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Related Concept Videos

IR Spectrometers01:25

IR Spectrometers

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...
Atomic Absorption Spectroscopy: Interference01:25

Atomic Absorption Spectroscopy: Interference

Interference leads to systematic error in atomic absorption (AA) measurements by enhancing or diminishing the analytical signal or the background. These interferences can be grouped into three main categories: spectral interference, chemical interference, and physical interference.
Spectral interference occurs when signals from other elements or molecules overlap with the analyte signal, falsely elevating or masking the analyte's absorbance. This interference can be corrected using Zeeman,...
Atomic Emission Spectroscopy: Interference01:30

Atomic Emission Spectroscopy: Interference

In atomic emission spectroscopy (AES), high-temperature atomizers excite a broad range of elements and molecules that generate complex emissions from sources such as oxides, hydroxides, and flame combustion products in the flame or plasma. Several strategies can be employed to minimize spectral interferences caused by overlapping emission lines or bands. These include increasing instrument resolution, choosing alternative emission lines, optimally placing the detector in low-background regions,...
Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

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...
Inductively Coupled Plasma-Mass Spectrometry (ICP-MS): Interferences01:20

Inductively Coupled Plasma-Mass Spectrometry (ICP-MS): Interferences

Inductively coupled plasma–mass spectrometry (ICP–MS) is a highly selective and sensitive technique for accurate elemental analysis. Though the analysis of ICP–MS mass spectra is comparatively straightforward, it is affected by spectroscopic and non-spectroscopic interferences. Spectroscopic interferences arise when the plasma contains ionic species with an m/z value the same as the analyte ion. Spectroscopic interference can be categorized as isobaric, polyatomic ions, and refractory oxide ion...
Interference and Diffraction02:18

Interference and Diffraction

Interference is a characteristic phenomenon exhibited by waves. When two electromagnetic waves interact with their peaks and troughs coinciding, a resulting wave with enhanced amplitude is produced. This is known as constructive interference. In this case, the two waves interacting are in phase with each other.

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Related Experiment Video

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Proton Transfer and Protein Conformation Dynamics in Photosensitive Proteins by Time-resolved Step-scan Fourier-transform Infrared Spectroscopy
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[Data processing for interferogram of spatial heterodyne spectrometer].

Song Ye1, Wei Xiong, Yan-Li Qiao

  • 1Institute of Digital Technology, AISINO Corporation, Beijing 100097, China. yesongmail@sina.com

Guang Pu Xue Yu Guang Pu Fen Xi = Guang Pu
|May 22, 2009
PubMed
Summary
This summary is machine-generated.

Spatial heterodyne spectroscopy (SHS) offers high spectral resolution. This study details a data processing method to enhance SHS spectral inversion accuracy using baseline correction and phase correction techniques.

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Area of Science:

  • Spectroscopy
  • Optical Engineering
  • Signal Processing

Context:

  • Spatial heterodyne spectroscopy (SHS) is an emerging technique for high-resolution spectral analysis.
  • Traditional spectroscopic methods face limitations in achieving desired resolution and efficiency.
  • Interferogram data processing is crucial for accurate spectral retrieval in SHS.

Purpose:

  • To describe the fundamental principles of spatial heterodyne spectrometers.
  • To present a novel data processing methodology tailored for SHS interferograms.
  • To improve the spectral inversion accuracy of SHS systems.

Summary:

  • The study outlines the basic concepts of spatial heterodyne spectrometers.
  • A data processing method is introduced, including baseline elimination via first-order differencing and apodization using a triangular function.
  • Phase correction for Fourier transform spectra and wavelength calibration using sodium and mercury lines are detailed.

Impact:

  • The presented data processing method effectively enhances the spectral inversion accuracy of spatial heterodyne spectrometers.
  • This work contributes to the advancement of high-resolution spectroscopic techniques.
  • Improved accuracy in SHS can benefit various scientific fields requiring precise spectral measurements.