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Monitoring probe 3.6,6,8 mm lens and other functions, such as effective distance, visual range and so on

Monitoring probe 3.6,6,8 mm lens and other functions, such as effective distance, visual range and so on

Answer:

The lens is equivalent to the human eye lens, if there is no lens, the human eye can not see any objects; if there is no lens, then the camera output image is a vast expanse of white, no clear image output, which with our home camera and camera principle Is consistent. When the human eye can not stretch the lens to the normal position, that is, people often say myopia, the front of the scene becomes blurred; camera and lens with a similar phenomenon, when the image becomes unclear , You can adjust the camera's back focus, change the CCD chip and the lens reference plane distance (equivalent to adjust the position of the human eye lens), you can blur the image becomes clear.
The proportion of the lens in the cost of the camera is about 20%, is an important part of the camera. And the camera from the high-end to the low end of the complete product chain corresponds to the CCTV lens also formed from the upscale to mid-range to low-end complete product chain, the price from tens of dollars to several hundred dollars, a few hundred dollars to a few thousand dollars Should be comprehensive. Profit level is also very different, commonly used single board machine lens, the profit is very low; the higher the technical content, the more advanced the function of the lens, the greater the profits.
Camera lens selection is one of the most critical elements of the video surveillance system project. Its quality (index) directly affects the overall machine index of the camera and the quality of the whole project, but also related to the project cost. Thus, the camera lens in the closed-circuit monitoring system is very important role. Engineering designers and construction workers should always deal with the lens. Designers should be based on object distance, image size calculation lens focal length, the construction staff often on-site debugging, part of the lens is to adjust to the best condition.

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