Lensless LED matrix ptychographic microscope: problems and solutions.
Lensless LED matrix ptychographic microscope: problems and solutions.
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DOI：
10.1364/ao.57.001800
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发表时间：
2018-03
期刊：
影响因子：
1.9
通讯作者：
Peng Li;A. Maiden
中科院分区：
文献类型：
--
作者：
Peng Li;A. Maiden
本文提出了一种基于重叠关联成像的无透镜显微镜。它处理了传统重叠关联成像所需的机械运动，而是使用LED矩阵来获得不同的衍射数据集。该数据受到偏离重叠关联的标准版本的多个实验因素的影响：即，LED位置的不精确知识、部分时间和空间相干性以及各个LED之间的不同亮度和照明分布。尽管存在这些困难，我们在这里表明，在重叠关联数据的多样性允许迭代相位恢复算法恢复优秀的，高分辨率的图像的分辨率测试目标和生物样品。
In this paper, a lensless microscope based on ptychography is presented. It disposes of the mechanic movement necessary for conventional ptychography, instead using an LED matrix to obtain a diverse set of diffraction data. This data is subject to multiple experimental factors that deviate from the standard version of ptychography: namely, imprecise knowledge of the LED positions, partial temporal and spatial coherence, and varying brightness and illumination distribution between individual LEDs. Despite these difficulties, we show here that the diversity in the ptychographic data allows an iterative phase retrieval algorithm to recover excellent, high-resolution images of a resolution test target and a biological sample.