lämpöinfrapunaalueen

The thermal infrared region, also known as the lämpöinfrapunaalueen, is a portion of the electromagnetic spectrum that lies between the mid-infrared and microwave regions. It is characterized by wavelengths ranging from approximately 3 to 15 micrometers (µm) and frequencies from about 20 to 100 THz. This region is significant in various scientific and technological applications due to its unique properties.

In the thermal infrared region, the energy of photons is sufficient to excite molecular vibrations and rotations, making it useful for studying molecular spectroscopy. This region is also crucial in remote sensing and thermal imaging, where it allows for the detection and measurement of heat radiation emitted by objects. Thermal infrared sensors are employed in various fields, including meteorology, astronomy, and medical imaging, to capture and analyze thermal data.

The thermal infrared region is further divided into two sub-regions: the near-infrared (NIR) and the far-infrared (FIR). The NIR sub-region, which spans from 3 to 5 µm, is often used in applications such as night vision and thermal imaging, as it can penetrate fog and smoke. The FIR sub-region, ranging from 8 to 15 µm, is utilized in applications like thermal imaging for medical diagnostics and industrial inspections, as it provides detailed information about the temperature distribution of objects.

The thermal infrared region plays a vital role in understanding the thermal properties of materials and the behavior of heat in various systems. Its applications span across multiple disciplines, making it an essential area of study in both fundamental and applied sciences.