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相关概念视频

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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Atomic Force Microscopy01:08

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Atomic force microscopy (AFM) is a type of scanning probe microscopy that can analyze topographic details of various specimens like ceramics, glass, polymers, and biological samples. AFM offers over 1000 times more resolution than the optical imaging system. Images generated from AFM are three-dimensional surface profiles, offering an advantage over the flat, two-dimensional images from other imaging techniques.
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相关实验视频

Updated: Jun 16, 2025

Characterization of Surface Modifications by White Light Interferometry: Applications in Ion Sputtering, Laser Ablation, and Tribology Experiments
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跨周期亚尼奎斯特采样方法用于高效的3D表面造型在低连贯性扫描干扰度.

Wei Liu, Yan Tang, Yuliang Long

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    此摘要是机器生成的。

    一种新的跨周期亚尼奎斯特采样方法提高了低相干扫描干扰测量 (LCSI) 的效率. 这种技术可以实现更高的精度和更好的粗度测量,采样间隔比尼奎斯特极限大得多.

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    相关实验视频

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    科学领域:

    • 光学计量学 在光学计量学
    • 表面形测量仪表面形测量仪
    • 干涉测量是干涉测量的方法.

    背景情况:

    • 低相干扫描干扰测量 (LCSI) 是一种精确的3D表面造型测量技术.
    • 尼奎斯特采样标准通过规定一个小的采样间隔来限制LCSI测量效率.
    • 保持信号特征需要遵守严格的采样间隔,阻碍速度.

    研究的目的:

    • 为LCSI提出一种新的跨期亚尼奎斯特采样方法.
    • 为了提高测量效率而不会损害信号完整性.
    • 为了提高3D表面形状测量的精度和分辨率.

    主要方法:

    • 开发了一个跨时期的亚尼奎斯特采样策略.
    • 根据尼奎斯特步骤大小和整个波长周期定义了一个特定的采样间隔.
    • 保持了干涉测量信号的空间和频率信息.

    主要成果:

    • 获得了比尼奎斯特极限大25倍的采样间隔.
    • 与随机分样采样相比,测量准确度提高了90%以上.
    • 改善了从0.9259μm到0.7003μm的表面粗度测量.

    结论:

    • 拟议的方法显著增加了LCSI采样间隔.
    • 这种技术保留了基本的信号特征,空间和频率信息.
    • 跨周期亚尼奎斯特采样为3D表面造型测量提供了更有效,更准确的方法.