Radiation temperature measurement method for semitransparent materials using one-channel infrared pyrometer

Area of Science:

• Materials Science
• Optical Engineering
• Thermodynamics

Background:

• Semitransparent zinc sulfide (ZnS) is crucial for infrared optics in long-wavelength instruments.
• Accurate temperature measurement of ZnS is vital for performance in demanding applications.
• Existing methods may lack precision for high-temperature semitransparent materials.

Purpose of the Study:

• To develop and validate a temperature measurement method for high-temperature ZnS using optical pyrometry.
• To optimize the spectral band for infrared pyrometry of ZnS plates.
• To enhance the accuracy and reliability of temperature measurements in ZnS optical components.

Main Methods:

• Utilized a theoretical model of radiation transfer in semitransparent plates.
• Performed numerical analyses of ZnS plate radiation properties.
• Optimized the spectral band based on radiation intensity and signal-to-noise ratio (SNR).
• Analyzed effective waveband emittance for 1D ZnS plates under various conditions.

Main Results:

• An optimized spectral band was determined for one-channel optical pyrometry of ZnS.
• The study identified optimal conditions balancing measurement intensity and SNR.
• Effective waveband emittance was analyzed for different temperatures, thicknesses, and angles.
• The proposed method demonstrated potential for improved temperature measurement accuracy.

Conclusions:

• The developed optical pyrometry method enhances temperature measurement for semitransparent ZnS.
• Optimization of the spectral band is critical for accurate high-temperature measurements.
• This research provides a framework for improving infrared pyrometry of ZnS materials.