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How to Prevent Infrared (IR) Glare on your Security Cameras Before assuming that your night vision security camera is malfunctioning, it is important to preposition the camera or bench test the camera with a known good power supply and short cable to ensure that the camera is functioning properly.
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In the video below we demonstrate the IR glare phenomenon and discuss steps to ensure that it does not happen when you are mounting security cameras. How you mount the camera, whether it be wall or ceiling mounted, needs to be done carefully and tested both in daytime and low light conditions before calling the job complete. More common than anything else, IR glare is caused by improper installation. While these objects may not even be within the cameras field of view, the objects can be close enough to reflect the IR LEDs and cause IR glare. Indoor cameras are usually affected by the items or furniture surrounding them. For outdoor cameras, your biggest enemy is going to be reflective surfaces bodies of water and larger lightly colored surfaces are the most common culprits. While IR glare can certainly be caused by debris on your cameras glass, it’s much more common for it to be caused in other ways. We just touched on it but we’d like to make it a little broader now. Thoroughly clean the glass and remove any of these obstructions and consider the problem solved. Once again, you’ll notice that your low light viewing needs will not be met in a case like this. Similar to other issues you can encounter, this is caused by the IR light reflecting off of these obstructions and bouncing back into the lens. Things such as dirt, dust, and fingerprints on your glass can cause the effect known as Infrared glare. One of the big reasons that plastic film is on the glass is to keep everything else off of it. Once, you’re satisfied with the camera placement and viewing angle, remove the plastic cover and discard it. This film is on the glass for a reason, but it should not be left on the glass after the camera is finished being installed. Most cameras will have a thin plastic protective film over the glass on the camera. You’ll simply need to open the camera and ensure that this ring is in the position that it should be. When the foam ring is not seated flush with the IR board, or base of the lens, it will produce a similar effect on your low light image feed. Having a foam ring be completely missing from a camera is very uncommon, but having a foam ring that isn't seated properly is much more likely. If you find that you’re missing this component, you’ll first want to check to make sure that your camera should in fact have one before moving on to dismantling the camera. The foam ring, while a simple concept, does a perfect job to eliminate this effect. When this happens in a camera, the IR light will reflect off the glass and back into the lens this produces a negative effect that will all but render your camera useless during these low light situations. Glass will reflect Infrared light just like it will reflect any other kind of light. Not every camera will have one, but most of them do. As always, if you have any questions, just leave them in the comments section and we'll be happy to answer them. This short list of common problems people encounter with Infrared should provide you with some finer details to consider while installing your security cameras and potentially troubleshooting at a later date. While this is a magnificent feature to have in a camera, we live in an imperfect world and like everything else, it's not always what we'd like it to be. Unlike true "night vision", Infrared LEDs emit their own source of light instead of using existing sources these LEDs essentially become a spotlight for your camera.
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If you're not familiar with Infrared, it's what grants CCTV security cameras the ability to see in the dark.