Time: 2024-08-01
A new method to measure the continuous spectrum of light , developed by Professor Jiming Bao from the University of Houston , is set to revolutionize thermal imaging and infrared thermography . These techniques are crucial in various fields , from medical diagnostics to military applications , as they allow for accurate temperature measurements without direct contact with the subject being photographed . Thermal cameras and infrared thermometers detect infrared radiation , converting it into visible images that represent varying temperatures , showcasing heat patterns and differences.
The University of Houston researchers have devised a groundbreaking noncontact optical method that can measure the temperature of hot surfaces with an accuracy better than 1C. This enhanced technique aims to provide a better understanding of processes inside photothermal catalysts , which harness laser heating to initiate chemical reactions . Traditional thermal cameras and infrared thermometers face challenges due to unknown emissivity of targets , leading to inaccurate temperature readings . However , the new method uses a near - infrared spectrometer to capture the full emission spectrum , allowing for precise temperature determination over a wide range of temperatures.
The technique developed by Professor Bao involves a simple calibration step to eliminate wavelength- and temperature - dependent emissivity , ensuring accurate temperature readings . By measuring the temperature of a heating stage and the surface temperature gradient of a catalyst powder under laser heating , the researchers have demonstrated the effectiveness of the new method . This advanced technique overcomes limitations of single - wavelength and multi - spectral thermometry , providing valuable insights into the thermal properties and behaviors of various objects and environments.
The new approach not only enhances the accuracy and precision of temperature measurements but also offers a deeper understanding of non - thermal contributions in photothermal reactions . By addressing the challenges faced by conventional thermal imaging tools , this innovative technique can help solve problems in fields where accurate measurements of high surface temperatures are required . With applications in medical diagnostics , building inspections , military and security , as well as mechanical inspections , advanced thermography techniques are poised to revolutionize the field of Medical imaging and beyond.