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IR Spectrometers01:25

IR Spectrometers

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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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Infrared (IR) Spectroscopy: Overview01:09

Infrared (IR) Spectroscopy: Overview

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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...
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Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview01:13

Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview

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Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
The ATR process begins by directing a beam...
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Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

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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....
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Related Experiment Video

Updated: Jul 12, 2025

An Intra-Tissue Radiometry Microprobe for Measuring Radiance In Situ in Living Tissue
09:10

An Intra-Tissue Radiometry Microprobe for Measuring Radiance In Situ in Living Tissue

Published on: June 2, 2023

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In-Situ Pixel-wise Emissivity Measurement Using a Multispectral Infrared Camera.

Corentin Poissenot-Arrigoni1, Bertrand Marcon1, Frédéric Rossi1

  • 1Arts et Métiers Institute of Technology, LaBoMaP, UBFC, HESAM, F-71250 Cluny, France.

Journal of Imaging
|October 27, 2023
PubMed
Summary
This summary is machine-generated.

Accurate thermography requires precise emissivity determination. This study introduces a novel method using multispectral infrared cameras for direct, pixel-wise emissivity measurement during acquisition, eliminating costly traditional approaches.

Keywords:
emissivityinfrared thermographymultispectral camerapixel-wise

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Area of Science:

  • Thermography and thermal imaging
  • Material science and surface properties

Background:

  • Accurate temperature measurement in thermography relies heavily on precise emissivity values.
  • Traditional emissivity measurement methods are often time-consuming, expensive, and incompatible with real-time infrared image acquisition.

Purpose of the Study:

  • To develop a novel method for determining pixel-wise emissivity.
  • To enable simultaneous emissivity measurement during infrared camera acquisition.
  • To eliminate the need for additional materials and experiments in emissivity assessment.

Main Methods:

  • Utilizing data from a multispectral infrared camera.
  • Developing algorithms to process multispectral data for emissivity calculation.
  • Implementing a pixel-wise emissivity determination technique.

Main Results:

  • Successful pixel-wise emissivity mapping was achieved.
  • The method allows for direct emissivity measurement concurrently with infrared image capture.
  • Elimination of the requirement for external calibration materials or separate experimental setups.

Conclusions:

  • The presented method offers a significant advancement in thermography by enabling efficient and accurate emissivity determination.
  • This technique simplifies the process of obtaining precise temperature measurements in various applications.
  • The approach facilitates real-time emissivity assessment, enhancing the practicality of infrared thermography.