基于碳纳米管薄膜的偏振成像实验研究  

Experimental study of polarization imaging based on carbon nanotube films

作　　者：王怡彬 张辉[1,2,3] 张鹏 赵旸[1,2,3] WANG Yibin;ZHANG Hui;ZHANG Peng;ZHAO Yang(CAS Key Laboratory of Mechanical Behavior and Design of Materials,Hefei 230026,Anhui,China;Department of Precision Machinery&Precision Instrumentation,University of Science and Technology of China,Hefei 230026,Anhui,China;Key Laboratory of Precision Scientific Instrumentation of Anhui Higher Education Institutes,University of Science and Technology of China,Hefei 230026,Anhui,China)

机构地区：[1]中国科学院材料力学行为和设计重点实验室,安徽合肥230026 [2]中国科学技术大学精密机械与精密仪器系,安徽合肥230026 [3]中国科学技术大学精密科学仪器安徽普通高校重点实验室,安徽合肥230026

出　　处：《实验力学》2022年第4期447-454,共8页Journal of Experimental Mechanics

基　　金：国家自然科学基金(11772321,51732006)资助。

摘　　要：碳纳米管由于其特殊的一维中空管状结构,因此具有强烈的光学各向异性。顺排碳纳米管薄膜由平行生长的碳纳米管排列组成,通过化学气相沉积法制备得到。本文通过偏振性能测试实验证明了薄膜在可见、红外多个波长具有较高的偏振度;将薄膜作为偏振材料应用在可见光和红外光的分时偏振成像实验中,基于斯托克斯矢量的偏振描述方法得到了偏振度图像。与直接获得的光强度图像相比,利用碳纳米管薄膜得到的偏振度图像对材料或粗糙度不同的表面具有更强的区分和增强效果,表明碳纳米管薄膜作为宽光谱的偏振材料,可以很好地应用于偏振成像领域。本文还针对薄膜偏振度的误差进行了测量矫正,进一步提高了薄膜偏振成像的增强效果。Carbon nanotubes(CNTs)possess apparent anisotropy for light propagation due to their unique one-dimensional characteristic.Moreover,the super-aligned CNT film can be easily synthesized by chemical vapor deposition(CVD),a relatively low-cost method.It can be verified by polarization performance test,the excellent polarimetric capacities of super-aligned CNT film in a broad range from visible to infrared.Furthermore,following the Stokes theory,the images describing the degree of linear polarization(DOLP)were captured in visible and infrared wavelength range,respectively.The DOLP images obtained with CNT film exhibit typical capacities in distinguishing the objective differences,such as the divergences in material,roughness,structure,etc.The correction of the non-uniformity through calibration further enhanced the image quality greatly.This work demonstrated the great potential of the applications of CNT film in polarimetric regions.

关 键 词：偏振片 偏振成像 碳纳米管薄膜 光学各向异性 

分 类 号：O436.3[机械工程—光学工程]