arXiv:2509.05549physics.opticseess.IV2025-09被引 1

用混合光照加速显微成像,同时自动校正像差

Hybrid-illumination multiplexed Fourier ptychographic microscopy with robust aberration correction

  • 混合光照+解析算法,减少测量次数
  • 20次测量实现1.08微米分辨率,4倍超越衍射极限
  • 适合病理全片扫描等高通量生物成像场景

傅里叶相衬显微镜(FPM)是一种强大的计算成像技术,可实现生物样本的高空间带宽积成像。然而,其应用受限于需逐个采集光源导致的数据获取速度慢。多路复用FPM策略通过同时激活多个LED来加速成像,但通常需要精细参数调节,且缺乏有效的像差校正能力,易造成图像退化。为此,我们提出混合光照多路复用傅里叶相衬显微镜(HMFPM),将解析像差提取能力与多路复用照明效率相结合。HMFPM采用混合照明策略和定制重建算法,融合解析方法与优化方法。该策略显著减少所需测量数,同时确保鲁棒的像差校正与稳定收敛。实验表明,HMFPM在20次测量下,于1.77×1.77毫米方型视场内实现1.08微米分辨率,较系统相干衍射极限提升4倍;对多种像差具有鲁棒性,支持最高84微米数字焦距调节,并有效校正全片病理切片中的场依赖性和扫描引入像差。结果确立了HMFPM作为实用、高通量、无像差的生物医学成像解决方案。

原文摘要 · Abstract (English)

Fourier ptychographic microscopy (FPM) is a powerful computational imaging modality that achieves high space-bandwidth product imaging for biomedical samples. However, its adoption is limited by slow data acquisition due to the need for sequential measurements. Multiplexed FPM strategies have been proposed to accelerate imaging by activating multiple LEDs simultaneously, but they typically require careful parameter tuning, and their lack of effective aberration correction makes them prone to image degradation. To address these limitations, we introduce hybrid-illumination multiplexed Fourier ptychographic microscopy (HMFPM), which integrates analytic aberration extraction capability with the efficiency of multiplexed illumination. Specifically, HMFPM employs a hybrid illumination strategy and a customized reconstruction algorithm with analytic and optimization methods. This hybrid strategy substantially reduces the number of required measurements while ensuring robust aberration correction and stable convergence. We demonstrate that HMFPM achieves 1.08 micrometers resolution, representing a 4-fold enhancement over the system's coherent diffraction limit, across a 1.77x1.77 millimeter square field of view using 20 measurements. HMFPM remains robust under diverse aberrations, providing up to 84 micrometers digital refocusing capability, and effectively corrects both field-dependent and scanning-induced aberrations in whole-slide pathology imaging. These results establish HMFPM as a practical, high-throughput, and aberration-free solution for biological and biomedical imaging.

显微成像计算光学像差校正多路复用

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