Here are some tips on how to resolve the IR reflection issue on dome cameras.
This problem is caused by Infrared light reflection or IR Bleeding. There are many possible reasons cause IR reflection, including:
- Poor contact between the foam gasket ring and dome cover.
- Nearby objects in the environment that reflect IR light.
- Dust, wet, moist on the plastic dome cover.
Foam gasket ring problem.
The most severe case of IR Reflection is caused by the foam gasket ring not being firmly pressed against the camera dome. This will create a “halo” effect.
- To minimize the chance of IR light reflection into the lens, please make sure that the dome bubble is sitting snug against of the foam ring.
Please note, that upon good contact with the dome cover, the foam gasket ring will appear to be squashed a little bit.
Nearby objects and barriers
Nearby objects and barriers are another possible cause of “Foggy” night images.
- To avoid this situation:
-
- Avoid installing the cameras in tight corners.
- Use wall mount brackets to offset the cameras from walls and close surfaces.
- Try to rotate the camera as much away from background surfaces as possible
- Make sure plants/vegetation are clear of the near Field of View. Plant leaves are highly reflective
Dust and moisture on camera cover.
Dirt and moisture on a dome camera can also cause IR “bleeding” and poor night vision image. Avoid touching the dome during the installation and try to keep the protective film on the dome unit the very end. Touching the dome cover creates grease stains/spots on the bubble, which create blur. These may not affect the daytime image but will immediately be an issue with nighttime IR images.
When it comes to cleaning the domes, clean with a lint-free non-abrasive cloth” and never use harsh chemical agents/detergents. Products such as acetone, alcohol, and household glass cleaners can also damage lens coatings..
If all these suggestions have been exhausted, potentially a Speco intensifier camera may be a better solution. Note: For an intensifier camera to work correctly, there must be some ambient lighting in the area.
Initial Publish Date: April 5th, 2024
Published by: Philip Benati, Tier 2