How To Achieve Night Vision With Infrared Cameras?

Surveillance cameras are a very common surveillance tool in our lives. They are designed for security and evidence collection. In our daily life, surveillance cameras are installed in supermarkets on the road, restaurants, companies or even at homes. Monitoring at night requires higher-end and different monitoring tools. Infrared cameras are one of them. Infrared cameras, as the name suggests, are night surveillance cameras with the help of infrared. So how do infrared cameras achieve night vision? Let's analyze the principle of this.

The night vision principle of infrared camera:

1. The method of realizing night vision can use conventional visible light illumination, but this method not only cannot be concealed, but also exposes the monitoring target. Covert night vision surveillance uses infrared camera technology. Infrared camera technology is divided into passive infrared camera technology and active infrared camera technology. Passive infrared camera technology uses the principle that any object has infrared light emission above zero (-273°C). Since the infrared light emitted by the human body and heating objects is relatively strong, and the red light emitted by other non-heating objects is very weak, night monitoring can be realized by using a special infrared camera.

2. Passive infrared camera technology is not used in night vision systems because of the high cost of the equipment and the inability to reflect the surrounding environment. Active infrared camera technology uses a special "infrared lamp" to artificially generate infrared radiation, which produces infrared light that is invisible to the human eye but can be captured by ordinary cameras. It radiates "illumination" the scene and the environment, and uses ordinary low-light CCD black and white explosion-proof cameras or use" The camera or "explosion-proof infrared camera" that automatically turns black and white during the day and night can feel the infrared light reflected from the surrounding environment, so as to realize the night vision function.

The above 2 points are the principle of infrared camera to achieve night vision. I hope to help everyone. Infrared camera is actually a camera device that integrates camera, protective cover, infrared lamp, power supply and heat dissipation unit, etc. into one. The basic principle of night vision is to use CCD or CMOS to feel the spectral characteristics of infrared light (that is, to feel visible light and infrared light), and to cooperate with infrared light as the "illumination source" for night vision imaging.