Thermal imaging versus night vision

Thermal imaging is also a type of night vision device, but thermal imaging is very different from ordinary night vision devices! Thermal imaging is based on passive reception of infrared energy that radiates outward from everything above absolute zero! The detected infrared rays are defined and imaged according to the different temperature of different objects and the intensity of radiation. Various styles of display modes, including common white heat, black heat, pseudo-color, etc.!

The night vision device is actively receiving for imaging. The night vision device must have an external light source that reflects on the object and then receives the image in the night vision device machine. Night vision devices focus existing ambient light (starlight, moonlight or infrared light) through the front lens. This light, composed of photons, enters a photon cathode tube, turning the photons into electrons. The electrons are then amplified to larger numbers through electronic and chemical processes. The electrons are then projected onto a screen, turning the magnified electrons back into visible light, which can be seen through the eyepiece.