建立首个三维微粒辅助超分辨显微的理论模型，揭示光照部分相干性关键作用。
Theoretical Model of Microparticle-Assisted Super-Resolution Microscopy
- 基于波光学构建三维理论模型，模拟虚拟成像过程。
- 发现光照部分相干性是实现超分辨的必要条件，微球尺寸越大分辨率越高。
- 提出抑制入射光法向分量的新照明策略，提升对比度与分辨率，适合光学成像研究者。
本文首次建立了微粒辅助超分辨成像的三维理论模型，可准确模拟虚拟图像形成过程。研究表明，考虑照明光的部分空间相干性是实现超分辨的根本前提。我们提出一种新型照明策略，通过抑制入射光的法向分量来增强图像对比度和分辨率。结果表明，随着被观测物体尺寸增大，微球辅助成像的光学分辨率也随之提高。文中给出了微球辅助成像中分辨率准则的解析估计。研究结果建立了一个一致的波光学框架，能够重现实验中观察到的亚波长成像现象，并阐明其物理机制。
原文摘要 · Abstract (English)
We present the first three-dimensional theoretical model of microparticle-assisted super-resolution imaging, enabling accurate simulation of virtual image formation. The model reveals that accounting for partial spatial coherence of illumination is a fundamental prerequisite for achieving super-resolution. We also propose a novel illumination strategy based on suppressing the normal component of incident light, which enhances image contrast and resolution. It is shown that as the size of the investigated objects increases, the optical resolution of the microsphere improves. An analytical estimate for the resolution criterion in microsphere-assisted imaging is presented. The results establish a consistent wave-optical framework that reproduces experimentally observed subwavelength imaging and clarifies the underlying physical mechanisms.
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