Virtual-Moving Metalens Array Enabling Light-Field Imaging with Enhanced Resolution

Min Kyu Park; Chul Soon Park; Yong Seok Hwang; Eun Soo Kim; Duk Yong Choi; Sang Shin Lee

doi:10.1002/adom.202000820

Virtual-Moving Metalens Array Enabling Light-Field Imaging with Enhanced Resolution

Min Kyu Park, Chul Soon Park, Yong Seok Hwang, Eun Soo Kim, Duk Yong Choi, Sang Shin Lee^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

The light-field (LF) imaging technique can obtain the light intensity and directional ray distribution information by utilizing a microlens array (MLA). Based on the recoded 3D information, full-parallax or depth-slice images can be reconstructed. Due to the limited ray sampling rate of the MLA, however, conventional LF imaging schemes are fatally susceptible to a trade-off between the spatial and angular resolution. To mitigate this issue, a virtual-moving metalens array (VMMA) based on a multifunctional dielectric metasurface is proposed, which can laterally shift the sampling position without physical movement, by simply tailoring the polarization of incident beam. Thanks to the polarization-tailored VMMA, the LF imaging scheme is successfully realized to provide a fourfold enhanced spatial resolution without sacrificing the angular resolution.

Original language	English
Article number	2000820
Journal	Advanced Optical Materials
Volume	8
Issue number	21
DOIs	https://doi.org/10.1002/adom.202000820
Publication status	Published - 1 Nov 2020

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title = "Virtual-Moving Metalens Array Enabling Light-Field Imaging with Enhanced Resolution",

abstract = "The light-field (LF) imaging technique can obtain the light intensity and directional ray distribution information by utilizing a microlens array (MLA). Based on the recoded 3D information, full-parallax or depth-slice images can be reconstructed. Due to the limited ray sampling rate of the MLA, however, conventional LF imaging schemes are fatally susceptible to a trade-off between the spatial and angular resolution. To mitigate this issue, a virtual-moving metalens array (VMMA) based on a multifunctional dielectric metasurface is proposed, which can laterally shift the sampling position without physical movement, by simply tailoring the polarization of incident beam. Thanks to the polarization-tailored VMMA, the LF imaging scheme is successfully realized to provide a fourfold enhanced spatial resolution without sacrificing the angular resolution.",

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AU - Park, Min Kyu

AU - Park, Chul Soon

AU - Hwang, Yong Seok

AU - Kim, Eun Soo

AU - Choi, Duk Yong

AU - Lee, Sang Shin

PY - 2020/11/1

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N2 - The light-field (LF) imaging technique can obtain the light intensity and directional ray distribution information by utilizing a microlens array (MLA). Based on the recoded 3D information, full-parallax or depth-slice images can be reconstructed. Due to the limited ray sampling rate of the MLA, however, conventional LF imaging schemes are fatally susceptible to a trade-off between the spatial and angular resolution. To mitigate this issue, a virtual-moving metalens array (VMMA) based on a multifunctional dielectric metasurface is proposed, which can laterally shift the sampling position without physical movement, by simply tailoring the polarization of incident beam. Thanks to the polarization-tailored VMMA, the LF imaging scheme is successfully realized to provide a fourfold enhanced spatial resolution without sacrificing the angular resolution.

AB - The light-field (LF) imaging technique can obtain the light intensity and directional ray distribution information by utilizing a microlens array (MLA). Based on the recoded 3D information, full-parallax or depth-slice images can be reconstructed. Due to the limited ray sampling rate of the MLA, however, conventional LF imaging schemes are fatally susceptible to a trade-off between the spatial and angular resolution. To mitigate this issue, a virtual-moving metalens array (VMMA) based on a multifunctional dielectric metasurface is proposed, which can laterally shift the sampling position without physical movement, by simply tailoring the polarization of incident beam. Thanks to the polarization-tailored VMMA, the LF imaging scheme is successfully realized to provide a fourfold enhanced spatial resolution without sacrificing the angular resolution.

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Virtual-Moving Metalens Array Enabling Light-Field Imaging with Enhanced Resolution

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