What kinds of infrared light sources are there?

As we all know, there are two kinds of light in nature, one is visible light and the other is invisible light. So what is invisible light? Because the wavelength of light is too long or too short to be seen, such as infrared rays and ultraviolet rays. The wavelength of infrared radiation is greater than that of red light, so it is invisible to the naked eye, while the wavelength of ultraviolet light is shorter than that of violet light, so it is invisible. What I want to share with you today is infrared light source. What kinds of infrared light sources are there?

Infrared light sources are generally divided into three types: thermal radiation, gas discharge and laser. The following are introduced separately.

A, thermal radiation infrared light source

The infrared light source with thermal radiation is usually a blackbody or a charged silicon carbide rod, and the blackbody is usually the best light source, because the radiation power density of the blackbody is much higher than other infrared light sources with thermal radiation at the same temperature.

Incandescent light bulbs can also be called infrared light sources. Some friends will wonder, isn't incandescent light sources invisible? In fact, incandescent lamp can convert 75% of electric energy into infrared radiation, so it can also be called infrared light source. However, because the infrared radiation radiated by incandescent lamp is absorbed by the glass shell outside it, there is not much infrared light, so it is a light source close to infrared light.

Second, the gas discharge infrared light source

Gas discharge infrared light source means that some gases can emit infrared radiation while discharging, so this light source can be used as infrared light source. For example, the spectrum of xenon lamp is continuous, and radiation reaction can occur near infrared, and the reaction is fierce. Therefore, this kind of lamp can be used as a light source when it is used as a simulated light source of the sun and a heat source for smelting metals. Moreover, its infrared radiation ability is relatively easy to control, and it can be used in infrared communications industry.

Third, the laser infrared light source

Some laser devices can also be used as infrared light sources, such as glass solid-state lasers, which can also be used as infrared light sources because of their long wavelength and similar wavelength. There is also a carbon dioxide gas laser, which has a longer wavelength than infrared, so it can be used as a far infrared light source. There are also some semiconductor lasers that can be used as infrared light sources through various processes and treatments.

The above is the related content of various infrared light sources. I don't know how much you understand. Infrared light source covers a wide range, including heating, physical therapy, night vision and so on. It is not only an important knowledge point in physics, but also an indispensable element in work and life. Because the infrared light source product is relatively small in size, light in weight and very convenient to use, it is also a very practical lighting tool.