Infrared applications and characteristics

Infrared rays are electromagnetic waves within a certain wavelength range, just like the solar energy and radio waves we are familiar with. After the light beam passes through the three-color mirror, it will form a spectrum composed of seven colors of red, yellow, orange, green, cyan, blue and purple. These are all visible light. The wavelength of visible light is 0.0004mm-0.001mm. The wavelength of infrared rays is 0.3mm-0.0007mm. The wavelength is longer than that of visible light and is located outside the red light, which belongs to invisible light.

Infrared applications:

1. Infrared switch

There are two types of infrared switches: active and passive. The active infrared switch consists of an infrared transmitting tube and a receiving tube. When the receiving tube receives the infrared rays emitted by the transmitting tube, the light is turned off; when the human body blocks the infrared rays, the light is turned on. The passive infrared switch uses the human body as an infrared source (the human body temperature is usually higher than the ambient temperature). When the infrared radiation is detected, the light is turned on. The common infrared sensor faucet also applies this principle.

2. Healthcare

In the infrared region, the most beneficial to the human body is the 4 μm~14 μm band, which has the magical energy to breed the growth of life in the universe. The survival and reproduction of all animals and plants can only be carried out under the specific wavelength of infrared rays, so many experts and scholars call it "fertility rays". Far-infrared textiles are a kind of precision ceramic powder that has emerged in recent years and is made through special processing. It has the functions of activating tissue cells, promoting blood circulation and improving microcirculation, improving immunity, strengthening metabolism, anti-inflammatory, deodorizing, antipruritic, and antibacterial.

3. Remote Control

Many household appliances are equipped with infrared remote control devices. The effect is best when the remote control and the infrared receiving port are in a straight line with the left and right deviation not exceeding 15 degrees.

4. Infrared interface

More and more electronic devices are equipped with infrared ports to support wireless transmission, avoiding the burden of cable connections. For example, infrared rays can be used to access the Internet through mobile phones.

5. Anti-theft device

It consists of an infrared transmitter and an infrared receiver. The infrared beam emitted by the infrared transmitter forms a blockade line that is invisible to the human eye. When someone crosses or blocks the infrared beam, the receiver will activate the alarm host, and the alarm host will immediately sound an alarm after receiving the signal.

6. Infrared remote sensing

Infrared remote sensing equipment can be used to detect various mineral deposits in the dark night. my country has used infrared remote sensing photos to investigate geothermal resources and radioactive mineral deposits.

7. Infrared reconnaissance

Reconnaissance satellites carry infrared imaging equipment to obtain more intelligence information on ground targets, identify camouflaged targets and monitor ground military operations at night; missile early warning satellites use infrared detectors to detect the infrared radiation of the engine tail flame when a missile is launched and issue an alarm, providing a certain amount of warning time for intercepting incoming missiles.

8. Infrared guidance

Infrared guidance uses the target's own infrared radiation to guide the missile to automatically approach the target in order to improve the hit rate.

Infrared rays are widely used in high-tech fields such as aviation, aerospace, remote control and remote sensing of military equipment, as well as in daily life fields such as heating, insulation, food baking, heating, medical care, etc.; infrared heating technology using various gases as heat sources has been widely adopted, and a new infrared light wave radiation heating gas stove has come into being.

Infrared features:

(1) Conduct heat energy through radiation; has strong penetrating power, can heat objects quickly; is not absorbed by the atmosphere, so there is no waste; is not affected by the surrounding environment (such as humidity, temperature, etc.);

(2) High thermal efficiency: There is no chemical loss or physical loss during the heating process, and there is little heat energy loss during the heat transfer process, resulting in high utilization rate and less waste.