I dont understand this!

JOINDVR · **Joined:** Jul 2007 **Posts:** 534 **Location:** Norway

Hi!

I have enclosed 2 images for showing this issue.

When the IR leds go on, the picture gets grey, and we can't see anything, the same camera model is also in use other places working ok, but not on this specified location.

Any ideas? Any at all?

Best Regards

JD

Erron S. · **Posted:** Wed Dec 31, 2008 12:27 pm

It looks to me that the polycarbonate lens has begun to degrade and is now not passing the IR light through. There are a number of IR cameras that use 2 seperate lenses on the housings because of this. That's my best guess anyway...

JOINDVR · **Joined:** Jul 2007 **Posts:** 534 **Location:** Norway

This was not a bad idea, as you can see from one of the pictures! You can see the sea, I dont know if the glass/plastic/polycarbonate can react on salt crystals form winds carrying some sea water.

Also customer could have washed it with some liquids that could also have a negative effect.

JD

Erron S. wrote:

It looks to me that the polycarbonate lens has begun to degrade and is now not passing the IR light through. There are a number of IR cameras that use 2 seperate lenses on the housings because of this. That's my best guess anyway...

Scruit · **Joined:** Nov 2006 **Posts:** 580

Also looks like a weatherproof camera with a bad seal - moisture condensing inside the glass. When it warms up the condensation evaporates again.

rapid · **Posted:** Wed Dec 31, 2008 2:45 pm

Cameras needed to be focused at night with the IR on. If you've changed the lens during the install you'll need to do this.

Once this is done, the picture will be great during the day.

Scruit · **Joined:** Nov 2006 **Posts:** 580

rapid wrote:

Cameras needed to be focused at night with the IR on. If you've changed the lens during the install you'll need to do this.

Once this is done, the picture will be great during the day.

I got this effect on weatherproof bullets where the focus was set from the factory. The picture was great at night when it was was dry, but when it was wet the lens would get condensation. After replacing the rubber o-ring (raiding the A/C o-ring set in my workshop!) is was fine in the wet too.

scorpion · **Posted:** Wed Dec 31, 2008 5:25 pm

I would go with the idea that you have a condensation problem.

I also notice that you do not have enough IR going out to the area that you are viewing.

Can you put some silica pack inside of the cameras?

JOINDVR · **Joined:** Jul 2007 **Posts:** 534 **Location:** Norway

scorpion wrote:

I would go with the idea that you have a condensation problem.

I also notice that you do not have enough IR going out to the area that you are viewing.

Can you put some silica pack inside of the cameras?

That one is already tried!

Thanks! :-)

JD

Scruit · **Joined:** Nov 2006 **Posts:** 580

JOINDVR wrote:

scorpion wrote:

I would go with the idea that you have a condensation problem.

I also notice that you do not have enough IR going out to the area that you are viewing.

Can you put some silica pack inside of the cameras?

That one is already tried!

Thanks! :-)

JD

What type of cameras are they? Can you post a picture of the camera itself?

JOINDVR · **Joined:** Jul 2007 **Posts:** 534 **Location:** Norway

Yes how stupid off me! Here is a link too the camera:
CNB-1700P

Scruit wrote:

JOINDVR wrote:

scorpion wrote:

I would go with the idea that you have a condensation problem.

I also notice that you do not have enough IR going out to the area that you are viewing.

Can you put some silica pack inside of the cameras?

That one is already tried!

Thanks! :-)

JD

What type of cameras are they? Can you post a picture of the camera itself?

[url][/url]

kensplace · **Joined:** May 2006 **Posts:** 1153 **Location:** UK

Looks like condensation to me also, it looks very cold out there with that snow, the IR comes on, the leds get warm, condensation forms...
What happens if you watch the footage back, does the effect form slowly?

JOINDVR · **Joined:** Jul 2007 **Posts:** 534 **Location:** Norway

I am not sure about this, if I have time tomorrow I will log on when it start to get less light tomorrow.

JD

kensplace wrote:

Looks like condensation to me also, it looks very cold out there with that snow, the IR comes on, the leds get warm, condensation forms...
What happens if you watch the footage back, does the effect form slowly?

I dont understand this!

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