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相关概念视频

Tandem Mass Spectrometry01:21

Tandem Mass Spectrometry

1.2K
Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and signal-to-noise ratio for the analyte. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.
Secondary fragmentations occur in the interaction cell and can be induced by various factors. Fragmentation induced by collision with inert gases, such as N2, Ar, He, etc., is called collision-induced...
1.2K
IR Spectrometers01:25

IR Spectrometers

1.5K
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...
1.5K
Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

296
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....
296
UV–Vis Spectrometers01:14

UV–Vis Spectrometers

1.5K
The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell.
1.5K
Mass Spectrometers01:16

Mass Spectrometers

5.9K
This lesson details the instrumentation of a mass spectrometer—a physical instrument to perform mass spectrometry on analyte molecules and record the characteristic mass spectra. This is achieved via three chief functions:
5.9K
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

594
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.
594

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相关实验视频

Updated: Sep 11, 2025

High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis
07:55

High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis

Published on: September 22, 2017

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旋转多结构光谱仪的设计方法

Yiming Wang, Yu Huang, Xi Wang

    Optics express
    |August 13, 2025
    PubMed
    概括

    一种新的旋转多结构光谱仪设计使得在广泛的900-2400纳米范围内实现快速,高分辨率的光谱测量. 这一创新克服了传统光纤光谱仪的局限性,为各种应用提供了更好的性能.

    科学领域:

    • 频谱学是一种光谱学.
    • 光学工程是指光学工程.
    • 仪器科学 仪器科学

    背景情况:

    • 传统的光纤光谱仪由于固定的探测器尺寸而面临光谱范围和分辨率的限制.
    • 现有的设计往往涉及到光谱范围和分辨率之间的权衡,阻碍了性能.
    • 频谱技术的进步需要改进的光谱仪设计,用于广泛的应用.

    研究的目的:

    • 为旋转多结构光谱仪提出设计方法.
    • 为了在广泛的光谱范围内实现快速,高分辨率的光谱测量.
    • 为了克服传统光纤光谱仪的性能限制.

    主要方法:

    • 提出了一个旋转的多结构光谱仪设计,利用相对旋转的聚合和收集镜片组.
    • 该光谱仪是使用Zemax设计的,用于900-2400纳米范围,数值孔径为0.3.3.
    • 染色偏差校正理论被应用来消除带间的染色偏差.

    主要成果:

    • 设计的光谱仪实现了0.42-0.72nm的光谱分辨率.
    • 根平均平方 (RMS) 点图小于8.5μm,调制转移函数 (MTF) 在20 lp/mm时超过0.65.
    • 在收集组中使用球形镜头可以降低成本和组装复杂性.

    更多相关视频

    High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis
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    High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis

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    A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks
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    A Technical Guide for Performing Spectroscopic Measurements on Metal-Organic Frameworks

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    Last Updated: Sep 11, 2025

    High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis
    07:55

    High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis

    Published on: September 22, 2017

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    High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis
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    High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis

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    结论:

    • 拟议的设计方法能够在广泛的光谱范围内进行快速,高分辨率的光谱测量.
    • 旋转的多结构光谱仪有效地纠正轴向色谱偏差.
    • 这种设计为开发具有大量数值孔径和广泛光谱范围的先进光纤光谱仪提供了宝贵的参考.