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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...
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.
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...
UV–Vis Spectrometers01:14

UV–Vis Spectrometers

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. Samples for...
IR Spectroscopy: Molecular Vibration Overview01:24

IR Spectroscopy: Molecular Vibration Overview

When Infrared (IR) radiation passes through a covalently bonded molecule, the bonds transition from lower to higher vibrational levels. The fundamental vibrational motions that result in infrared absorption can be classified as stretching or bending vibrations.
Stretching vibrations are vibrational motions that occur along the bond line, changing the bond length or distance between two bonded atoms. They are further distinguished as symmetric or asymmetric. In symmetric stretching, the...
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,...

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High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis
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High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis

Published on: December 22, 2015

Phase grid-type interferential spectrometer for the near infrared.

R Prat1, C Benoit a la Guillaume, G Bisson

  • 1Universite de Paris VII, Groupe de Physique des Solides de l'Ecole Normale Superieure, 2 place Jussieu, 75221 Paris Cedex 05, France.

Applied Optics
|November 15, 1983
PubMed
Summary
This summary is machine-generated.

A new phase grid spectrometer analyzes weak light sources between 1-2 micrometers. This instrument offers a resolving power of 30,000 for detailed spectral studies.

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Area of Science:

  • Astrophysics and Optical Instrumentation

Background:

  • Studying weak extended sources requires advanced spectroscopic techniques.
  • The 1-2 micrometer wavelength region is crucial for observing specific celestial phenomena.

Purpose of the Study:

  • To develop and describe a novel phase grid-type interferential spectrometer.
  • To evaluate its performance for analyzing weak extended sources in the 1-2 micrometer range.

Main Methods:

  • Design and construction of a phase grid-type interferential spectrometer.
  • Utilizing a phase grid to decode Fourier interferograms from a plane-wave interferometer.
  • Experimental validation of the spectrometer's capabilities.

Main Results:

  • The spectrometer achieves a resolving power of approximately 30,000.
  • Demonstration of its effectiveness in obtaining spectra from weak extended sources.
  • Comparison with existing interferential spectrometer designs.

Conclusions:

  • The phase grid-type interferential spectrometer is a viable tool for 1-2 micrometer spectroscopy.
  • It offers competitive performance for studying faint astronomical objects.
  • Further experimental results confirm its potential for astrophysical research.