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相关概念视频

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

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Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used....
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There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
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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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Atomic Absorption Spectroscopy: Instrumentation01:22

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An atomic absorption spectrophotometer (AAS) comprises several components: a radiation source, an atomizer, a monochromator, and a detector. The radiation source can be a hollow-cathode lamp (HCL) or an electrodeless-discharge lamp (EDL), both of which provide a narrow emission line of the required wavelength. However, some instruments use continuum sources and high-resolution monochromators to achieve a narrow range of radiation.
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Mass Analyzers: Overview01:13

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The mass analyzer is a crucial component of the mass spectrometer. In the ionization chamber, the vaporized sample is bombarded with a high-energy electron beam to generate a radical cation and further fragment into neutral molecules, radicals, and cations. A series of negatively charged accelerator plates accelerate the cations into the mass analyzer. The mass analyzer separates ions according to their mass-to-charge (m/z) ratios and then directs them to the detector. The common types of mass...
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Atomic Emission Spectroscopy: Instrumentation01:22

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The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
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具有多共振腔的基准测试重建光谱仪.

Chunhui Yao1, Kangning Xu2, Tianhua Lin2

  • 1Centre for Photonic Systems, Electrical Engineering Division, Department of Engineering, University of Cambridge, Cambridge CB3 0FA, U.K.

ACS photonics
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概括
此摘要是机器生成的。

本研究介绍了使用多共振腔的重建性光谱仪 (RS) 的新设计,以改善光谱信息获取. 这种新的方法将压力传感 (CS) 的一个关键参数最小化,实现了创纪录的光谱像素与通道比率 (SPCR).

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科学领域:

  • 光学和光子学 在光学和光子学.
  • 频谱学是一种光谱学.
  • 压缩传感器 压缩传感器

背景情况:

  • 微型重建光谱仪 (RSs) 在带宽/分辨率,传感速度和功率效率方面面临挑战.
  • 现有的RS设计往往由于采样通道对比不充分而导致光谱像素对通道比率 (SPCR) 较差.
  • 缺乏指导方针来优化RS采样响应以有效获取光谱信息.

研究的目的:

  • 从压力传感 (CS) 理论引入一个基本参数,即平均相互相关系数 (ν),作为RS设计的关键基准.
  • 提出一种使用多共振腔的新型RS设计,以优化采样矩阵并最大限度地减少v.
  • 在RS设备中展示改进的SPCR和光谱采集能力.

主要方法:

  • 提出了一种新的重建光谱仪 (RS) 设计,采用带有部分反射接口的多共振腔.
  • 使用压力传感 (CS) 理论中的平均相互相关系数 (ν) 作为设计基准.
  • 在化 (SiN) 平台上实现了单拍,双频段的RS,并使用多层涂层证明了对其他光子平台的适应性.

主要成果:

  • 通过优化的多孔配置实现了最小化的平均相互相关系数 (ν).
  • 通过双频段RS (270nm带宽,<0.5nm分辨率,15个频道/频段) 实现了创纪录的高光谱像素对频道比 (SPCR) 18.0.
  • 展示了使用多层涂层的超宽带RS的潜力,带宽为700nm,SPCR>100.

结论:

  • 拟议的多孔设计有效地优化了可重建光谱仪 (RSs) 的采样矩阵.
  • 这种方法显著提高了光谱像素与频道比率 (SPCR),克服了以前设计的局限性.
  • 该设计具有多功能性,可适应各种光子平台,可在光谱学中实现更广泛的应用.