thermal infrared (TIR)
Thermal Infrared (TIR) is thermal infrared radiation that sweeps multiple infrared regions.
Thermal infrared is emitted by human bodies and other heat sources and has wavelengths between 3 µm and 1,000 µm, or 1 mm. It thus lies in the wavelength ranges of Mid Wavelenght Infrared (MWIR), Long Wavelength Infrared (LWIR) and Far Infrared( FIR). The thermal radiation of the human body lies between 3 µm and 50 µm.