What's the difference between an infrared camera and an ordinary camera?

The difference between infrared cameras and ordinary cameras is that infrared cameras can shoot portraits at night, even without lights, while ordinary cameras can't shoot portraits. Infrared photography is good during the day, but black and white will appear at night due to environmental restrictions, resulting in unclear imaging scenes, and people will see red light when they look at their eyes with infrared at night.

The infrared light emitted by the infrared lamp illuminates the object, and the object is received by the monitoring camera after diffuse reflection, forming a video image. Just like lighting with a flashlight in the dark, a flashlight is equivalent to infrared rays, and a camera is equivalent to human eyes. The reason is the same.

Infrared cameras can be divided into ordinary infrared cameras and dot-matrix infrared cameras. Dot-matrix infrared camera is better than ordinary infrared camera, with long irradiation distance, fine and clear image quality and longer service life. The sensitivity of an infrared camera is infrared, within a certain wavelength range, such as 800nm- 1 100nm. In terms of spectrum, it is similar to the principle that ordinary cameras sense visible light. The working principle of the infrared camera is that the infrared light emitted by the infrared lamp irradiates the object, and the infrared light is diffused and received by the monitoring camera to form a video image.

The infrared camera needs to determine the camera type according to the specific use environment, especially the night environment, as follows:

1. Investigate the light source environment where the infrared camera installation point is located at night: whether there is light or no light, whether the light is dim or no light environment determines how low the infrared light of the camera is, and it will automatically turn on the auxiliary camera to monitor and obtain good image effects.

2. Determine the approximate range that the infrared camera needs to see in the environment: If you want to see 30 meters, 50 meters, 80 meters or 100 meters, at this farthest distance, whether you need to see the movement of the object or you must see the face, the projection range can also be understood as ordinary light projection. However, when choosing an infrared camera, the range of infrared light and camera lens has been determined, and a set of finished products has been made for infrared light and camera lens.

3. It should be pointed out that the larger the night vision exposure area, the higher the cost and the greater the energy consumption. Therefore, users can install auxiliary infrared light sources in some important areas according to specific practical needs, so as to obtain good monitoring effect in a large range in some important areas.

References:

Baidu encyclopedia infrared camera entry