Vectorial Digitelligent Optics for High-Resolution Non-Line-of-Sight Imaging  

作　　者：Yinghui Guo Yunsong Lei Mingbo Pu Fei Zhang Qi Zhang Xiaoyin Li Runzhe Zhang Zhibin Zhao Rui Zhou Yulong Fan Xiangang Luo 

机构地区：[1]National Key Laboratory of Optical Field Manipulation Science and Technology,Institute of Optics and Electronics,Chinese Academy of Sciences,Chengdu 610209,China [2]State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering,Institute of Optics and Electronics,Chinese Academy of Sciences,Chengdu 610209,China [3]Research Center on Vector Optical Fields,Institute of Optics and Electronics,Chinese Academy of Sciences,Chengdu 610209,China [4]College of Materials Science and Opto-Electronic Technology,University of Chinese Academy of Sciences,Beijing 100049,China [5]Tianfu Xinglong Lake Laboratory,Chengdu 610299,China

出　　处：《Engineering》2025年第2期70-78,共9页工程(英文)

基　　金：supported by the National Key Research and Development Program of China(2023YFB2805800 and 2021YFA1401003);the National Natural Science Foundation of China(62222513).

摘　　要：Object imaging beyond the direct line of sight is significant for applications in robotic vision,remote sensing,autonomous driving,and many other areas.Reconstruction of a non-line-of-sight(NLOS)screen is a complex inverse problem that comes with ultrafast time-resolved imager requirements and substantial computational demands to extract information from the multi-bounce scattered light.Consequently,the echo signal always suffers from serious deterioration in both intensity and shape,leading to limited resolution and image contrast.Here,we propose a concept of vectorial digitelligent optics for high-resolution NLOS imaging to cancel the wall’s scattering and refocus the light onto hidden targets for enhanced echo.In this approach,the polarization and wavefront of the laser spot are intelligently optimized via a feedback algorithm to form a near-perfect focusing pattern through a random scattering wall.By raster scanning the focusing spot across the object’s surface within the optical-memory-effect range of the wall,we obtain nearly diffraction-limited NLOS imaging with an enhanced signal-to-noise ratio.Our experimental results demonstrate a resolution of 0.40 mm at a distance of 0.35 m,reaching the diffraction limit of the system.Furthermore,we demonstrate that the proposed method is feasible for various complex NLOS scenarios.Our methods may open an avenue for active imaging,communication,and laser wireless power transfer.

关 键 词：Non-line-of-sight imaging Vectorial digitelligent optics Spatial light modulator Digital optics Wavefront shaping Metasurface 

分 类 号：O436[机械工程—光学工程]