表面等离子体共振传感器自适应测量光路  

Adaptive Optical Design in Surface Plasmon Resonance Sensor

作　　者：张峰[1] 钟金钢[1] 

机构地区：[1]暨南大学光电工程研究所,广东广州510632

出　　处：《光电子．激光》2006年第2期211-214,共4页Journal of Optoelectronics·Laser

基　　金：广东省自然科学基金资助项目(5006063)

摘　　要：提出了一种用于表面等离了体共振(SPR)传感器的双棱镜自适应光路设计。采用2个完全相同的等腰直角三棱镜,1个作为KRETSCHMANN棱镜结构传感器的元件,另1个作为光路的调整元件。当入射光固定,对双棱镜结构进行角度扫描时,出射光与入射光始终平行,只随着出射点的改变发生小的平移,利用凸透镜进行会聚,可以实现扫描过程中光探测器的固定不动。它避免了传统角扫描SPR传感器需要Θ/2Θ转角仪来对棱镜和光探测器分别进行Θ和2Θ角旋转的复杂结构,减少了运动部件,使仪器装置结构简单、紧凑、操作简便。A double-prism adaptive optical design in surface plasmon resonance（SPR） sensor is proposed which consists of two identical isosceles-right triangular prisms. One is used as a component of Kretschmann configuration ; The other is to regularize the optical path. When double-prism structure is having an angular scanning with immovable incident ray,the output ray is always kept parallel with the incident ray,and it just has a small displacement with the shift of output point. And the output ray can be focalized on a photodetector by a convex lens,so that a photodetector can be fixed in this process. Complicated structure of θ/2θ rotating stage with which a prism and a photodetector rotates at θ and 2θ respectively in traditional angular scanning SPR sensor is avoided,so new design reduces movable components, makes structure simple, compact, and makes control convenient.

关 键 词：表面等离子体共振(SPR) 衰减全反射(ATR) 角扫描 自适应光路 

分 类 号：TN247[电子电信—物理电子学]