Several common fault resolutions for video surveillance camera images

The main reasons for the unclear image of the monitor image include electronic signal interference, unfocused focus, dirt on the lens, problems with the electronic shutter or white balance setting, and adjustment of the back focus.

1. Electronic signal interference

The inside of the camera is a highly integrated system that is more susceptible to interference from external electronic signals. If the monitor screen will appear beating or streaked, it may be that the camera is disturbed. Be careful not to disturb the source of electronic signal interference during installation.

2, the focus is not clear

After the lens zoom is adjusted, the focus should be adjusted accordingly. It can be clearly focused within a certain depth of field (sometimes it may be small). If there is no focus, the focus may not be adjusted to the ideal position.

3, the lens has dirt

Dirty objects on the lens will directly cause blurring and sensation of the monitor image. AVENIRETOKU Seiko lens technicians remind everyone that when installing, be careful not to pinch the ends of the lens, which makes it easy to leave fingerprints on the lens. In case the lens is stained with fingerprints or dust, be sure to wipe it with a special wipe, instead of using a paper towel, a soft cloth and alcohol (it is easy to destroy the coating on the lens surface).

4, there is a problem with the electronic shutter or white balance setting

When the camera is shipped from the factory, the various adjustment devices are generally set in the ideal default position. If there is no special need, the default settings should be kept as much as possible during installation.

5, the back focus needs to be adjusted

The so-called back focus (non-flange focal length) refers to the distance from the apex of the last lens surface of the lens to the focal plane. After the zoom is adjusted, the focus is adjusted to the ideal position. The picture is still unclear (or focus on the telephoto end of the lens and then zoom to the wide-angle end to see if the wide-angle end is clear), which may be a problem with back focus.

Some cameras (or lenses) have a back focus adjustment device, and some are controlled to a small range at the factory. If there is no back focus adjustment device and there is a back focus problem, it can only be repaired and added. Reconnect the ring or replace the corresponding product.