In the installation of general security monitoring system, the installation and debugging methods of high-definition network cameras and ordinary cameras are basically the same, but you must pay attention to the selection of the lens, because the quality of the lens is not good, or the selection is not good. Affect the clarity of the picture;
For example, infrared night vision system cameras are best to use infrared lenses, while 1/3-inch CCDs are generally equipped with 1/3-inch lenses, and 1/2-inch CCDs are generally equipped with 1/2-inch lenses. The focus of the lens is adjusted during installation and debugging. It must be adjusted well, especially the back focal plane of the camera must be adjusted. In many cases, the unfocused lens will cause the image to be blurred and fail to meet the high-definition requirements.
In addition, the protective cover of the camera cannot be ignored. The front glass of the gun-type protective cover cannot use general flat glass, but must use better optical glass. General flat glass has a very strong weakening effect on the resolution of the image. The spherical cover should pay more attention to that the curvature of the spherical surface must be smooth. It is best not to aim the lens at the upper edge of the spherical cover. The refractive power of the light here is large, and it will even seriously affect the sharpness of the image. It’s important to note that no matter what kind of housing, it’s best if the light inside the housing is as low as possible, and the distance from the lens to the housing is as short as possible. This can minimize the light pollution in front of the lens and improve the image. The clarity.
