基于分块压缩感知理论的太赫兹波宽光束成像技术  

Terahertz Wave Wide-Beam Imaging Technology Based on Block Compressive Sensing Theory

作　　者：王与烨[1,2,3] 任宇琛 陈霖宇 李长昭 张超 徐德刚 姚建铨[1,2] Wang Yuye;Ren Yuchen;Chen Linyu;Li Changzhao;Zhang Chao;Xu Degang;Yao Jianquan(Institute of Laser and Optoelectronics, School of Precision Instruments and. Optoelectronics Engineering,Tianjin University, Tianjin 300072, China;Key Laboratory of Optoelectronics Information Technology, Ministry of Education , Tianjiji University,Tianjin 300072, China;De pa rtment of Neurosurgery, the First Hospital Affiliated to Arm y Medical University, Chongqing 400038, China)

机构地区：[1]天津大学精密仪器与光电子工程学院激光与光电子研究所,天津300072 [2]天津大学光电信息技术教育部重点实验室,天津300072 [3]陆军军医大学第一附属医院神经外科,重庆400038

出　　处：《光学学报》2019年第4期100-106,共7页Acta Optica Sinica

基　　金：国家973计划(2015CB755403);国家重点研发专项(2016YFC0101001);国家自然科学基金(61775160;61771332;61471257);中国博士后科学基金(2016M602954);重庆市博士后科研项目(Xm2016021)

摘　　要：提出了一种基于分块压缩感知理论的太赫兹波宽光束成像技术。模拟结果显示,该技术可以实现高分辨率、高质量的快速成像。采用连续太赫兹波CO_2气体激光器光源,基于宽光束矩阵调制采样,对不同物体进行了分块压缩感知成像,并与基于单像素随机采样的分块压缩感知方法进行了对比。结果表明,所提技术具有更高的成像稳定性,且其采样过程对不同成像物体的普适性更好。A terahertz wave wide-beam imaging technology based on the block compressive sensing theory is proposed. Simulation results show that this technology can be used to achieve the rapid imaging with high resolution and high quality. With the CO2 gas laser light source of continuous terahertz wave and based on the wide-beam matrix modulation sampling, the different objects are imaged by block compressive sensing. The results are compared with that by the block compressive sensing method based on single-pixel random sampling. It is shown that the proposed technology has a higher imaging stability. Moreover, the sampling process is more universal for different imaging objects.

关 键 词：成像系统 太赫兹成像 分块压缩感知 矩阵调制 采样技术 

分 类 号：TN29[电子电信—物理电子学]