Real-time micro-scale temperature imaging at low cost based on fluorescent intensity ratio

Area of Science:

• Materials Science
• Optical Engineering
• Thermal Imaging

Background:

• Real-time temperature imaging with high spatial resolution is challenging.
• Fluorescent materials offer rapid response and temperature dependence for sensing.
• Existing techniques often rely on slow point-by-point scanning.

Purpose of the Study:

• To develop a low-cost, real-time temperature imaging system.
• To overcome limitations of point-by-point scanning methods.
• To achieve high spatial and temporal resolution in temperature mapping.

Main Methods:

• Utilized the fluorescent intensity ratio (FIR) of SrB4O7:Sm2+.
• Employed two cameras with filters to simultaneously record two emission bands.
• Applied this method for real-time imaging of micro-scale thermal distributions.

Main Results:

• Achieved real-time temperature imaging with high spatial resolution (2.4 μm).
• Demonstrated a temperature resolution of ~2°C within 120-280°C.
• Imaging time was as fast as one second, capturing dynamic thermal changes on a PCB.

Conclusions:

• The developed FIR-based system offers a cost-effective solution for real-time, high-resolution temperature imaging.
• The system successfully observed dynamic micro-scale thermal distributions.
• Potential for diverse applications with optimized materials and detectors.