Often, there is the need to secure our property and other very important items. The use of video coverage systems is becoming more frequently used globally – both in government-owned and private establishments. One importance of using video coverage systems is that it helps us monitor our property effectively against any form of theft and other illegal activities.
Most criminal and burglar activities happen in the dark. Because of this, many security cameras come with the night vision feature enabling them to vividly monitor dark places.
How does night vision camera work?
This technology (infrared night vision) makes use of the infrared light to see in the dark. Although various night vision lenses exist, the infrared night vision is a feature of most security cameras. When the environment gets dark, the infrared light swings into action almost immediately and light floods the entire environment in the camera’s lens.
One amazing character of this infrared light is that it is invisible to sight, hence, it cannot be detected. the whole place is virtually flooded with light using the night vision technology, but in the real sense, the whole place is dark because the eyes cannot detect the infrared rays.
Videos captured by these cameras are in black and white formats, therefore, many cameras will have their monochrome filter turned on automatically and make the image more presentable. A great example is the latest Hikvision cameras which are also multi-featured in most cases.
During the day, another feature, called the infrared cutter blocks out all the infrared light coming into the camera to keep the real color of the environment. When the place becomes dark or when night comes, the feature is blocked and once again, infrared rays are permitted to enter the camera.
Intensifier tubes and how they operate
Night vision cameras are of several varieties; some can be found in night vision spectacles that have intensifier tubes. In this case, a very high signaling sensor is used in the camera. These cameras have a special lens that converts rays of light into signals. Another device traps the signals and amplifies it to produce the required image.
Night vision technology is possible because even in the dark, there are still some rays of light that are present. More also, at night a place is not totally dark because there will still be some rays of light coming from the moon or a nearby source of light. What cameras and night vision spectacles do is to detect these rays of light and multiply them for producing great images.