Single-shot deterministic complex amplitude imaging with a single-layer metalens

作者：Liu Li, Shuai Wang, Feng Zhao, Yixin Zhang, Shun Wen, Huichao Chai, Yunhui Gao, Wenhui Wang, Liangcai Cao, Yuanmu Yang · 发表于：arXiv (Cornell University) · 年份：2023 · DOI：10.48550/arxiv.2309.16123 · 被引用次数：4 · 研究领域：Optical measurement and interference techniques、Optical Polarization and Ellipsometry、Digital Holography and Microscopy

Conventional imaging systems can only capture light intensity. Meanwhile, the lost phase information may be critical for a variety of applications such as label-free microscopy and optical metrology. Existing phase retrieval techniques typically require a bulky setup, multi-frame measurements, or prior information of the target scene. Here, we proposed an extremely compact system for complex amplitude imaging, leveraging the extreme versatility of a single-layer metalens to generate spatially-multiplexed and polarization-phase-shifted point spread functions. Combining the metalens with a polarization camera, the system can simultaneously record four polarization shearing interference patterns along both in-plane directions, thus allowing the deterministic reconstruction of the complex amplitude light field in a single shot. Using an incoherent light-emitting diode as the illumination, we experimentally demonstrated speckle-noise-free complex amplitude imaging for both static and moving objects with tailored magnification ratio and field-of-view. The miniaturized and robust system may open the door for complex amplitude imaging in portable devices for point-of-care applications.