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相关概念视频

UV–Vis Spectrometers01:14

UV–Vis Spectrometers

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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.
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IR Spectrometers01:25

IR Spectrometers

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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...
1.1K
Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

195
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....
195
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

343
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.
343
Spectrophotometry: Introduction01:16

Spectrophotometry: Introduction

3.0K
Spectrophotometry is the quantitative measurement of the absorption, reflection, diffraction, or transmission of electromagnetic radiation through a material as a function of the intensity and wavelength of the radiation. A spectrophotometer is a device used to measure the change in the radiation intensity caused by its interaction with the material.
The essential components of a spectrophotometer include a source of electromagnetic radiation, a slot for placing a material to be analyzed, and a...
3.0K
Atomic Absorption Spectroscopy: Instrumentation01:22

Atomic Absorption Spectroscopy: Instrumentation

576
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.
The atomizer used in AAS can be either a flame atomizer or an...
576

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微型计算光谱仪的进展

Qian Xue1, Yang Yang1, Wenkai Ma1

  • 1School of Integrated Circuits, Huazhong University of Science and Technology (HUST), Wuhan, 430074, P. R. China.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|October 30, 2024
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概括

微型计算光谱仪利用计算能力来克服尺寸和性能限制. 这篇评论详细介绍了光谱编码和重建算法,这对于推进这些紧型设备至关重要.

关键词:
压力传感器 压力传感器微型化的计算光谱仪.重建算法重建的算法编码的光谱编码.

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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.
  • 计算成像技术的成像

背景情况:

  • 传统的光谱仪面临着尺寸和性能之间的权衡.
  • 微型计算光谱仪集成计算资源,以提高紧型设备的性能.
  • 这些光谱仪利用各种材料,光学结构和光探测器,加上重建算法.

研究的目的:

  • 提供对微型计算光谱仪的全面审查.
  • 专注于关键组件:光谱编码和重建算法.
  • 分析这些组件之间的相互作用,并概述未来的方向.

主要方法:

  • 概述了光谱编码策略 (空间调制,时间调制,光源) 的原理,特征和进展.
  • 基于数学模型进行分类和分析的重建算法 (传统和深度学习).
  • 检查了编码和重建之间的合作,优点数字和优化策略.

主要成果:

  • 详细审查光谱编码技术和重建算法.
  • 分析光谱编码和重建方法之间的协同作用.
  • 强调小型化计算光谱仪的性能指标和操作考虑因素.

结论:

  • 微型计算光谱仪为先进的光谱应用提供了一个有前途的途径.
  • 进一步的开发取决于优化光谱编码和重建算法的集成.
  • 潜在的应用包括高光谱成像和紧光谱学的未来创新.