Infrared light is also called infrared, it is a British scientist discovered. In 1800, Hershey Seoul in the study of sunlight, let the light through the prism divided into colored light with his band of light with a thermometer to measure the caloric content of different colors. Trial, he accidentally discovered a strange phenomenon: on the red light with a thermometer outside, other than the indoor Infrared temperature indication value high. Through trial and error, heat up the so-called high-temperature zone is always located at the red light with the outside edge. So he announced that in addition to solar radiation outside the visible light, invisible to the human eye there is a "hotline" that the human eye can not see the "hotline" is located outside of the red light, called infrared. (However, I want to clarify is the fact that the energy emitted by the sun in the green wavelength of 580nm the strongest.)

 

Infrared is an electromagnetic wave, and radio waves, visible light has the same nature. Infrared wavelengths between 0.76 ~ 100μm, located between radio waves and visible light. Any object, as long as it's under 273 high temperature than zero, it is, without exception, emit infrared.

 

In nature, all objects above absolute zero temperature are always sent to the surrounding space infrared radiant energy. Infrared radiation of objects the size and energy distribution by wavelength - and it's surface temperature has a very close relationship. Thus, through the infrared energy radiated by objects in their own measurements, can accurately determine its surface temperature, which is based on infrared temperature measurement objective basis.

 

Infrared thermometer by the optical system, photoelectric detectors, signal amplifiers and signal processing, display the output components. Field of view optical system together its goal of infrared radiant energy, field size from the thermometer to determine the optical components and their locations. Infrared energy is focused on the photoelectric detector and into a corresponding electrical signal. The signal through the amplifier and the signal processing circuit, and treatment in accordance with the instrument and the target emission rate of the algorithm after correction into the measured target temperature. In addition, the thermometer should also be considered where the goals and environmental conditions such as temperature, atmosphere, pollution and disturbance factors such as the impact on performance indicators and correction methods.

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