Introduction to the imaging principle of thermal imaging night vision equipment
The thermal imaging night vision system can produce realistic and clear thermal images in conditions of total darkness, mist, and smoke. It can seamlessly connect with widescreen navigation systems and multifunctional navigation systems. The camera lens can freely rotate 360 degrees horizontally and pitch up and down ± 90 degrees, allowing you to experience the sensory enjoyment and safety guarantee brought by military technology.
Designed to enhance the driver's visual ability. The system can output clear thermal images of the road conditions ahead in harsh weather conditions such as full darkness, haze, and low visibility such as glare from headlights, effectively improving the driver's visual range.
At the same time, only pedestrian recognition and front vehicle collision warning functions can detect pedestrians, vehicles, and obstacles in advance, greatly improving driving safety.
Principles of imaging night vision equipment:
Thermal imaging is passive infrared, which is generated by receiving the temperature (thermal energy) of an object and processing it into an image for display. Generally, the image is grayish white regardless of day or night.
Thermal imaging is not active infrared. The thermal imaging night vision device itself does not emit infrared rays, but only receives a specific range of infrared rays. Therefore, it is easy to conclude that as long as the thermal imaging can receive the infrared rays emitted by the object, there is an image output. Conversely, if the infrared rays cannot be received, it cannot reflect the image of the object we want to see.
So now some of the questions we are all asking, such as whether thermal imaging can perspective, penetrate walls, see people and objects in cars, and penetrate glass, have certain results.
If you pass through walls or glass, the wall blocks the infrared rays, and the thermal imaging night vision system cannot receive infrared rays and cannot detect objects on the other side of the wall and glass. That is to say, if there is an image, it must not be completely blocked by all sealed objects, otherwise infrared imaging will definitely not be received.
In environments such as trees and grass, thermal imaging can still detect objects that are hotter than plants due to not completely blocking infrared light. If there are people and animals behind the grass and trees, it is obvious that there is a temperature difference. Objects with high temperatures will light up, while objects with low temperatures will be darker.
Thermal imaging is actually temperature difference imaging. Objects with high temperatures emit stronger infrared radiation, while objects with low temperatures emit relatively weaker infrared radiation.
When a person walks behind the glass, they cannot see the image of the person because the glass blocks the infrared rays of the person outside, and the thermal imaging night vision device cannot receive the infrared rays, so it cannot display the presence of a person in the image.
Two people are standing inside, with a person in the image and a person on top of the glass. This is because the infrared of the person is received by human thermal imaging. In addition, there are people on the glass because human infrared is emitted in all directions, and the infrared emitted onto the glass is reflected back by the glass and received by the thermal imaging night vision device. Therefore, we can see the image of a person on the glass.
When a person is wearing clothes, most of the infrared rays are blocked by the clothes, and the body part is relatively black because the temperature of the clothes is much lower than that of the person's head. The head with high temperature is brighter, while the clothes with low temperature are darker.
At this point, someone placed two palms on the clothes for 2 seconds, and we found that there were two palm prints on the clothes. That is, the temperature of the palm was transmitted to the clothes, and the temperature of the palm disappeared after 2 or 3 seconds. That is, the temperature of the palm on the clothes slowly dissipated and disappeared.
