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相关概念视频

Phase Contrast and Differential Interference Contrast Microscopy01:26

Phase Contrast and Differential Interference Contrast Microscopy

Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
Confocal Fluorescence Microscopy01:16

Confocal Fluorescence Microscopy

Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
X-ray Imaging01:24

X-ray Imaging

German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with X-rays, and by 1900, X-ray was widely...

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相关实验视频

Updated: Jun 19, 2026

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
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无参考,基于格子的,单次射击的X射线相位对比成像与优化的激光驱动的K-α源.

V Bouffetier, G Pérez-Callejo, D Stutman

    Optics express
    |June 14, 2025
    PubMed
    概括

    我们开发了一种用于激光生成源的新型X射线相位成像诊断. 这台塔尔博特X射线偏光仪 (TXD) 克服了宽带X射线光谱的挑战,使高能量密度物理学的新应用成为可能.

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    Dynamic Pore-scale Reservoir-condition Imaging of Reaction in Carbonates Using Synchrotron Fast Tomography
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    相关实验视频

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    科学领域:

    • 物理 物理学 物理
    • 材料科学 材料科学 材料科学
    • 光学是什么?光学是什么?光学是什么?

    背景情况:

    • 在生物学,医学和高能量密度 (HED) 物理学中,X射线相位成像对低Z材料非常有价值.
    • 传统的X射线相位成像方法使用同步光或X射线管.
    • 激光生成的X射线源具有独特的特性,但对诊断提出了挑战.

    研究的目的:

    • 为激光生成的K-αX射线源开发和合格一款基于格子的新型塔尔博特X射线偏光仪 (TXD).
    • 为了研究X射线源色谱对TXD性能的影响.
    • 为了优化TXD参数用于宽带,激光产生的X射线源.

    主要方法:

    • 结合一个基于格子的Talbot X射线偏光仪 (TXD) 与产生K-α X射线的多特拉瓦特激光系统.
    • 来自各种激光产生的源的X射线辐射的特征.
    • 系统合格的激光,目标和偏光仪参数,以提高TXD性能.

    主要成果:

    • 在高功率激光设备上演示了第一个基于无参考格子的X射线成像.
    • 确定了X射线源的色谱性作为影响TXD图像质量的关键因素.
    • 用宽带激光产生的X射线源确定TXD操作的最佳参数.

    结论:

    • 开发的塔尔博特X射线偏光仪 (TXD) 适用于表征激光产生的X射线源.
    • 这一进步使得X射线相位成像在高能量密度物理研究中的新应用成为可能.
    • 优化TXD性能需要仔细考虑激光产生的X射线的宽带光谱.