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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...
Thermosensation01:43

Thermosensation

Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...

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Related Experiment Video

Updated: Jun 11, 2026

High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings
09:01

High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings

Published on: April 16, 2017

Multispectral light-field thermometry system for high-temperature surfaces under intense background interference.

Shuyue Lai, Chunhui Yao, Shan Gao

    Applied Optics
    |June 10, 2026
    PubMed
    Summary
    This summary is machine-generated.

    Accurate temperature measurement in high-heat environments like jet engines is now possible. A new multispectral light-field thermometry method corrects for background radiation and reflections, improving thermal diagnostics.

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    Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography
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    Last Updated: Jun 11, 2026

    High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings
    09:01

    High-resolution Thermal Micro-imaging Using Europium Chelate Luminescent Coatings

    Published on: April 16, 2017

    Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography
    11:34

    Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography

    Published on: May 15, 2017

    Area of Science:

    • Thermodynamics
    • Optical Engineering
    • Combustion Science

    Background:

    • Accurate temperature assessment is vital for thermal diagnostics in aero-engines and gas turbines.
    • Intense ambient radiation and reflections pose significant challenges to temperature measurement in combustion environments.

    Purpose of the Study:

    • To develop a robust thermometry framework for accurate temperature assessment in complex combustion environments.
    • To mitigate radiative interference and reflection artifacts in high-temperature measurements.

    Main Methods:

    • Development of a background-corrected multispectral light-field (MSLF) thermometry framework.
    • Integration of single-snapshot 4D acquisition with an emissivity-adaptive model.
    • Implementation of a dual strategy involving background correction and selection of discrete narrowband wavelengths (700-850 nm).

    Main Results:

    • Reflection-induced errors were reduced to within 6.5 K in a heating furnace.
    • Absolute temperature deviations were limited to within 20 K across a wide emissivity range (0.2-0.9) in jet-flame impingement tests.
    • The MSLF framework demonstrated robust performance in high-temperature environments.

    Conclusions:

    • The developed MSLF thermometry framework effectively addresses challenges of intense radiation and reflections.
    • The system provides accurate and reliable temperature measurements in complex combustion environments.
    • This advancement is crucial for improving thermal diagnostics in critical applications like aero-engines and gas turbines.