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Related Concept Videos

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...
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UV–Vis Spectrometers01:14

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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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High-Resolution Mass Spectrometry (HRMS)01:15

High-Resolution Mass Spectrometry (HRMS)

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The resolution of a mass spectrometer depends on the efficiency of separating ions with different ion masses. The mass of an atom is approximated to the sum of the masses of protons and neutrons inside, considering the masses of protons and neutrons as equal. However, the masses of the proton (1.6726 × 10−24 g) and neutron (1.6749 × 10−24 g) are not truly equal. There is a minor error in the expression of atomic masses relative to the simplest atom of hydrogen. For...
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Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

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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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Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview01:02

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Ultraviolet–visible (UV–visible or UV–Vis) spectroscopy is an analytical technique that investigates the interaction between matter and UV–Vis light within the electromagnetic spectrum. This method is widely used for its versatility, simplicity, and relatively quick data acquisition, making it valuable for both qualitative and quantitative analysis. When UV–Vis radiation passes through a material,  molecules absorb light depending on the energy required for...
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Infrared (IR) Spectroscopy: Overview01:09

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When electromagnetic radiation passes through a material, atoms or molecules transition from a lower to a higher energy state by absorbing radiation corresponding to the energy difference between the two states. The absorption of infrared (IR) radiation causes transitions between vibrational energy levels in a molecule. Therefore, IR spectroscopy is a useful analytical tool for determining the molecular structure of molecules.
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High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis
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Compact ultrahigh resolution interferometric spectrometer.

Qinghua Yang

    Optics Express
    |November 6, 2019
    PubMed
    Summary

    This study introduces a compact spectrometer combining a Fabry-Perot interferometer (FPI) and a static stepped-mirror interferometer (SMI). This novel design achieves ultrahigh spectral resolution (>1,000,000) with reduced size and measurement time.

    Area of Science:

    • Spectroscopy
    • Optical Engineering
    • Interferometry

    Background:

    • Ultrahigh spectral resolution is crucial for various scientific applications.
    • Existing ultrahigh resolution spectrometers often suffer from large physical size and long measurement times.
    • Combining different interferometer types can enhance spectral measurement capabilities.

    Purpose of the Study:

    • To present a novel compact spectrometer design for ultrahigh spectral resolution measurements.
    • To demonstrate the advantages of the new design over existing technologies.
    • To validate the spectrometer's performance through numerical simulations.

    Main Methods:

    • A compact spectrometer was developed by integrating a Fabry-Perot interferometer (FPI) with a static stepped-mirror interferometer (SMI).

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  • The FPI scans through N steps, acquiring one spectrum from the SMI at each step.
  • The N acquired spectra are combined to form a single ultrahigh resolution spectrum.

    • Main Results:

    • The developed spectrometer achieves a resolving power exceeding 1,000,000 in the near-infrared, short-wave infrared, and mid-wave infrared regions.
    • The spectrometer is significantly smaller in physical size compared to Michelson-type interferometers.
    • Measurement time is substantially reduced compared to both Michelson-type interferometers and FPI-Michelson combinations, with improved stability.

    Conclusions:

    • The presented FPI-SMI spectrometer offers a unique and effective approach to achieving ultrahigh spectral resolution.
    • This compact and efficient design provides a significant advancement for spectral measurements in various infrared regions.
    • The spectrometer's small size, short measurement time, and high resolution make it suitable for a wide range of applications.