Millimeter-precision positioning for wide-angle indoor area enabled by metalens-integrated camera

IF 6.5 2区物理与天体物理 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Nanophotonics Pub Date : 2024-08-28 DOI:10.1515/nanoph-2024-0277

Muyang Li, Yue Wu, Haobai Li, Zi-Wen Zhou, Yanxiang Zhang, Zhongyi Yuan, Zaichen Zhang, Ji Chen

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Abstract

Due to signal shielding caused by building structures, conventional mature positioning technologies such as the Global Positioning System (GPS) are only suitable for outdoor navigation and detection. However, there are many scenarios that urgently require high-precision indoor positioning technologies, such as indoor wireless optical communications (OWCs), navigation in large buildings, and warehouse management. Here, we proposed a millimeter-precision indoor positioning technology based on metalens-integrated camera, which determines the position of the device through imaging of beacon LEDs. Thanks to the wide-angle imaging design of our metalens, the camera can accurately capture images of beacon LEDs even when it is situated in distant corner locations. Consequently, our localization scheme achieves millimeter-level positioning accuracy across majority of wide-angle (∼120°) indoor area. Compared to traditional positioning schemes by photodiode (PD), our imaging-based approach demonstrates superior resistance to interference, thereby safeguarding positioning precision from the external signals influence. Furthermore, the compact dimensions and high performances of the positioning device make it suitable for integration into highly portable devices, such as smartphones and drones, revealing its broad potential applications in the future.

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利用金属膜集成摄像头实现毫米级精度室内广角定位

由于建筑物结构对信号的屏蔽，全球定位系统（GPS）等传统的成熟定位技术仅适用于室外导航和探测。然而，有许多场景迫切需要高精度的室内定位技术，如室内无线光通信（OWC）、大型建筑内导航和仓库管理等。在此，我们提出了一种基于金属膜集成摄像头的毫米级精度室内定位技术，该技术通过信标 LED 的成像来确定设备的位置。得益于金属片的广角成像设计，即使摄像头位于遥远的角落位置，也能准确捕捉到信标 LED 的图像。因此，我们的定位方案可在大部分广角（∼120°）室内区域实现毫米级定位精度。与传统的光电二极管（PD）定位方案相比，我们基于成像的方法具有更强的抗干扰能力，从而确保定位精度不受外部信号的影响。此外，该定位装置尺寸小、性能高，适合集成到智能手机和无人机等高度便携的设备中，在未来具有广阔的应用前景。

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来源期刊

Nanophotonics NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

13.50

自引率

6.70%

发文量

358

审稿时长

7 weeks

期刊介绍： Nanophotonics, published in collaboration with Sciencewise, is a prestigious journal that showcases recent international research results, notable advancements in the field, and innovative applications. It is regarded as one of the leading publications in the realm of nanophotonics and encompasses a range of article types including research articles, selectively invited reviews, letters, and perspectives. The journal specifically delves into the study of photon interaction with nano-structures, such as carbon nano-tubes, nano metal particles, nano crystals, semiconductor nano dots, photonic crystals, tissue, and DNA. It offers comprehensive coverage of the most up-to-date discoveries, making it an essential resource for physicists, engineers, and material scientists.