With more wide demand for night vision monitoring and security video surveillance system in engineering, infrared cameras have entered the mainstream market, camera sales grow with each passing day, problems in the application of infrared night vision technology is gradually exposed. In this paper, the matters needing attention in technical problems of infrared camera and selection are discussed.Buy LED infrared light source Infrared projection LED IR camera is like a flashlight, when the projection angle is small, the projection distance is far, but the monitoring range is smaller, vice versa. In most people’s mind, will think that the amount of LED infrared light determines the IR camera is good or bad, but in fact, this view is not very accurate. At present, the market of LED infrared lamp infrared camera roughly divide into external or built-in two kinds of design methods, power size will affect the detection distance of camera’s built-in LED lights, such as small space, so the monitoring distance is short. Now we will be pointed out that in fact, power of infrared LED lamp is directly influence the infrared camera irradiation distance.
At the same time, in order to achieve the best effect, the match between the LED lamp assembly design, the LED lamps and the lens is also very important. you want to enhance Virtual function of the IR camera,
First of all have to choose LED infrared light, only the high power, low current will not be overheated;
Secondly to select better LED aluminum substrate to draw heat dissipation, will not produce heat dissipation result is not good, waterproof fan fog and dust and other issues with the normal glass fiber substrate;
Third is to prevent exposure problem of infrared surveillance cameras, must solve LED infrared light reflection situation fundamentally, can add the metal partition isolation between the LED lamp and the lens, to prevent interference with the LED light;
in addition, in order to prevent fogging, also for IR camera waterproof problem is to focus on the problem of strengthening;
Finally, usually the infrared camera in the day’s focus is normal, but at night are often not normal focus, it must improve the lens depending on internal ED glass technology.
How to decrease the infrared lamp irradiation distance bring power attenuation, and prolong the service life of the infrared monitoring products, is also an important topic. We can by following these methods, in order to achieve this goal: the selection of high quality infrared led light; made of metal thin film reflective technology; adopts high efficiency optical lens (5% higher than ordinary glass light transmittance); keep constant current and constant voltage source circuit design, to ensure that the work in the current state of stability; Adapt LED circuit protection system; infrared lamps each power alone, avoid current vicious circle, failure even single lamp damage will not cause the entire lamp system; can also use multiple design to ensure that the infrared single life etc..
Analysis and application of LED infrared light source
Infrared remote control with IR LED, because the infrared light emitted by the LED is not entirely the infrared light, also contains part of the visible light (red) components, so the naked eye can see little lighting. To use the remote LED, the general emission angle is 30 degrees, even if a user is not completely aligned to the target, but also can operate effectively.
When no external infrared interference, remote control distance can reach 5 meters or more，
But there are have infrared in natural light。in generally the , the distance of the remote control within 3 meters。 Of course, enhance the transmit power of remote controller can improve the remote control distance. In theory, the transmit power increased by 100%, the distance of the remote control lifting 40%.Also with the infrared LED for monitoring camera, personally think that the most used is similar and remote control products. The sensitive range camera comprises the infrared region; therefore the use of infrared LED lighting, can let the camera to obtain the clear image. The effective distance of single LED lighting is generally not more than 2 meters, and at that distance, brightness is already very low. So the general monitoring using a plurality of LED side by side, LED amount is more, effective range farther, the approximate relationship also follow the 100%-40%. Now many LED companies have launched the infrared high power LED, power from 1W to 5W range. In General 1W infrared LED can meet the ordinary camera in the 5 metre distance lighting requirements. High power infrared LED mainly uses, in addition to use in monitoring occasions, also used in the field of military and civil situations such as search.