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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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Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

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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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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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NMR Spectrometers: Resolution and Error Correction01:14

NMR Spectrometers: Resolution and Error Correction

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When magnetic nuclei in a sample achieve resonance and undergo relaxation, the signal detected in NMR is an approximately exponential free induction decay. Fourier transform of an exponential decay yields a Lorentzian peak in the frequency domain. Lorentzian peaks in an NMR spectrum are defined by their amplitude, full width at half maximum, and position, where the peak width is governed by the spin-spin relaxation time alone. In real experiments, however, the applied magnetic field is rendered...
1.2K
Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

14.9K
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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Mass Analyzers: Overview01:13

Mass Analyzers: Overview

2.1K
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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A Multimodal Wide-Field Fourier-Transform Raman Microscope
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A Multimodal Wide-Field Fourier-Transform Raman Microscope

Published on: December 30, 2025

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[A novel spatial modulation Fourier transform spectrometer with adjustable spectral resolution].

Yu-Sheng Lian, Ning-Fang Liao, Hang Lü

    Guang Pu Xue Yu Guang Pu Fen Xi = Guang Pu
    |March 11, 2015
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a novel spatial modulation Fourier transform spectrometer with adjustable spectral resolution. This design enhances spectrometer performance and broadens application ranges by overcoming fixed resolution limitations.

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    High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis
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    Area of Science:

    • Optics and Photonics
    • Spectroscopy

    Context:

    • Classical Fourier transform spectrometers (FTS) are limited by fixed spectral resolution.
    • Adjusting spectral resolution can significantly improve data acquisition, processing, and storage efficiency.
    • Enhanced spectrometer performance and extended application ranges are desirable.

    Purpose:

    • To propose a novel spatial modulation Fourier transform spectrometer with adjustable spectral resolution.
    • To describe the working principle and interferometer design.
    • To analyze the optical path difference, lateral shear, and spectral resolution adjustment.

    Summary:

    • A new spatial modulation Fourier transform spectrometer (SMFTS) is presented, featuring adjustable spectral resolution.
    • Ray tracing and equivalent model analysis yield general expressions for optical path difference and lateral shear.
    • The principle of spectral resolution adjustment is analyzed, demonstrating the system's feasibility.

    Impact:

    • The proposed spectrometer offers adjustable spectral resolution, high stability, and ease of assembly.
    • This theoretical study provides a foundation for designing advanced spectrometers.
    • It aims to expand the application scope of Fourier transform spectroscopy.