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Confocal Fluorescence Microscopy01:16

Confocal Fluorescence Microscopy

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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,...
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Phase Contrast and Differential Interference Contrast Microscopy01:26

Phase Contrast and Differential Interference Contrast Microscopy

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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...
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相关实验视频

Updated: Jun 28, 2025

Direct Imaging of Laser-driven Ultrafast Molecular Rotation
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图像聚焦激光差异干扰测量成像聚焦激光差异干扰测量

Andrew W Marsh, Alice N Kramer, Kevin N Maranto

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    |April 15, 2024
    PubMed
    概括
    此摘要是机器生成的。

    用于聚焦激光差干扰测量 (FLDI) 的新折射光学成像概念可以在没有扫描的情况下创建2D图像. 这种先进的技术可以降低噪声,以便在高速流动中更好地测量密度波动.

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    Image-guided, Laser-based Fabrication of Vascular-derived Microfluidic Networks
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    科学领域:

    • 流体动力学 流体动力学
    • 光学诊断仪器的使用.
    • 流体物理学的流体物理

    背景情况:

    • 聚焦激光差异干扰测量 (FLDI) 对于高速流密度波动测量至关重要.
    • 目前具有高动态范围的FLDI方法仅限于光二极管测量.
    • 复杂流程中的空间分辨率需要先进的FLDI技术.

    研究的目的:

    • 引入一种新的折射光学成像FLDI概念,用于2D空间分辨率.
    • 为了减少FLDI成像中的测量噪声底部.
    • 为了能够详细研究超音速和超音速流动中的密度波动.

    主要方法:

    • 一个微镜头阵列生成了一个33x33的FLDI点网格.
    • 极化马赫-泽恩德干扰仪被用于光束操纵.
    • 在高速摄像机上成像FLDI点,稍微失焦,以增加每个点的像素,减少噪音.

    主要成果:

    • 折射光学成像FLDI成功地在没有扫描的情况下产生了2D图像.
    • 与传统方法相比,该技术证明了噪音底部降低.
    • 图像显示了明显的冲击结构和流密度在一个不足扩展的喷气.

    结论:

    • 开发的折射光学成像FLDI概念提供了2D数据集,降低了噪音.
    • 这种方法增强了对超音速和超音速流动中的密度波动的研究.
    • 它为空间解析的流量诊断提供了显著的进步.