Dispensing Machine Vision Lens Aperture Selection Lens is one of the important components of machine vision. Just like human eyes, the aperture of the lens changes with the intensity of external light. In the night, the aperture needs to be fully turned on, and in bright light, it is reduced accordingly. The aperture controls how much light enters the lens, and the camera produces clear and crisp images. The aperture value is generally expressed as an F value, indicating how large the aperture can be opened. In a low light environment, you must use a lens with a small aperture value, such as F1.0, F1.2, and F1.4. The smaller the aperture value, The more light that can enter the camera CCD through the lens, the better the image is in a dark environment. Similarly, for bright light environments, you may need a large F-number lens, such as the F360 or F560, to ensure that the camera provides a clear and defensible image. Media Facade Lighting,Led Grid Screen Lighting,Flexible Transparent Mesh Lighting,Building Lighting Shen zhen SH LED Technology Co.,Ltd , https://www.pixellightsolutions.com
In an environment where indoor light does not change much, we use manual iris lenses. The installation engineer can adjust the excellent results according to the site conditions.
In the case of changing lighting conditions, multi-use automatic iris lens. In fact, the camera controls the aperture motor to adjust the intensity of light received on the CCD. The camera informs the lens CCD of the amount of light required by the feedback signal. DC drive auto iris has pre-made plugs, the plug directly into the camera's automatic aperture interface machine to work.
When we select the lens, it is important to confirm that the lens has a large range of F values ​​(not just low illumination).
Aperture operation requirements:
When we adjust the monitored image, we must always consider the monitoring center's monitoring purpose guidelines, such as the direction, size, size of the target on the monitor, and the degree of resolution. The following is the classification of monitored objects:
"Monitoring" - monitoring the size of the target object, accounting for 5% of the monitor screen - suitable for surveillance purposes such as monitoring the movement of people, traffic conditions.
"Probing" - Obtained target objects occupy no less than 10% of the monitor screen
"Identification" - The image size on the monitor must not be less than 50% for identification purposes. This size allows us to say "ah, I know him."
"Difference" - As evidence of our video, we recommend the size of the target 120%. That means if we look at people we can tell the details.