During the use of the surveillance camera, it may be affected by the outside world, and some problems may occur, so that the camera cannot complete the normal monitoring work. Today Xiaobian will tell you how to adjust the back focus of the surveillance camera to ensure that the camera works better for us.

In daily use, the road surveillance camera will be affected by various external force factors such as vibration when the vehicle is running, the impact of the vehicle, etc., resulting in changes in the aperture of the camera, which may obscure the captured image. It is difficult to identify the license plate at night. This makes it difficult to exert the power of the monitoring system and has a certain impact on the normal operation of the operating system.

In the daily equipment maintenance, I have found a little trick for camera debugging for your reference. Today's road surveillance cameras generally use JvaSANY, Baitu, etc., which have a strong light suppression function. A standard lens is mounted on the front end of the camera, which enables the image of the subject to be exactly on the target surface of the CCD image sensor. At the top of the top, there is a gear that adjusts the back focal length. When the camera is shipped from the factory, the back focus is adjusted appropriately. Therefore, in the application of the fixed-focus lens before mating, it is generally unnecessary to adjust the back focus of the camera. . In normal use, it may appear that when the lens focus ring is adjusted to the limit position, the image cannot be sharpened. In this case, the back focus of the camera needs to be adjusted.

The steps to adjust the back focus are as follows:

1. Loosen the fixing screw of the standard lens on the front of the camera, adjust the zoom adjustment (ZoomIn) to push the lens to the telephoto state, take a close-up of a distant object, and then adjust the focus to sharpen the close-up image. .

2. Perform the zoom adjustment (ZoomOut) opposite to the previous step to pull the lens back to the Wide state. At this time, the screen changes to a panoramic image containing the above-mentioned close-up object, but the focus adjustment cannot be performed at this time (Note: If At this time, the image becomes blurred and the focus cannot be adjusted. Instead, the next focus adjustment is prepared.

3. Rotate the back focus adjustment ring slightly, repeat the adjustment until the picture is the clearest, and then tighten the fixing screws of the front standard lens.

Here, the adjustment of the surveillance camera is over. I hope this article can help the majority of friends and solve everyone's problems in adjusting the surveillance camera.