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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: Instrumentation01:22

Atomic Absorption Spectroscopy: Instrumentation

An atomic absorption spectrophotometer (AAS) comprises several components: a radiation source, an atomizer, a monochromator, and a detector. The radiation source can be a hollow-cathode lamp (HCL) or an electrodeless-discharge lamp (EDL), both of which provide a narrow emission line of the required wavelength. However, some instruments use continuum sources and high-resolution monochromators to achieve a narrow range of radiation.
The atomizer used in AAS can be either a flame atomizer or an...
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...
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...
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...

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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

An improved double-beam infrared microspectrometer.

E M Bradbury1, M A Ford

  • 1Department of Physics, College of Technology, Portsmouth, England.

Applied Optics
|January 6, 2010
PubMed
Summary
This summary is machine-generated.

This study details converting single-beam monochromators into stable double-beam microspectrometers. The new design offers improved electronic stability, simplicity, and mains frequency interference elimination for microsample analysis.

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High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis
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Published on: December 22, 2015

Area of Science:

  • Spectroscopy
  • Analytical Chemistry
  • Biophysics

Background:

  • Microspectroscopy requires stable, high-performance instrumentation.
  • Existing systems may suffer from electronic instability and mains frequency interference.
  • Analysis of small samples like fibers and crystals demands specialized techniques.

Purpose of the Study:

  • To describe the conversion of single-beam monochromators into double-beam microspectrometers.
  • To highlight the advantages of the new microspectrometer design.
  • To present a versatile tool for analyzing small and oriented samples.

Main Methods:

  • Modification of single-beam monochromators.
  • Integration of electronic components for double-beam operation.
  • Utilization of a polarizer for specific sample analysis.

Main Results:

  • Achieved significant improvement in long-term electronic stability.
  • Demonstrated simplicity and compactness of the microspectrometer system.
  • Eliminated beats due to mains frequency pickup.

Conclusions:

  • The developed double-beam microspectrometer offers superior performance for analyzing small samples.
  • This system is ideal for examining fibers, small crystals, and biological macromolecules.
  • The design provides a robust and interference-free solution for microspectroscopic applications.