Several common problems of infrared camera

Infrared series is currently the most commonly used in surveillance engineering. The early infrared night vision system was not used in civilian applications. It was mainly used in the military. However, the active infrared night vision system is easy to be discovered by the enemy because it emits infrared light. It has been basically eliminated in the military, but it has been greatly developed for civilian use.

The simplest configuration of the infrared system at this stage is: camera, lens, infrared lamp, infrared lamp power supply; the camera here refers to a low-illumination camera, and the infrared wavelength emitted by the infrared lamp can be received by the camera, and the lens requires night Depending on the lens, the main indicator is the F value. The smaller the F value, the better the night vision effect.

The night vision distance of the night vision system is a comprehensive indicator. Only the reasonable configuration of the camera, lens and infrared light can achieve the ideal sight distance. In addition, it is also related to the contrast of the observed target. Some people do not regard the night vision distance as a The comprehensive index of the organism, only one-sided emphasis on a certain factor, while ignoring other factors, which is impossible in engineering equipment selection. In practical applications, a more accurate statement should be expressed as follows: use a camera with a bottom illumination of 0.01LX and a resolution of 420TVL, equipped with an 8mm lens with an F value of 1.4, and equipped with a 15-meter infrared lamp to observe people ’s night vision The distance is 15 meters. So the night vision distance is a comprehensive indicator. In addition, it should also be noted that the color camera cannot be used for night vision, because the color filter in front of the color camera will filter out infrared light, and the CCD cannot image. Experienced equipment vendors and engineering vendors generally do not experience equipment configuration issues. However, due to the lack of comprehensive understanding of night vision systems by some engineering companies, the problem of unsatisfactory night vision distance often occurs in actual projects, which causes a lot of trouble to the acceptance of engineering companies, so it is recommended that engineering companies purchase night vision equipment Inquire more about infrared lamp manufacturers, talk about the project site environment, and the effect to be achieved. In this way, the manufacturer will cooperate with you to equip the equipment more reasonably and make the acceptance pass smoothly.