How does the infrared thermometer measure temperature?

The infrared thermometer is composed of optical system, photodetector, signal amplifier, signal processing, display output and other parts. The optical system concentrates the infrared radiation energy of the target in its field of view, and the size of the field of view is determined by the optical parts of the thermometer and its position. The infrared energy is focused on the photodetector and converted into a corresponding electrical signal. The signal passes through the amplifier and signal processing circuit, and is converted into the temperature value of the measured target after being corrected in accordance with the internal therapy algorithm of the instrument and the target emissivity. In addition, the target and the environmental conditions where the thermometer is located should also be considered, such as the influence of temperature, atmosphere, pollution and interference on performance indicators and correction methods.