被动太赫兹成像二维扫描技术  

2-D scanning technology in passive terahertz imaging

作　　者：谢巍[1] 侯丽伟[1] 潘鸣[1] 

机构地区：[1]中国电子科技集团公司第50研究所,上海200331

出　　处：《太赫兹科学与电子信息学报》2014年第2期176-179,共4页Journal of Terahertz Science and Electronic Information Technology

基　　金：国家高技术研究发展计划(863)资助项目

摘　　要：太赫兹成像受探测器像元数少和无法进行大规模面阵集成的限制,大视场成像不可避免地要用到二维扫描。45°镜具有尺寸小,稳定性好,幅宽大等特点,可以用来实现被动太赫兹二维扫描成像。详细分析了45°镜扫描成像的工作原理和扫描方式,提出了绕Z轴摆动实现水平扫描,绕Y轴摆动实现垂直步进的扫描方案,计算了扫描轨迹,边沿视场成像畸变约3.2%,并通过成像实验对扫描方案进行了验证,得到了大视场下的被动太赫兹二维扫描图像。It is inevitable to use 2-D scanning in wide-Field of View(FOV) terahertz imaging due to the restriction of terahertz detector(lack of pixels and hardly integrated to large-scale plane array). The 45° mirror could be used in passive terahertz 2-D scanning imaging for its advantages in dimension, stability and scanning Field of View. The principle of 2-D scanning imaging using 45° mirror is analyzed in detail. A new method with horizontal scanning by rotating around axis Zand vertical stepping by rotating around axis Yis proposed. The scanning trace is calculated, the margin FOV distortion is about 3.2%. The method is validated by the imaging experiment and image is acquired in wide-Field of View.

关 键 词：被动太赫兹成像 二维扫描 45°镜 畸变 

分 类 号：TN219[电子电信—物理电子学]