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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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相关实验视频

Updated: Jul 16, 2025

Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography
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Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography

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通过光学窗口成像系统的误差,使用不均的激光加热.

Stuart A Jackson, Raymond M Sova

    Applied optics
    |September 14, 2023
    PubMed
    概括

    恶劣的环境会因为热膨胀而降低光学窗的性能. 这项研究使用激光加热的实验设置量化这些异常,将结果与理论模型进行比较.

    科学领域:

    • 光学工程的光学工程.
    • 材料科学是一种材料科学.
    • 热分析是一种热分析.

    背景情况:

    • 光学窗户对于在苛刻条件下运行的成像系统至关重要.
    • 不均的加热导致温度梯度,导致折射率变化和机械应力.
    • 这些热效应会降低成像性能.

    研究的目的:

    • 通过实验来描述光学窗户中热梯度引起的光学偏差.
    • 为了验证预测热诱导偏差的第一原则模型.

    主要方法:

    • 开发了一种使用二氧化碳激光对蓝宝石光学窗户进行受控加热的实验装置.
    • 使用红外摄像头测量表面温度分布.
    • 利用可见成像系统和波面传感器来量化光束退化.

    主要成果:

    • 蓝宝石样本被加热到500K以上,温度梯度超过15K/mm.
    • 实验测量显示,与窗户温度模型的定量一致.
    • 在测量和建模的波面扭曲和图像质量之间观察到质量一致.

    结论:

    • 实验设置有效地描述了光学窗户中的热偏差.

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  • 第一原则模型为预测在热应力下窗户性能提供了可靠的基础.
  • 了解这些影响对于设计适用于恶劣环境的强大的成像系统至关重要.