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相关概念视频

Total Internal Reflection Fluorescence Microscopy01:05

Total Internal Reflection Fluorescence Microscopy

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Total internal reflection fluorescence microscopy or TIRF is an advanced microscopic technique used to visualize fluorophores in samples close to a solid surface with a higher refractive index, such as a glass coverslip. TIRF only allows fluorophores in proximity to the solid surface to be excited. When light from a medium with a lower refractive index (such as air) hits the glass coverslip at a critical angle, the light undergoes total internal reflection stead of passing through the glass.
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Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview01:13

Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview

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Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
The ATR process begins by directing a beam...
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Updated: May 14, 2025

Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
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基于太赫兹反射成像的成像技术和量化检测法研究的内部空隙缺陷,基于太赫兹反射成像.

Jun Hu, Wennan Liu, Fengyun Xie

    Optics express
    |April 12, 2025
    PubMed
    概括

    这项研究引入了一种先进的太赫兹时域光谱系统,用于检测黑色的空洞缺陷. 优化的系统使用集成算法实现高精度成像和量化.

    科学领域:

    • 材料科学 材料科学 材料科学
    • 非破坏性测试 不破坏性测试
    • 频谱学是一种光谱学方法.

    背景情况:

    • 的空隙缺陷可能会损害材料的完整性和性能.
    • 传统的缺陷检测方法可能缺乏精度或效率,对于复杂的材料,如黑色膠.
    • 太赫兹时域光谱 (THz-TDS) 由于其独特的材料透度和灵敏度,为非破坏性评估提供了潜力.

    研究的目的:

    • 使用THz-TDS开发和验证一种高效,高精度的缺陷表征系统,用于黑色的空隙缺陷.
    • 优化和整合先进的算法,用于增强的太赫兹图像重建和光谱分析.
    • 为了实现真空缺陷的精确成像,量化和3D可视化.

    主要方法:

    • 反射模式特拉赫兹时域光谱 (THz-TDS) 的应用.
    • 集成和优化功率光谱密度 (PSD) 集成成像,同态过,以及缺陷特征的Otsu方法.
    • 为光谱分析开发一种结合波纹消噪和时间域光谱学的方法.
    • 使用飞行时间公式进行定量缺陷分析.
    • 引入对标操作,以 denoised 时间域光谱曲线与最大强度投影相结合,用于3D成像.

    主要成果:

    • 确定了一个优化的算法组合 (PSD集成成像,同型过,Otsu方法),实现精确的缺陷成像和量化.

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  • 拟议的光谱分析方法有效地拒绝信号,并使用飞行时间进行定量缺陷分析.
  • 虚空缺陷的3D可视化通过光谱曲线对齐和最大强度投影成功实现.

    • 结论:

    • 开发的基于THz-TDS的系统与集成的算法提供了一个高效和高精度的方法来表征黑色的空缺缺陷.
    • 该研究表明,将多个信号处理和成像算法结合起来,可以获得更好的缺陷检测和分析的协同效益.
    • 这种方法为材料的非破坏性评估和质量控制提供了一个强大的解决方案.