Video-rate high-precision time-frequency multiplexed 3D coherent ranging.
Video-rate high-precision time-frequency multiplexed 3D coherent ranging.
复制标题
视频速率高精度时频复用三维相干测距。
DOI：
10.1038/s41467-022-29177-9
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发表时间：
2022-03-29
影响因子：
16.6
通讯作者：
Izatt JA
中科院分区：
文献类型：
--
作者：
Qian R;Zhou KC;Zhang J;Viehland C;Dhalla AH;Izatt JA
调频连续波(FMCW)光探测和测距(LiDAR)是一种新兴的三维测距技术，具有高灵敏度和测距精度。由于数字化仪带宽的限制和机械扫描仪波束控制的速度限制，米级FMCW激光雷达系统通常存在3D帧速率低的问题，这极大地限制了它们在动态场景实时成像中的应用。在这项工作中，我们报告了一种基于高速FMCW的3D成像系统，结合了用于波束控制的光栅和用于深度恢复的压缩时频分析方法。从理论和实验两方面对系统的定位精度和定位精度进行了深入的研究。最后，我们展示了多个静态和运动目标的3D成像结果，包括一只弯曲的手。展示的技术在几十厘米的成像范围内实现了亚毫米定位精度，总深度体素采集率为7.6MHZ，能够以视频速率进行密集采样的3D成像。调频连续波激光雷达一直受到3D帧速率有限的影响。在这里，作者结合了用于波束控制的光栅和用于深度恢复的压缩时频分析，并展示了具有亚毫米定位精度的运动目标的实时密集采样3D成像。
Frequency-modulated continuous wave (FMCW) light detection and ranging (LiDAR) is an emerging 3D ranging technology that offers high sensitivity and ranging precision. Due to the limited bandwidth of digitizers and the speed limitations of beam steering using mechanical scanners, meter-scale FMCW LiDAR systems typically suffer from a low 3D frame rate, which greatly restricts their applications in real-time imaging of dynamic scenes. In this work, we report a high-speed FMCW based 3D imaging system, combining a grating for beam steering with a compressed time-frequency analysis approach for depth retrieval. We thoroughly investigate the localization accuracy and precision of our system both theoretically and experimentally. Finally, we demonstrate 3D imaging results of multiple static and moving objects, including a flexing human hand. The demonstrated technique achieves submillimeter localization accuracy over a tens-of-centimeter imaging range with an overall depth voxel acquisition rate of 7.6 MHz, enabling densely sampled 3D imaging at video rate. Frequency-modulated continuous wave LiDAR has suffered from limited 3D frame rates. Here, the authors combine a grating for beam steering with a compressed time-frequency analysis for depth retrieval, and demonstrate real-time densely sampled 3D imaging of moving objects with submillimetre localization accuracy.
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影响因子：
11.2
作者：
Behroozpour, Behnam;Sandborn, Phillip A. M.;Boser, Bernhard E.
通讯作者：
Boser, Bernhard E.
影响因子：
3.8
作者：
Okano, Masayuki;Chong, Changho
通讯作者：
Chong, Changho
影响因子：
10.4
作者：
Hutchison, David N.;Sun, Jie;Rong, Haisheng
通讯作者：
Rong, Haisheng
DOI：
10.1109/jstqe.2017.2707181
发表时间：
2017-11-01
影响因子：
4.9
作者：
Qiao, Pengfei;Cook, Kevin T.;Chang-Hasnain, Connie J.
通讯作者：
Chang-Hasnain, Connie J.
影响因子：
3.8
作者：
Hariyama, Tatsuo;Sandborn, Phillip A. M.;Wu, Ming C.
通讯作者：
Wu, Ming C.