High numerical aperture large field-of-view metalens imaging

Junjie Hu; Weijian Yang

doi:10.1117/12.2578130

5 March 2021 High numerical aperture large field-of-view metalens imaging

Junjie Hu, Weijian Yang

Proceedings Volume 11695, High Contrast Metastructures X; 116951F (2021) https://doi.org/10.1117/12.2578130
Event: SPIE OPTO, 2021, Online Only

Abstract

Designing a metalens to achieve high resolution, large field-of-view imaging is challenging due to the geometrical aberration of metalens. Here, we report a new approach to tackle this challenge. We first optimize the phase profile of the metalens to balance the focusing ability for light incidences of different angles. While the image suffers some resolution loss due to a small degradation of on-axis focus performance, the field-of-view is significantly increased. We then use a deconvolution method to computationally recover the high-resolution image. Using this hybrid approach, we achieve high quality, high resolution, large field-of-view metalens imaging.

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Junjie Hu and Weijian Yang "High numerical aperture large field-of-view metalens imaging", Proc. SPIE 11695, High Contrast Metastructures X, 116951F (5 March 2021); https://doi.org/10.1117/12.2578130

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KEYWORDS

Image quality

Image resolution

Computational imaging

Imaging systems

Lenses

Optimization (mathematics)

Spatial resolution

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