arXiv 2309.113482023-09-20physics.opticsq-bio.QM

基于超透镜的定量相位成像

Quantitative Phase Imaging with a Metalens

Aamod Shanker, Johannes Froech, Saswata Mukherjee, Maksym Zhelyeznyakov, Eric Seibel, Arka Majumdar

AI总结：

本文提出在光纤内窥镜尖端集成色散型氮化硅超透镜，利用光谱复用单次采集实现定量相位成像，视场280、灵敏度0.1λ，无需滤光片、干涉对准或机械扫描。

摘要：

定量相位成像（QPI）从相机测得的光强中恢复光的精确波前。通过这些量化的相位偏移，可以提取半透明微观物体的形貌图。我们展示了在光纤内窥镜尖端使用色散型氮化硅超透镜进行定量相位成像。我们的方法利用光谱复用技术，在单次采集中从多个离焦平面恢复相位。这个半毫米宽的超透镜在与内窥镜光纤束结合的实验中展示了相位成像能力，视场为280，灵敏度为0.1λ。由于光谱功能直接编码在成像透镜中，因此不需要额外的滤光片。相位成像系统扩展中的关键限制，如多次采集、干涉对准或机械扫描，在所提出的方案中被完全消除。

英文摘要：

Quantitative phase imaging (QPI) recovers the exact wavefront of light from the intensity measured by a camera. Topographical maps of translucent microscopic bodies can be extracted from these quantified phase shifts. We demonstrate quantitative phase imaging at the tip of an optical fiber endoscope with a chromatic silicon nitride metalens. Our method leverages spectral multiplexing to recover phase from multiple defocus planes in a single capture. The half millimeter wide metalens shows phase imaging capability with a 280 field of view and 0.1λ sensitivity in experiments with an endoscopic fiber bundle. Since the spectral functionality is encoded directly in the imaging lens, no additional filters are needed. Key limitations in the scaling of a phase imaging system, such as multiple acquisition, interferometric alignment or mechanical scanning are completely mitigated in the proposed scheme

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