Night vision surveillance camera
With the advancement of camera technology, night vision monitoring is still in the process of further development. Currently, it is limited by the application field of cost picture definition and the unique properties of luminescent materials such as infrared light wave laser. Array infrared is still the best and most practical in the field of night vision monitoring. The solution, which improves the defects of the traditional LED surveillance camera, can achieve the relatively best night vision monitoring effect, and also has a good effect in the field of road monitoring license plate, which makes up for the gap in the current market. Compared with the traditional LED surveillance camera, it has the following advantages.
Obviously, the higher the brightness, the farther the illumination distance is. The output power of a single LED is generally 5~15mW. Although the current can be increased by increasing the current, the limitation of the material itself is the photoelectric conversion efficiency of the infrared. Not high, only 20% of the light, the remaining 80% is heat. Therefore, while increasing the brightness, more heat energy is generated, which is obviously not feasible for the key device CCD of the camera with strict operating temperature. In addition, multiple combinations of LEDs are based on PCB boards, and the heat dissipation performance is not good. The light source of the array infrared camera is configured with a good heat conducting device by encapsulating dozens of high-efficiency and high-power crystal cells on a flat surface through high-tech. At the same time increase its photoelectric conversion efficiency, the brightness is about 100 times that of a single LED.
As mentioned earlier, array infrared uses a highly integrated advanced packaging technology, an array of infrared chips packaged with dozens of wafers, only the size of the fingernail. Imagine what it would be like to combine dozens of individual LEDs together. The smallest size is most convenient for application. If you install dozens of individual LEDs combined with an infrared light source on a high-speed dome, the effect is conceivable. Known.
The array infrared technology ensures the good working condition of the CCD, and its service life is 9 times that of the ordinary LED infrared camera. The ordinary LED infrared camera places the LED light-emitting tube and the camera in a cavity, and the heat of the LED tube cannot be effectively radiated through the PCB board, and the temperature problem seriously restricts the service life of the CCD. After 3 months of use, the ordinary LED infrared camera began to show signs of aging, blurred image, whitened, lack of contrast, etc., which directly affected the product use effect, and even the entire camera was scrapped.
Determined by the characteristics of the semiconductor itself, its luminous efficiency and heat dissipation performance are a benign annulus. The better the heat dissipation performance, the lower the operating temperature, the lower the operating temperature and the better the luminous efficiency. On the contrary, it is a vicious circle of decreasing efficiency. In addition, our power supply system uses our own patented high-frequency spike supply to ensure higher efficiency.
Five light uniform
As we all know, each ordinary infrared LED has a spherical surface in front, which is an independent optical design to change the size of the spot. When a plurality of infrared LEDs are combined around the camera lens, the emitted light is composed of a plurality of spots overlapping, and the overlapping portions are particularly bright, and a circle is formed, that is, a flashlight effect, and the night vision effect is of course not average. The array infrared camera is equivalent to a large point light source. Through special optical design, the light is evenly illuminated to the monitored object, and the brightness of the middle and surrounding of the obtained monitoring picture is consistent.
Array infrared camera technology will inevitably lead to a new technological revolution in the field of night vision monitoring, so that people’s monitoring vision is continuously extended to meet the requirements of night vision monitoring in different application fields. With the further improvement of the infrared recognition of the array and the expansion of the application field, and the large-scale production effect brought by it, the production cost will be greatly reduced, so that the array infrared technology can be further promoted and popularized. Therefore, when selecting a camera, it is best to select an array infrared camera instead of an LED infrared camera.