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I dont understand this!
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| JOINDVR |
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Posts: 297
Joined: 08 Jul 2007
Location: Norway
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Posted: Wed Dec 31, 2008 1:03 pm
Post subject: I dont understand this!
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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
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| Erron S. |
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Posts: 80
Joined: 15 Sep 2008
Location: Westminster, Colorado
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Posted: Wed Dec 31, 2008 1:27 pm
Post subject:
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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...
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Erron S.
3xlogic.com
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| JOINDVR |
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Posts: 297
Joined: 08 Jul 2007
Location: Norway
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Posted: Wed Dec 31, 2008 1:42 pm
Post subject: Thanks
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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... |
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| Scruit |
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Posts: 505
Joined: 25 Nov 2006
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Posted: Wed Dec 31, 2008 2:46 pm
Post subject:
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Also looks like a weatherproof camera with a bad seal - moisture condensing inside the glass. When it warms up the condensation evaporates again.
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Scruit
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| rapid |
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Posts: 222
Joined: 06 Nov 2003
Location: Toronto, ON
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Posted: Wed Dec 31, 2008 3:45 pm
Post subject:
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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.
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Cheers.....Rapid
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| Scruit |
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Posts: 505
Joined: 25 Nov 2006
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Posted: Wed Dec 31, 2008 4:39 pm
Post subject:
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| 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.
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Scruit
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| scorpion |
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Posts: 3545
Joined: 26 Mar 2007
Location: Melbourne Florida
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Posted: Wed Dec 31, 2008 6:25 pm
Post subject:
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| JOINDVR |
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Posts: 297
Joined: 08 Jul 2007
Location: Norway
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Posted: Wed Dec 31, 2008 6:36 pm
Post subject:
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| 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
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| Scruit |
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Posts: 505
Joined: 25 Nov 2006
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Posted: Wed Dec 31, 2008 7:47 pm
Post subject:
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| 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?
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Scruit
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| JOINDVR |
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Posts: 297
Joined: 08 Jul 2007
Location: Norway
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Posted: Wed Dec 31, 2008 8:18 pm
Post subject:
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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]
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| kensplace |
Moderator
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Posts: 1036
Joined: 30 May 2006
Location: UK
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Posted: Wed Dec 31, 2008 9:07 pm
Post subject:
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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?
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| JOINDVR |
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Posts: 297
Joined: 08 Jul 2007
Location: Norway
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Posted: Wed Dec 31, 2008 9:14 pm
Post subject:
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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? |
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