Multifunctional Spaceplates for Optical Aberration Correction

Spaceplates
are nonlocal optical devices with the potential to
reduce the form factor of optical systems, but current implementations
are limited in performance and ability to correct for optical aberrations.
We introduce a new class of multifunctional spaceplates, designed
using gradient-based freeform optimization, which exhibit exceptional
efficiencies, compression ratios, and aberration correcting capabilities.
We show that such spaceplates can serve as correctors for metasurfaces
and refractive optical elements, and we demonstrate that multifunctional
spaceplates can extend to support multispectral, Petzval field curvature,
and spherical aberration correction. We anticipate that these spaceplate
concepts will enable the realization of ultracompact optical systems.

空间平板（spaceplates）是一类具备缩小光学系统外形尺寸潜力的非局域光学器件，但当前的空间平板器件在性能与光学像差校正能力上存在局限。本文提出一类新型多功能空间平板，其通过基于梯度的自由曲面优化方法设计，展现出优异的光学效率、压缩比与像差校正能力。研究表明，此类空间平板可作为超表面与折射光学元件的校正器件；实验证实，多功能空间平板可支持多光谱、匹兹伐场曲与球差的校正。我们预计，该空间平板技术理念将助力超紧凑光学系统的实现。