Wide-angle optical systems play a vital role in imaging applications and have been researched for many years. In traditional lenses, attaining a wide field of view (FOV) by using a single optical component is difficult because these lenses have crucial aberrations. In this study, we developed a wide-angle metalens with a numerical aperture of 0.25 that provided a diffraction-limited FOV of over 170° for a wavelength of 532 nm without the need for image stitching or multiple lenses. The designed wide-angle metalens is free of aberration and polarization, and its full width of half maximum is close to the diffraction limit at all angles. Moreover, the metalens which is designed through a hexagonal arrangement exhibits higher focusing efficiency at all angles than most-seen square arrangement. The focusing efficiencies are as high as 82% at a normal incident and 45% at an incident of 85°. Compared with traditional optical components, the proposed metalens exhibits higher FOV and provides a more satisfactory image quality because of aberration correction. Because of the advantages of the proposed metalens, which are difficult to achieve for a traditional single lens, it has the potential to be applied in camera systems and virtual and augmented reality.

广角光学系统在成像应用中起着至关重要的作用，并且已经研究了很多年。在传统镜头中，通过使用单个光学组件获得宽视场 (FOV) 是困难的，因为这些镜头具有关键的像差。在这项研究中，我们开发了一种数值孔径为 0.25 的广角超透镜，它为 532 nm 的波长提供了超过 170° 的衍射极限 FOV，而无需图像拼接或多透镜。所设计的广角超透镜无像差和偏振，其半高宽在各个角度均接近衍射极限。此外，通过六边形排列设计的超透镜在所有角度都比常见的方形排列具有更高的聚焦效率。聚焦效率在正常入射时高达 82%，在 85° 入射时高达 45%。与传统的光学元件相比，所提出的超透镜具有更高的 FOV，并且由于像差校正，提供了更令人满意的图像质量。由于所提出的元透镜具有传统单镜头难以实现的优势，因此它具有应用于相机系统以及虚拟和增强现实的潜力。