How to mitigate IR bleed through on Samsung SNV5080R?

[voip-ninja 0]

Hey all. I have two Samsung SNV5080R cameras that have integrated IR. On one of them I noticed that I am starting to see bleed through IR. I took the dome off of the camera and the foam baffle that shields the lens from the IR lamps is still there and in relatively decent shape (there's a bit of deformation but not in the area where the leakage is happening). This camera also has the IR LEDs recessed, so I am surprised it is happening at all.

 

Is there a trick to trying to mitigate this? I cleaned the dome (initially I thought it was condensation in the dome but it is dry) but I was nervous about messing around with the foam ring as I suspect any monkeying around will result in it simply coming off (that was my experience with Vivotek).

 

I suppose as a worst case scenario I can try manually dialing down the brightness of the IR since on the Samsung cams they are adjustable.

[MaxIcon 0]

Before messing with the foam, you might want to make sure it's not environmental reflections back to the dome. Best bet for this is to put it out in the open, pointing straight up into a dark sky. If the IR reflections are still there, it's coming from the inside of the dome. If they're gone, it's coming from something around the camera, reflecting back onto the dome from outside. This takes relocating the camera or painting the area that's reflecting.

[voip-ninja 0]

Before messing with the foam, you might want to make sure it's not environmental reflections back to the dome. Best bet for this is to put it out in the open, pointing straight up into a dark sky. If the IR reflections are still there, it's coming from the inside of the dome. If they're gone, it's coming from something around the camera, reflecting back onto the dome from outside. This takes relocating the camera or painting the area that's reflecting.

 

 

Is that the kind of thing that could happen suddenly with no change to the environment of the camera? This camera has been working fine for months and I haven't changed where it's pointed or anything else for that matter.

[MaxIcon 0]

No, seems unlikely that would shift suddenly. That makes it seem more like foam changing, since cleaning the dome didn't help. I had one camera that developed a film on the lens from something, and cleaning the lens helped, but that doesn't seem too likely here either.

[voip-ninja 0]

I did just think of something that I did that could have affected this. When the weather started to warm up I used a small amount of expanding foam sealant to make sure wasps would not get into the camera body and build a nest.

 

It has been working fine like that for weeks now, but I did trim the foam back a bit and painted it to make it cosmetically better looking and it was not too long after that when I noticed this new problem.

 

I will get a screen cap of what I am seeing and post into this thread.