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Spectrophotometry is the quantitative measurement of the absorption, reflection, diffraction, or transmission of electromagnetic radiation through a material as a function of the intensity and wavelength of the radiation. A spectrophotometer is a device used to measure the change in the radiation intensity caused by its interaction with the material.
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Applications of IR Spectroscopy: Overview01:11

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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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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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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.
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A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
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Diffuse Optical Spectroscopy: Technology and Applications: introduction to the feature issue.

Thomas D O'Sullivan1, Hamid Dehghani2, Rebecca Re3,4

  • 1Department of Electrical Engineering, University of Notre Dame, Notre Dame, IN 46556, USA.

Biomedical Optics Express
|November 18, 2024
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Summary
This summary is machine-generated.

This 2024 feature issue showcases diffuse optical spectroscopy (DOS) technologies and applications. It covers fundamental science, system development, and biomedical uses in 27 research papers and a review.

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Area of Science:

  • Multidisciplinary research at the intersection of optics, engineering, and medicine.
  • Focus on diffuse optical spectroscopy (DOS) for biomedical applications.

Background:

  • Diffuse Optical Spectroscopy (DOS) is a rapidly advancing field.
  • There is a need to consolidate recent technological developments and applications.

Purpose of the Study:

  • To present a comprehensive overview of current diffuse optical spectroscopy (DOS) technologies.
  • To highlight diverse biomedical applications of DOS.
  • To showcase emerging trends and established techniques in the field.

Main Methods:

  • Compilation of 27 contributed research papers.
  • Inclusion of 1 invited review article.
  • Covers a broad spectrum from basic theory to clinical applications.

Main Results:

  • Exemplary sample of established and emerging DOS technologies.
  • Demonstrates a wide range of biomedical applications.
  • Includes advancements in light-tissue interaction theory, computational modeling, and system development.

Conclusions:

  • The feature issue provides a valuable snapshot of the state-of-the-art in diffuse optical spectroscopy (DOS).
  • It underscores the multidisciplinary nature and broad applicability of DOS in biomedical research and clinical practice.