Infrared Sensor Definition

Infrared light, also known as infrared light, has the properties of reflection, refraction, scattering, interference, absorption and so on. Any substance that has a certain temperature (above absolute zero) can radiate Infrared.
The essence of infrared radiation is thermal radiation. When the temperature of the object is lower than 1000 °C, it is no longer visible light that is radiated outward, but infrared light, infrared rays when passing through the atmosphere, there are three bands with high transmittance, which are 2~2.6 uM, 3~5 uM and 8~14 uM.
An infrared sensor is a sensor that senses the radiation of a target and uses the physical properties of infrared to measure. Infrared sensing system is a measurement system using infrared as the medium, which can be divided into five categories according to its function:
(1) radiometer for radiation and spectral measurements;
(2) search and tracking system for searching and tracking infrared targets, determining their spatial position and tracking its movement;
(3) Thermal imaging system, which can produce a distribution image of the infrared radiation of the entire target;
(4) Infrared ranging and communication system;
(5) Mixed system refers to the combination of two or more of the above types of systems.