Wuxi Monitoring Installation monitoring video camera Generally, it can work as long as the lens is correctly installed, the signal cable is connected, and the power is connected.
1、 Wuxi monitoring installation and adjustment of lens aperture and focus:
Wuxi Monitor installs and adjusts the lens aperture and focus, closes the electronic shutter and backlight compensation switches on the camera, aims the camera at the scene to be monitored, and adjusts the lens aperture and focus ring to optimize the image on the monitor. If the camera is used in a situation where the illumination changes greatly, it is better to connect an automatic aperture lens and set the electronic shutter switch of the camera to OFF. If the manual aperture is selected, the electronic shutter switch of the camera should be set to ON, and when the application site is the brightest (maximum ambient light intensity), the lens aperture should be opened as large as possible and the image should still be the best (the image should not be too white and overloaded), and the lens adjustment is completed. Install the protective cover and mount the support. Since the aperture is large and the depth of field is relatively small, the sharpness of the whole monitoring site should be taken into account when focusing. When the field illumination decreases, the electronic shutter will automatically adjust to a slow speed, and with a larger aperture, the image can still be satisfied.
In the above adjustment process, if the aperture of the lens is not opened as large as possible when the light is bright, but closed relatively small, the electronic shutter of the camera will automatically be adjusted at low speed, so that a good image can still be formed on the monitor; However, when the light is dim, because the aperture of the lens is relatively small and the electronic shutter is at its slowest (1/50s), the imaging may be dim.
2、 Wuxi monitoring installation lens:
Wuxi surveillance cameras must be equipped with lenses before use. Generally, appropriate lenses should be selected according to the actual situation of the application site, such as fixed focus lens or zoom lens, manual aperture lens or automatic aperture lens, standard lens or wide-angle lens or telephoto lens. In addition, attention should also be paid to the interface between the lens and the camera, whether it is a C-type interface or a CS type interface (remember this, otherwise the CCD chip of the camera may be damaged when the C-type lens is directly screwed into the CS interface camera).
When Wuxi Monitor installs the lens, first remove the camera and lens protection cover, then gently screw the lens into the lens interface of the camera and make it in place. For the automatic aperture lens, the control line of the lens should also be connected to the automatic aperture interface of the camera. For the electric two variable lens or three variable lens, as long as the lens is rotated in place, it is not necessary to correct its balance status temporarily (it is only necessary to finally correct its balance status after the rear focus adjustment is completed).
3、 Focus adjustment after Wuxi monitoring installation:
Focus adjustment after Wuxi monitoring installation
Back focus, also known as back focus, means that when a standard lens (standard C/CS interface lens) is installed, the imaging of the subject can be exactly on the target surface of the CCD image sensor. Generally, when the camera leaves the factory, the back focus has been properly adjusted. Therefore, it is generally not necessary to adjust the back focus of the camera in applications with fixed focus lens.
In some applications, when the lens focusing ring is adjusted to the limit position, the image still cannot be clear. At this time, you must first confirm whether the lens interface is correct. If it is confirmed to be correct, the back focus of the camera needs to be adjusted. According to experience, in most applications where cameras are equipped with an electric zoom lens, it is often necessary to adjust the back focus of the camera.
4、 Steps of focus adjustment after Wuxi monitor installation:
Steps of focus adjustment after Wuxi monitor installation
(1) Tighten the socket head cap screw and adjust the aperture to the appropriate position.
(2) Install the lens correctly on the camera.
(3) Carry out Zoom Out, which is the opposite of the previous step, to pull the lens back to the Wide state. At this time, the picture will become a panoramic image containing the above close-up object, but at this time, focus adjustment cannot be made (note: if the image at this time becomes blurred, focus adjustment cannot be adjusted), but the next step of back focus adjustment will be prepared.
(4) Loosen the hexagonal socket screw at the front end of the camera used to fix the rear focus adjustment ring, and rotate the rear focus adjustment ring (for cameras without the rear focus adjustment ring, directly rotate the lens to drive the built-in rear focus ring) until the picture is clearest, and then temporarily tighten the hexagonal socket screw
(5) Push the lens to Tele state through Zoom In adjustment, take a close-up of an object 10 m away, and then adjust the focus to sharpen the close-up image.
(6) It usually takes only one or two rounds to adjust the rear focus.
(7) Push the lens to the telescopic state again to see whether the close-up object just taken is still clear. If not, repeat steps a, b and c above.
(8) Open the lens aperture as far as possible (to narrow the depth of field to accurately find the imaging focus).
