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Related Concept Videos

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

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.
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 Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

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.
Infrared (IR) Spectroscopy: Overview01:09

Infrared (IR) Spectroscopy: Overview

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.
Different compounds display unique properties due to their...
Applications of IR Spectroscopy: Overview01:11

Applications of IR Spectroscopy: Overview

The non-destructive nature and ability to provide valuable chemical information make IR spectroscopy a versatile technique with broad applications in various scientific and industrial fields. IR spectroscopy is commonly used to identify and characterize organic and inorganic compounds. It provides information about the functional groups present in a molecule and the bonding between atoms. This helps in the structural elucidation of compounds during organic synthesis, pharmaceutical research,...
UV–Vis Spectroscopy of Conjugated Systems01:32

UV–Vis Spectroscopy of Conjugated Systems

Organic compounds with conjugated double bonds show strong absorption features in the UV–visible region of the electromagnetic spectrum attributed to π → π* electronic excitations. Generally, a UV–vis absorption spectrum is recorded as a plot of absorbance vs wavelength. The wavelength of maximum absorbance, which manifests as a peak in the absorption spectrum, is denoted as λmax.
One of the factors influencing λmax is the extent of conjugation in the...

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High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis
13:31

High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis

Published on: December 22, 2015

Compact imaging spectrograph for broadband spectral simultaneity.

M R Torr, D G Torr

    Applied Optics
    |November 12, 2010
    PubMed
    Summary
    This summary is machine-generated.

    We developed a compact, portable spectrograph for imaging broad wavelength ranges simultaneously. This electronic spectrograph design offers moderate spectral resolution and is suitable for detecting faint airglow signals.

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

    • Optical Engineering
    • Spectroscopy
    • Instrumentation Science

    Background:

    • Development of advanced spectrographs is crucial for various scientific applications.
    • Previous instruments often had limitations in wavelength coverage or portability.

    Purpose of the Study:

    • To design and evaluate a novel, compact spectrograph.
    • To assess the utility of developmental components for future spectrograph designs.

    Main Methods:

    • Designed a spectrograph with a broad instantaneous wavelength range (3700-11,700 Å).
    • Utilized a matrix of four diffraction gratings and a custom photocathode system with a single image intensifier.
    • Employed an intensified-CCD focal-plane detector for spectral imaging.

    Main Results:

    • Achieved a theoretical spectral resolution of 12-20 Å, adjustable with wavelength coverage.
    • The instrument is moderately fast (f/6) and suitable for weak airglow signals.
    • The prototype is portable, weighing 15 kg with dimensions of 37 cm × 37 cm × 48 cm.

    Conclusions:

    • The developed spectrograph is a viable stepping stone for future electronic spectrograph evolution.
    • Identified advantages and weaknesses of the design, with suggestions for improvements.
    • The instrument's design demonstrates potential for broad wavelength imaging and portability.