该系统具有良好的频域分辨率,通过数字补偿技术可获得各个检测点的电流电压特性曲线,证明可实现多点同时检测.该系统可以用于光寻址电位传感器和扫描光感阻抗传感器的快速成像,以及多通道化学生物图像检测.For improving the imaging velocity and simplifying the system of chemical imaging sensors, a novel design of multi-channel light addressable potentiometric sensor based on microlens array was proposed. With microlens array, the single laser was separated into a line-array focused laser. Every focused laser was modulated separately to a different settled frequency by an optical chopper. The surface potential at all illuminated regions could be measured simultaneously by analyzing the resulting photocurrent. The results indicate that this system has excellent frequency resolution, and the Ⅳ characteristics can be easily obtained by digital compensation. This system can be used to light addressable potentiometric sensor and scanning photo-induced impedance microscopy, and allows for fast imaging by line-scanning. And with different sensing materials, this device can be used to detect several components of sample in parallel.

关 键 词：光寻址电位传感器 微透镜阵列 多通道传感器 

分 类 号：TP212.3[自动化与计算机技术—检测技术与自动化装置]