Ultra-compact snapshot spectral light-field imaging

Xia, Hua; Wang, Yujie; Wang, Shuming; Zou, Xiujuan; Li, Lin; Yan, Feng; Cao, Xun; Xiao, Shumin; Tsai, Din Ping; Han, Jiecai; Wang, Zhenlin; Zhu, Shining

doi:10.1038/s41467-022-30439-9

Cited by 90 publications

(55 citation statements)

References 28 publications

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“…For example, in light-field imaging, metasurfaces can be divided into two types based on their detection mode. One is active detection by providing projection illumination ,,, and the other is passive detection via versatile focusing. , In addition to the active detection works, ,, a metasurface-based structured light projecting device, with ∼10 K dot array over a 180° FoV, was reported . Using a stereomatching algorithm, 3D imaging within 1 m was experimentally demonstrated.…”

Section: Wavefront Shaping Based On Metasurfacesmentioning

confidence: 99%

Recent Advances and Prospects of Optical Metasurfaces

et al. 2023

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As an artificial planar composite medium, optical metasurfaces exhibit powerful multidimensional optical modulations at the subwavelength scale. With the aid of intelligent algorithms, versatile wavefront engineering and holographic multiplexing based on optical metasurfaces are being intensively developed. Micronano manufacturing technology provides indispensable support for proof-of-concept and mass production. With the support of these advanced technologies, optical metasurfaces have been developed for a wide range of applications and their compactness, versatility, and compatibility have been fully demonstrated. In this Perspective, we summarize recent advances. In addition, we discuss the challenges and prospects of optical metasurfaces.

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Section: Wavefront Shaping Based On Metasurfacesmentioning

confidence: 99%

Recent Advances and Prospects of Optical Metasurfaces

et al. 2023

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“…At present, there are many researches on computational imaging using metasurfaces, such as full-color achromatic imaging 13 , depth estimation 14,15 , extended depth of field 16 , spectral imaging 14,17 , etc. In addition, a more general computational imaging framework with differentiable metasurfaces was proposed 18 .…”

Section: Introductionmentioning

confidence: 99%

Inverse design of metasurfaces for end-to-end computational imaging

Zhang¹,

Yu²,

Liu³

et al. 2023

Optoelectronic Imaging and Multimedia Technology IX

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Metasurfaces, composed of two-dimensional arrays of subwavelength optical scatterers, are regarded as powerful substitutes to conventional diffractive and refractive optics. In addition, metasurfaces with powerful wavefront manipulation capabilities can steer the phase, amplitude, and polarization of light, which provides the potential to joint optimization with algorithms by encoding and decoding the light fields. In this paper, we propose an end-to-end computational imaging system which is joint optimized of metaoptics and neural networks based on the designed initial phase. We construct the forward model of the unit cell to the optical response and the inverse mapping of the optical response to the unit cell for the differentiable front-end metaoptics. Based on the appropriate initial phase, the calculation of the framework would converge faster, and the proposed system will promote the further development of metaoptics and computational imaging.

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“…Recently, metasurfaces have been desired for their compactness, which makes them promising alternatives to the heavy and complicated bulk optical devices. A metasurface consisting of dense arrangements of nano-antennas could precisely control the phase, intensity, polarization, orbital angular momentum, and frequency of incident light [10]. In 2020, Jian Xiong et,al use the metasurfaces to do one-shot ultraspectral imaging, and they can reconstruct ultraspectral imaging (∆λ/λ~0.001) covering a 300-nm-wide visible spectrum with an ultra-high center-wavelength accuracy of 0.04-nm standard deviation and spectral resolution of 0.8 nm [11].…”

Section: Introductionmentioning

confidence: 99%

A compact compressive hyperspectral imaging system based on metasurface

Liu

Wang

Zhang

et al. 2023

Optoelectronic Imaging and Multimedia Technology IX

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Traditional hyperspectral imagers rely on scanning either the spectral or spatial dimension of the hyperspectral cube with spectral filters or line-scanning which can be time consuming and generally require precise moving parts, increasing the complexity. More recently, snapshot techniques have emerged, enabling capture of the full hyperspectral datacube in a single shot. However, some types of these snapshot system are bulky and complicated, which is difficult to apply to the real world. Therefore, this paper proposes a compact snapshot hyperspectral imaging system based on compressive theory, which consists of the imaging lens, light splitter, micro lens array, a metasurface-covered sensor and an RGB camera. The light of the object first passes through the imaging lens, and then a splitter divides the light equally into two directions. The light in one direction pass through the microlens array and then the light modulation is achieved by using a metasurface on the imaging sensor. Meanwhile, the light in another direction is received directly by an RGB camera. This system has the following advantages: first, the metasurface supercell can be well designed and arranged to optimize the transfer matrix of the system; second, the microlens array guarantee that the light incident on the metasurface at a small angle, which eliminate the transmittance error introduced by the incidence angle; third, the RGB camera is able to provide side information and help to ease the reconstruction.

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Ultra-compact snapshot spectral light-field imaging

Cited by 90 publications

References 28 publications

Recent Advances and Prospects of Optical Metasurfaces

Recent Advances and Prospects of Optical Metasurfaces

Inverse design of metasurfaces for end-to-end computational imaging

A compact compressive hyperspectral imaging system based on metasurface

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