Article https://doi.org/10.1038/s41467-023-36812-6 Monocular metasurface camera for passive single-shot 4D imaging Zicheng Shen1, Feng Zhao1, Chunqi Jin1, Shuai Wang 1, Liangcai Cao 1 & Yuanmu Yang 1 It is a grand challenge for an imaging system to simultaneously obtain multi- dimensional light field information, such as depth and polarization, of a scene for the accurate perception of the physical world. However, such a task would conventionally require bulky optical components, time-domain multiplexing, and active laser illumination. Here, we experimentally demonstrate a compact monocular camera equipped with a single-layer metalens that can capture a 4D image, including 2D all-in-focus intensity, depth, and polarization of a target scene in a single shot under ambient illumination conditions. The metalens is optimized to have a conjugate pair of polarization-decoupled rotating single- helix point-spread functions that are strongly dependent on the depth of the target object. Combined with a straightforward, physically interpretable image retrieval algorithm, the camera can simultaneously perform high-accuracy depth sensing and high-fidelity polarization imaging over an extended depth of field for both static and dynamic scenes in both indoor and outdoor environments. Such a compact multi-dimensional imaging system could enable new applications in diverse areas ranging from machine vision to microscopy. Conventional cameras can only capture 2D images. In recent years, there has been a rapid development in 3D imaging techniques1–3 towards emerging applications such as consumer electronics and autonomous driving. Moreover, a camera that can capture extra dimensions of the light field information, such as polarization and spectrum, may reveal even richer cha
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Monocular metasurface camera for passive single-shot 4D imaging
Zicheng Shen, Feng Zhao, Chunqi Jin, Shuai Wang, Liangcai Cao, Yuanmu Yang
Research context
It is a grand challenge for an imaging system to simultaneously obtain multi-dimensional light field information, such as depth and polarization, of a scene for the accurate perception of the physical world. However, such a task would conventionally require bulky optical components, time-domain multiplexing, and active laser illumination. Here, we experimentally demonstrate a compact monocular camera equipped with a single-layer metalens that can capture a 4D image, including 2D all-in-focus intensity, depth, and polarization of a target scene in a single shot under ambient illumination conditions. The metalens is optimized to have a conjugate pair of polarization-decoupled rotating single-helix point-spread functions that are strongly dependent on the depth of the target object. Combined with a straightforward, physically interpretable image retrieval algorithm, the camera can simultaneously perform high-accuracy depth sensing and high-fidelity polarization imaging over an extended depth of field for both static and dynamic scenes in both indoor and outdoor environments. Such a compact multi-dimensional imaging system could enable new applications in diverse areas ranging from mac
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Zicheng Shen, Feng Zhao, Chunqi Jin, Shuai Wang, Liangcai Cao, Yuanmu Yang. Monocular metasurface camera for passive single-shot 4D imaging. Nature Communications (2023). https://doi.org/10.1038/s41467-023-36812-6
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