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相关概念视频

Phase Contrast and Differential Interference Contrast Microscopy01:26

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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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When light of a particular wavelength strikes a metal surface, electrons are emitted. This is called the photoelectric effect. The minimum frequency of light that can cause such emission of electrons is called the threshold frequency, which is specific to the metal. Light with a frequency lower than the threshold frequency, even if it is of high intensity, cannot initiate the emission of electrons. However, when the frequency is higher than the threshold value, the number of electrons ejected...
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相关实验视频

Updated: Sep 11, 2025

High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings
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使用伪热光进行相位对比幻影成像.

Junyan Hu, Binglin Chen, Yan Guo

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    此摘要是机器生成的。

    本研究引入了一种用于双臂相位对比成像的新计算幽灵成像方法,简化了对振幅和相位对象的非局部成像,而不需要完全重建或复杂的扫描.

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    科学领域:

    • 光学和光子学 在光学和光子学.
    • 计算成像技术的成像
    • 相对照显微镜相对照显微镜

    背景情况:

    • 幽灵成像和全息图像使非局部成像成为可能.
    • 双臂相位对比成像可以提取目标边缘,避免完全重建.
    • 现有的方法依赖于摄像机或扫描.

    研究的目的:

    • 提出一个计算的双臂相位对比成像方案.
    • 将螺旋相对比成像与幽灵成像相结合.
    • 为了实现高效的成像与单点检测.

    主要方法:

    • 在光斑照明下进行里埃基调制.
    • 螺旋相对比与幽灵成像的整合.
    • 在两个成像臂中进行单点检测.
    • 压缩采样的实施.

    主要成果:

    • 实验和模拟结果验证了拟议的方案.
    • 通过压缩采样证明有效实施.
    • 研究了斑点连贯度长度和数量对准确度和SNR的影响.

    结论:

    • 拟议的计算方案为双臂相位对比成像提供了一种简化方法.
    • 这种方法即使在压缩采样中也有效.
    • 了解斑点属性对于优化边缘提取和图像质量至关重要.