论文标题
对色素计算成像的焦点金属的扩展深度的设计和分析
Design and Analysis of Extended Depth of Focus Metalenses for Achromatic Computational Imaging
论文作者
论文摘要
Metasurface光学元件表现出在超紧凑和轻巧的外形以实现传统光学组件的巨大潜力。但是，元表面镜头（也称为金属镜）遭受了严重的色差，对其实际使用构成了严重的限制。通过分散工程来规避此类像差的现有方法仅限于小孔，并且通常需要每个单位细胞的多个散射器，其特征尺寸很小。在这里，我们提出了一种减轻色差的替代技术，并使用扩展的焦点（EDOF）金属镜和计算重建表现出高质量的全彩成像。以前的EDOF金属依赖于图像中诱导不对称伪影的立方相掩模，而在这里我们证明了使用可以改善随后的图像质量的对称相掩码，包括对数千片，并移动了a tocion axicon蒙版。我们的工作将激发除分散工程和开放有关混合光学数字元毛面系统的新研究途径之外的色彩金属的进一步发展。
Metasurface optics have demonstrated vast potential for implementing traditional optical components in an ultra-compact and lightweight form factor. Metasurface lenses, also called metalenses, however, suffer from severe chromatic aberrations, posing serious limitations on their practical use. Existing approaches for circumventing such aberrations via dispersion engineering are limited to small apertures and often entails multiple scatterers per unit cell with small feature sizes. Here, we present an alternative technique to mitigate chromatic aberration and demonstrate high-quality, full-color imaging using extended depth of focus (EDOF) metalenses and computational reconstruction. Previous EDOF metalenses relied on cubic phase masks that induced asymmetric artifacts in images, whereas here we demonstrate the use of symmetric phase masks that can improve subsequent image quality, including logarithmic-aspherical, and shifted axicon masks. Our work will inspire further development in achromatic metalenses beyond dispersion engineering and open new research avenues on hybrid optical-digital metasurface systems.
