Four-Wavelength Thermal Imaging for High-Energy-Density Industrial Processes

Area of Science:

• Optics and Photonics
• Thermal Engineering
• Image Processing

Background:

• Multispectral imaging offers advanced thermal analysis capabilities.
• Scanning-free 2D spectral data acquisition is a key advantage.
• Accurate temperature mapping requires robust data correction and calibration.

Purpose of the Study:

• To develop a basic design and temperature estimation method for a four-channel multispectral imaging system.
• To establish a workflow for data correction and processing in thermal imaging.
• To validate the system's accuracy and demonstrate its practical application.

Main Methods:

• Designed a four-channel multispectral imaging system.
• Implemented camera calibration for optical element and sensor property compensation.
• Developed a data correction and processing workflow.
• Validated the temperature estimation method using a blackbody source.

Main Results:

• Achieved a mean relative temperature error of 1% when validated with a blackbody source.
• Successfully demonstrated temperature mapping of a tungsten lamp filament.
• Visualized non-uniform temperature distributions and localized deviations with adequate spatial resolution.

Conclusions:

• The developed multispectral imaging system provides an accessible and accurate method for thermal mapping.
• The system effectively detects and visualizes thermal variations in practical applications.
• This technology holds promise for various thermal imaging applications requiring detailed temperature analysis.