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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

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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.
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相关实验视频

Updated: Feb 28, 2026

Characterization of Surface Modifications by White Light Interferometry: Applications in Ion Sputtering, Laser Ablation, and Tribology Experiments
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照明传感器用于技术表面的基于反射的特性.

Tim Sliti1, Nils F Melchert1, Philipp Middendorf1

  • 1Institute of Measurement and Automatic Control, Stiftung Gottfried Wilhelm Leibniz Universität Hannover, An der Universität 1, D-30823 Garbsen, Germany.

Sensors (Basel, Switzerland)
|February 27, 2026
PubMed
概括

一个新的传感器通过光反射快速评估轮叶片表面状况,帮助维护和质量检查. 它在确定需要详细粗度分析的区域方面表现有前途,补充了传统方法.

关键词:
这就是BRDF.反射力 反射力是什么?粗性 粗性 粗性的表面测量测量表面测量

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科学领域:

  • 材料科学 材料科学 材料科学
  • 光学工程是指光学工程.
  • 航空航天工程 航空航天工程

背景情况:

  • 部件的功能和寿命在很大程度上取决于技术表面的状况.
  • 轮机叶片表面的粗程度显著影响航空发动机的性能.
  • 传统的粗度测量对于大面积评估来说是耗时的.

研究的目的:

  • 介绍基于LED和摄像头的照明传感器,用于快速,广泛地表征轮机叶片表面.
  • 研究来自传感器的反射率参数与传统的表面粗度参数之间的关系.
  • 评估传感器在维护,维修和大修 (MRO) 和质量保证 (QA) 背景下对表面状况分类的潜力.

主要方法:

  • 使用开发的传感器获取多种照明图像数据.
  • 每个像素安装一个异性双向反射分布函数 (BRDF) 模型以获得反射参数.
  • 使用共聚焦激光扫描显微镜作为参考数据,独立测量表面粗度参数 (Sa,Sq,Sz,Ssk,Sku).
  • 在具有对比表面条件的轮机叶片上,对BRDF参数和粗性特征之间的关系进行定性研究.

主要成果:

  • 在BRDF参数和基于高度的粗度参数 (Sa,Sq,Sz) 之间观察到较弱的相关性.
  • 在BRDF参数和表面分布参数 (Ssk,Sku) 之间发现了更明显的趋势.
  • 在方向BRDF参数和表面纹理方向之间发现了良好的质量一致.

结论:

  • 开发的照明传感器提供了一个互补的,基于反射率的方法来评估表面状况.
  • 传感器可以有效地突出需要更详细的粗度测量区域,帮助MRO和QA流程.
  • 未来的工作将涉及到对各种组件几何学的定量分析和应用.