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相关概念视频

Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

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A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
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Raman Spectroscopy: Overview01:20

Raman Spectroscopy: Overview

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The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
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Updated: Jul 9, 2025

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时间域扩散拉曼光谱法使用单个像素检测.

Alessandro Bossi1,2, Sanathana Konugolu Venkata Sekar3, Michele Lacerenza1,4

  • 1Politecnico di Milano, Department of Physics, Milan, Italy.

Biomedical optics express
|November 29, 2023
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概括
此摘要是机器生成的。

这项研究引入了使用单像素探测器和数字微镜装置的时间域扩散拉曼光谱法 (TD-DIRS),用于成本效益高,对厚生物组织进行深入化学分析.

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科学领域:

  • 生物光子学 生物光子学
  • 频谱学是一种光谱学.
  • 化学成像技术 化学成像技术

背景情况:

  • 扩散拉曼光谱法 (DIRS) 能够对厚厚的生物组织进行化学分析.
  • 现有的DIRS方法往往涉及复杂而昂贵的检测系统.
  • 对生物组织进行深度分析仍然是一个挑战.

研究的目的:

  • 开发一种新的,具有成本效益的时间域扩散拉曼光谱 (TD-DIRS) 系统.
  • 为了能够对厚厚的生物组织进行深入的化学分析.
  • 为了克服当前DIRS检测技术的局限性.

主要方法:

  • 使用单像素探测器和数字微镜装置 (DMD) 在成像光谱仪中进行波长编码.
  • 使用光子的飞行时间分布,用于深度探测拉曼信号.
  • 用双层幻象 (组织-骨模仿和生物组织-碳酸) 验证了该系统.

主要成果:

  • 成功地将拉曼信号与层层的幻影材料区分开来.
  • 从幻影中的单个层重建了拉曼光谱.
  • 从生物组织幻影中检索拉曼峰的证明,尽管自光.

结论:

  • 新的TD-DIRS设置为深度拉曼光谱学提供了具有成本效益和高性能的解决方案.
  • 该系统为扩散媒体中改进和定量材料分析提供了潜力.
  • 这种方法提升了对生物组织的非侵入性化学研究的能力.