基于微球体超级透镜的亚波长分辨率数字全息方法研究

项目名称： 基于微球体超级透镜的亚波长分辨率数字全息方法研究

项目编号： No.61205010

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 信息四处

项目作者： 王云新

作者单位： 北京工业大学

项目金额： 27万元

中文摘要： 当前超分辨率数字全息成像的出发点大多是如何获取更多的远场高频分量，而没有考虑蕴含亚波长信息的近场倏逝波，因此无法突破衍射极限分辨率。本项目将数字全息方法与基于微球体超级透镜的超衍射极限成像相结合，从而使数字全息成像具有亚波长的横向分辨率和纳米级的轴向分辨率。针对微球体超级透镜近场光波传播理论的缺乏，本项目基于三维矢量衍射理论，将建立有效的近场光波，特别是近场倏逝波的衍射传播和成像模型，定量确定微球体性能参数对光波复振幅的影响；利用衍射传播过程的中间平面和直接积分快速计算方法，发展不受再现距离和CCD参数制约的高分辨率数值再现算法；基于现有的预放大数字全息系统，实现基于微球体超级透镜的亚波长分辨率成像功能，采用偏振复用方法降低散斑噪声，利用多角度照明模式采集更多的近场倏逝波，突破衍射极限，实现亚波长分辨率定量相衬成像。项目成果可应用于纳米技术和生命科学等领域，具有重要的学术意义和应用价值。

中文关键词： 数字全息；超分辨率；微球体超级透镜；相衬成像；

英文摘要： The basic idea of all the super-resolution digital holography is mostly to acquire more far-field high frequency informations presently, and the near-field evanescent wave is usually neglected, so the sub-wavelength resolution can not be achieved. In this project, the digital holographic technology is combined with super-resolution imaging based on the microsphere superlens, and the sub-wavelength transverse resolution and the nano-level vertical resolution can be obtained in the digital holographic system. Aiming to the absence of the near-field propagation theory for the microsphere superlens, the effective diffraction model of the near-field wave, especially the evanescent wave will be established by three-dimensional vector diffraction theory, and the quantitative function to the near-field wave should be acquired with the parameters of the microsphere superlens. Numerical reconstruction algorithm with high resolution is developed using the mid-plane in the diffraction propagation process and the direct integral fast method, which is not restricted by the recording distance and CCD parameters. Based on the existing pre-magnification digital holography system, the sub-wavelength imaging function can be achieved with the microsphere superlens. The polarization multiplexing method is utilized to reduce the spec

英文关键词： digital holography；superresolution；mMicrosphere superlens；phase-contrast imaging；