Virtual‐Moving Metalens Array Enabling Light‐Field Imaging with Enhanced Resolution,Advanced Optical Materials

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Virtual‐Moving Metalens Array Enabling Light‐Field Imaging with Enhanced Resolution
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2020-09-03 , DOI: 10.1002/adom.202000820
Min‐Kyu Park ₁ , Chul‐Soon Park ₁ , Yong Seok Hwang ₁ , Eun‐Soo Kim _{1,

2} , Duk‐Yong Choi _{3,

4} , Sang‐Shin Lee _{1,

2}

Affiliation

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.

中文翻译：

虚拟移动的Metalens阵列可实现增强分辨率的光场成像

光场（LF）成像技术可以通过利用微透镜阵列（MLA）获得光强度和定向光线分布信息。根据重新编码的3D信息，可以重建全视差或深度切片图像。但是，由于MLA的光线采样率有限，传统的LF成像方案非常容易受到空间分辨率和角度分辨率之间的折衷的影响。为了缓解这个问题，提出了一种基于多功能介电超表面的虚拟移动金属元阵列（VMMA），该阵列可以通过简单地调整入射光束的偏振来横向移动采样位置而无需物理移动。由于采用了经过极化处理的VMMA，LF成像方案得以成功实现，从而在不牺牲角分辨率的情况下提供了四倍的空间分辨率。

更新日期：2020-11-04

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