III. How to Ensure the Temperature Measurement Accuracy of Infrared Thermometers
The infrared energy emitted by the object being measured is converted into an electrical signal on the detector through the optical system of the infrared thermometer. Important factors that determine the accuracy of temperature measurement include emissivity, field of view, measurement distance, and the diameter of the target being measured. Emissivity is influenced by factors such as the material properties, surface condition, and geometric shape of the object, which can be eliminated through multi-wavelength or dual-wavelength signal acquisition. The impact of the field of view, measurement distance, and the diameter of the target on the accuracy of the measurement can be eliminated through the design and manufacturing process of the optical system. Nowadays, most thermometers generally have an emissivity adjustment function.