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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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In the site survey of a four-sided traverse, internal angles are essential to ensure geometric accuracy. The survey revealed that the sum of the measured internal angles was 359 degrees and 48 minutes, which is 12 minutes less than the expected 360 degrees. This discrepancy signals an error likely arising from measurement inaccuracies during the fieldwork.To rectify this error, the adjustment process involved distributing the 12-minute shortfall equally across the four internal angles. By...
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Single-Particle Cryo-EM Data Collection with Stage Tilt using Leginon
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在正方形孔隙之间差异性倾斜.

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    此摘要是机器生成的。

    本研究提出了一种新的公式,用于测量光学流强度,使用方形光圈之间的倾斜差异变量. 这种方法适用于哈特曼传感器,并提供对大气流效应的见解.

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    相关实验视频

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    科学领域:

    • 光学和光子学 在光学和光子学.
    • 大气科学 大气科学
    • 天文学 天文学

    背景情况:

    • 光学流对成像系统产生重大影响,需要精确的测量技术.
    • 哈特曼传感器广泛用于波浪前线传感,依赖于亚孔径倾斜.

    研究的目的:

    • 导出和分析一个表达式,将光学流强度与正方形孔径之间的差异倾斜的方差关系起来.
    • 提供一种方法来计算流强度,使用像哈特曼传感器这样的传感器中的正方形亚孔.

    主要方法:

    • 对差异倾斜方差的新型分析表达式的导出.
    • 导出表达式与循环孔的现有模型进行比较.
    • 开发差异倾斜方差的近似表达式.

    主要成果:

    • 开发了一个表达式,将光学流强度与方形光圈的测量倾斜差异变量联系起来.
    • 衍生的表达式适用于使用方形镜片的哈特曼传感器.
    • 结果与已建立的圆形光圈模型进行了比较.

    结论:

    • 由此衍生的表达式提供了一种实用方法,用于用方形光圈传感器量化光学流强度.
    • 这项工作将流测量技术的适用性扩展到使用方形子孔的系统.