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相关概念视频

Flame Photometry: Overview01:02

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Flame photometry, also known as flame emission spectrometry, is a technique used for the qualitative and quantitative analysis of elements present in a sample using a flame as the source of excitation energy. The concept of flame photometry was realized in the early 1860s by Kirchhoff and Bunsen, who discovered that specific elements emit characteristic radiation when excited in flames. The first instrument developed for this purpose was used to measure sodium (Na) in plant ash using a Bunsen...
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In a flame photometer, when a solution like potassium chloride is aspirated into the flame, the solvent evaporates, leaving behind dehydrated salt. This salt dissociates into free gaseous atoms in their ground state. Some of these atoms absorb energy from the flame, leading to their excitation. The excited atoms return to the ground state, emitting photons at characteristic wavelengths. Because only electronic transitions are involved, the resulting emission lines are very narrow. The intensity...
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Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
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相关实验视频

Updated: Jul 5, 2025

Fluorescence Lifetime Macro Imager for Biomedical Applications
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基于64像素区域阵列传感器的火焰成像技术

Xiaodong Huang1, Xiaojian Hao1, Baowu Pan2

  • 1Science and Technology on Electronic Test and Measurement Laboratory, North University of China, Taiyuan 030051, China.

Micromachines
|January 23, 2024
PubMed
概括
此摘要是机器生成的。

这项研究引入了一种新的可调节二极管激光吸收光谱 (TDLAS) 成像方法,使用64像素的传感器创建详细的二维火焰温度图. 这种先进的技术克服了视线限制,改善了燃烧分析.

关键词:
艺术 艺术 艺术 艺术在TDLAS中.燃烧的火焰燃烧的火焰.两个维的成像成像.

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科学领域:

  • 燃烧诊断仪器的使用
  • 光学光谱学是指光学光谱学.
  • 热力学是一种热力学.

背景情况:

  • 高分辨率的火焰温度成像对于理解燃烧至关重要.
  • 可调节二极管激光吸收光谱 (TDLAS) 是一个关键的诊断工具.
  • 在TDLAS的视线 (LOS) 限制限制了燃烧场测量的数据维度和体积.

研究的目的:

  • 开发和演示用于重建二维火焰温度场的TDLAS成像方法.
  • 解决传统TDLAS在燃烧诊断中的局限性.
  • 为了提高TDLAS高精度,复杂的火焰温度测量的能力.

主要方法:

  • 使用64像素区域阵列传感器进行TDLAS成像.
  • 采用了代数重建技术 (ART) 算法来重建温度场.
  • 通过数值模拟验证了ART算法的稳定性.
  • 使用HITRAN数据库调查了温度,度和压力对第二波强度的影响.

主要成果:

  • 成功重建了一个火焰的二维温度场.
  • 与热电偶测量相对验证了重建准确性,达到3.71%的最大相对误差.
  • 在基于TDLAS的火焰成像中证明了ART算法的有效性.

结论:

  • 开发的具有64像素传感器的TDLAS成像系统可实现高精度的2D火焰温度测量.
  • 这种方法克服了与 LOS TDLAS 相关的先前数据限制.
  • 这些发现为先进的燃烧诊断技术铺平了道路.