The Main Characteristics and Applications of Infrared
Infrared and shorter wavelength electromagnetic waves are beyond the scope of radio waves, but they are closely related to radio, so they are introduced here by the way.
Infrared (Infrared) is an electromagnetic wave with a wavelength between microwaves and visible light, with a wavelength between 1mm and 760 nanometers (nm), which is invisible to the naked eye. Substances above absolute zero (-273.15°C) can generate infrared rays.
With the help of some specialized sensors, we can feel infrared rays. For example, an infrared camera receives infrared light emitted by surrounding objects and converts it into a visible light image to make an infrared thermal imager to view the temperature distribution of electronic circuit boards or electrical circuits. Or night vision goggles to see what's around you in the dark. But our naked eyes can never see the real infrared rays, and the current thermal imager or night vision device cannot achieve the thin and light shape of ordinary glasses.
Infrared rays are not interfered by radio waves, and the mutual conversion of electrical signals and infrared rays is very easy. Therefore, infrared short-range communication has become a supplement to radio communication, such as infrared laser communication, TV remote control, infrared remote-control toys, infrared interfaces of mobile phones and computers, etc. Other applications of infrared rays in daily life are also very extensive. High-temperature sterilization, monitoring equipment, infrared thermometers, infrared lamp controls, infrared ovens, etc., all have the shadow of infrared rays. In the medical field, infrared rays can also improve blood circulation, increase the phagocytic function of cells, eliminate swelling, promote the dissipation of inflammation, and treat chronic inflammation.
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