高分辨率太赫兹主动关联成像技术研究

项目名称： 高分辨率太赫兹主动关联成像技术研究

项目编号： No.61501435

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 赵成强

作者单位： 中国科学院上海光学精密机械研究所

项目金额： 21万元

中文摘要： 太赫兹波具有非常多的优良特性，使其在安全、医学、工业等多个领域具有非常好的应用前景。因现有器件的限制，常规的太赫兹成像手段很难获得高分辨率的图像。本项目将主动关联成像技术引入到太赫兹成像领域，提出一种具有高分辨率特点的单像素探测器太赫兹成像技术，并对其特性展开深入的理论和实验研究。具体研究思路为：分析太赫兹目标的波束传输特点，建立太赫兹尺度下的主动关联成像模型，并据此优化所采用的关联算法和压缩感知算法。研究高分辨测量矩阵的产生机制和方法，并建立一套可进行高分辨率成像的太赫兹主动关联成像实验装置。在此基础上探索太赫兹关联成像的图像质量与其他各参量之间的对应关系。通过本项目的实施，能够在现有条件下利用单像素探测器实现太赫兹高分辨成像，从而拓展太赫兹的应用范围。

中文关键词： 太赫兹成像；关联成像；压缩感知

英文摘要： Terahertz waves have a lot of excellent features, so that it is applied in security, medical, industrial and other fields with very good prospects. Restricted by the existing devices, It is hard to achieve high-resolution image by conventional method. In this project, we introduces active correlated imaging technology into the field of terahertz imaging, and proposes a new terahertz imaging method with single pixel detector, which has high resolution feature. We will have a depth theoretical and experimental research on its characters. First of all, the transmission characteristics of the terahertz beam are analyzed, and the active correlated imaging mode on terahertz scales is established. Based on the above research, the correlation algorithm and the compressed sensing algorithm are optimized. After that, mechanisms and methods to produce high-resolution measurement matrix are analyzed and evaluated, based on which an active terahertz correlated imaging system is set up to research the correspondence between the image quality and other various parameters. Implement of this project will achieve high-resolution terahertz imaging by a single pixel detector under the existing conditions, and thereby expand the terahertz applied range.

英文关键词： terahertz imaging;Correlated imaging;Compressive sensing