Light field imaging and sensing using a broadband achromatic metalens array

Mu Ku Chen; Cheng Hung Chu; Ren Jie Lin; Jia-Wern Chen; Yi-Teng Huang; Tzu-Ting Huang; Hsin Yu Kuo; Vin-Cent Su; Shuming Wang; Tao Li; Zhenlin Wang; Shining Zhu; Din Ping Tsai

doi:10.1117/12.2568324

20 August 2020 Light field imaging and sensing using a broadband achromatic metalens array

Mu Ku Chen, Cheng Hung Chu, Ren Jie Lin, Jia-Wern Chen, Yi-Teng Huang, Tzu-Ting Huang, Hsin Yu Kuo, Vin-Cent Su, Shuming Wang, Tao Li, Zhenlin Wang, Shining Zhu, Din Ping Tsai

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Proceedings Volume 11500, ODS 2020: Industrial Optical Devices and Systems; 1150003 (2020) https://doi.org/10.1117/12.2568324
Event: SPIE Optical Engineering + Applications, 2020, Online Only

Abstract

We design and fabricate a 60 × 60 GaN based achromatic meta-lens array to capture multidimensional optical information of the scene. The working wavelength is from 400 nm to 660 nm which covers the entire visible light range. The highest efficiency of single metalens can be up to 74% at a wavelength of 420 nm, while the average efficiency is approximately 39% over the whole working bandwidth. The light field images and the depth information of objects can be determined by reorganizing the patches of sub-images and calculating the disparity of neighboring sub-images, respectively. The depth information can be used to optimize the patch sizes to render the all-in-focus image without artifacts. Our work provides several advantages associated with light field imaging: elimination of chromatic aberration, polarization selectivity and compatibility of the semiconductor process.

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Mu Ku Chen, Cheng Hung Chu, Ren Jie Lin, Jia-Wern Chen, Yi-Teng Huang, Tzu-Ting Huang, Hsin Yu Kuo, Vin-Cent Su, Shuming Wang, Tao Li, Zhenlin Wang, Shining Zhu, and Din Ping Tsai "Light field imaging and sensing using a broadband achromatic metalens array", Proc. SPIE 11500, ODS 2020: Industrial Optical Devices and Systems, 1150003 (20 August 2020); https://doi.org/10.1117/12.2568324

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KEYWORDS

Imaging arrays

Augmented reality

Microscopy

Chromatic aberrations

Gallium nitride

Multiplexing

Polarization

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