Zhang Lingyun, Zhang Chi, Zhang Li, Yang Jianing, Bian Wei, You Rui, Jing Xiaoli, Xing Fei, You Zheng, Zhao Xiaoguang
State Key Laboratory of Intelligent Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.
Department of Precision Instrument, Tsinghua University, Beijing, 100084, China.
Light Sci Appl. 2025 Aug 25;14(1):287. doi: 10.1038/s41377-025-01999-4.
Light detection and ranging (LiDAR) is widely used for active three-dimensional (3D) perception. Beam scanning LiDAR provides high accuracy and long detection range with limited detection efficiency, while flash LiDAR can achieve high-efficiency detection through the snapshot approach at the expense of reduced accuracy and range. With the synergy of these distinct detection approaches, we develop a miniaturized dual-mode, reconfigurable beam forming device by cascading Pancharatnam-Berry phase and propagation phase metasurfaces, integrated with a micro-actuator. By modulating incident light polarization, we can switch the output beam of the device between the beam array scanning mode and flash illuminating mode. In the scanning mode, the device demonstrates a continuously tunable angular resolution and a ± 35° field of view (FoV) through driving the micro-actuator to achieve the lateral translation of ±100 μm. In the flash mode, uniform illumination across the entire FoV is achieved. As a proof of concept, we propose an adaptive 3D reconstruction scheme that leverages the device's capability to switch operation modes and adjust detection resolution. Together, the proposed device and the detection scheme constitute a dual-mode LiDAR system, demonstrating high adaptability to diverse environments and catalyze the applications of more efficient and compact 3D detection systems.
激光探测与测距（LiDAR）被广泛用于主动式三维（3D）感知。光束扫描LiDAR具有高精度和长探测范围，但探测效率有限，而闪光LiDAR可以通过快照方法实现高效探测，代价是精度和范围降低。通过将这些不同的探测方法协同作用，我们通过级联潘查拉特纳姆 - 贝里相位和传播相位超表面，并集成一个微致动器，开发了一种小型化的双模、可重构光束形成装置。通过调制入射光的偏振，我们可以在光束阵列扫描模式和闪光照明模式之间切换该装置的输出光束。在扫描模式下，通过驱动微致动器实现±100μm的横向平移，该装置展示了连续可调的角分辨率和±35°的视场（FoV）。在闪光模式下，可实现整个视场均匀照明。作为概念验证，我们提出了一种自适应3D重建方案利用该装置切换操作模式和调整探测分辨率的能力。所提出的装置和探测方案共同构成了一个双模LiDAR系统，展示了对不同环境的高度适应性，并推动了更高效、紧凑的3D探测系统的应用。
