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Modified FIR thermometry for surface temperature sensing by using high power laser.

Ran Wang, Xinlu Zhang, Zhilin Zhang

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    Summary

    The fluorescence intensity ratio (FIR) technique offers sensitive optical thermometry. This study introduces a modified FIR calibration to improve accuracy by accounting for light-induced heating effects in surface temperature sensing.

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    Area of Science:

    • Optical thermometry
    • Materials science
    • Heat transfer

    Background:

    • The fluorescence intensity ratio (FIR) technique is a sensitive optical thermometry method with high spatial resolution.
    • A key limitation of FIR thermometry is potential temperature overestimation due to light-induced heating effects, impacting accuracy.
    • Accurate surface temperature sensing is crucial for various high-precision applications.

    Purpose of the Study:

    • To develop a modified calibration expression for the FIR technique to enhance accuracy in surface temperature sensing.
    • To address and mitigate the overestimation of temperature caused by incident light heating.
    • To improve the reliability of FIR thermometry for demanding applications.

    Main Methods:

    • Utilized COMSOL software to calculate the temperature distribution on the surface.
    • Developed a modified calibration expression for the FIR technique based on the calculated temperature distribution.
    • Validated the modified FIR method using experimental data.

    Main Results:

    • The modified calibration expression effectively accounts for temperature distribution.
    • Experimental verification confirmed the improved accuracy of the modified FIR technique.
    • The study demonstrates a method to overcome light-induced heating errors in FIR thermometry.

    Conclusions:

    • The modified FIR calibration expression enhances the accuracy and reliability of surface temperature sensing.
    • This approach successfully mitigates temperature overestimations caused by incident light.
    • The findings contribute to the advancement of precise optical thermometry techniques.