We all have known the importance of installing night vision network cameras to obtain better images and footage during the dark. It is during this time that the cameras are capable to capture things that are not visible to the human eye. Images are better captured with the use of the IR Illuminators installed along with these cameras. These illuminators are mainly used for the Infrared light that they provide so that the cameras can capture a clear image. This light is invisible to the human eye and thus does will not give an idea about a camera being installed in a place.
The clarity of the image or the video footage obtained highly depends on the kind of IR light emitted by the IR Illuminator. You will rather prefer buying a camera that provides high resolution images. But, higher the resolution of a camera, more evenly distributed the light has to be. These cameras will not be able to capture an image if the IR light from the illuminators is focused in a single direction. The light emitted by this device needs to be focused evenly throughout the range of the camera.
Consider a situation that you are driving a car on a highway. It is pitch dark and you can only see the road and a little more because your headlights are on. Suddenly a car is coming from the opposite direction that also has its headlights on, will cause disturbance in your sight. This is because the light was quite evenly distributed while you were alone, but later as another car appeared, a flash of light coming from a single direction will suddenly prick your iris. This will affect your vision for a while. This is a similar case in cameras as well.
Cameras with a lower resolution give out images that are made of less number of pixels of larger size. Whereas, the high resolution images obtained are the ones that contain high number of pixels, each made up of a smaller size. The larger the pixel, the more it can capture an image. The smaller the pixel, the more amounts of minute details are required. Hence, the quality of lighting may affect these too. Larger pixels may not need even distribution of light, but the smaller ones will need enough of light to be distributed in each of them. Thus, even distribution of the IR Light is required while we expect a network camera to give out clearer images.