Problems with new NV set up

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snoopy
Posts: 2629
Joined: 22 Jun 2012, 23:22
Location: NER NER LOL stoke on trent

Re: Problems with new NV set up

Post by snoopy » 07 Mar 2013, 00:14

looks like check the ir with another camera from where i'm sitting..if it gives similar results it'll be the IR (as long as the other camera isnt a day cam only).

failing that it is try another ir sourse, even a piddly cctv cam 'board'.
'who is that masked man? its the kemosabby der..the bloody injun tells you every week!'

jacko61
Posts: 14
Joined: 01 Mar 2013, 22:11
Location: Dumfries

Re: Problems with new NV set up

Post by jacko61 » 07 Mar 2013, 21:26

thanks, will keep on tinkering for now but seems like the Watec 902H gets a good write up - might have to start saving!

faisal
Posts: 101
Joined: 05 Feb 2012, 14:39
Location: london

Re: Problems with new NV set up

Post by faisal » 08 Mar 2013, 12:32

snoopy
if you shine your ir into the camera it should blair out white.. if you can just see the torch its eather got one hell of an IR block filter or it is only 0.1lux.

Did you buy the actual KT&C camera or the copy?
If you can see the LED image your torch is working fine. but does you screen go total white out when you point torch to the camera??
I still suspect that your IR filter is causing the problem. If you do manage to remove all the glass covering the CCD you will notice daytime colours will go funny and night time performance will increase dramatically,otherwise the camera has got a problem.

Sorry if you already know this.
On the IR corrected board lenses usually there is a red coloured glass towards the side which goes on the camera to view daytime colours properly. http://www.stockoptics.com/board-lenses ... enses.html

and on the IR pass lenses http://www.stockoptics.com/cctv-board-l ... 850nm.html
there is no glass so the image looks like this http://www.youtube.com/watch?v=7v2i5lSEV0Q

If you want to experiment I can lend you my lens you just pay the postage bothways, or you can buy directly from the link above, go for the 16mm one instead of 12mm.

Cheers
Faisal

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AirRifleSport
Posts: 1529
Joined: 04 Dec 2012, 16:32
Location: Oxfordshire

Re: Problems with new NV set up

Post by AirRifleSport » 08 Mar 2013, 13:06

faisal wrote:
snoopy
if you shine your ir into the camera it should blair out white.. if you can just see the torch its eather got one hell of an IR block filter or it is only 0.1lux.

Did you buy the actual KT&C camera or the copy?
If you can see the LED image your torch is working fine. but does you screen go total white out when you point torch to the camera??
I still suspect that your IR filter is causing the problem. If you do manage to remove all the glass covering the CCD you will notice daytime colours will go funny and night time performance will increase dramatically,otherwise the camera has got a problem.

Sorry if you already know this.
On the IR corrected board lenses usually there is a red coloured glass towards the side which goes on the camera to view daytime colours properly. http://www.stockoptics.com/board-lenses ... enses.html

and on the IR pass lenses http://www.stockoptics.com/cctv-board-l ... 850nm.html
there is no glass so the image looks like this http://www.youtube.com/watch?v=7v2i5lSEV0Q

If you want to experiment I can lend you my lens you just pay the postage bothways, or you can buy directly from the link above, go for the 16mm one instead of 12mm.

Cheers
Faisal
I Faisal,
I have a spare board camera which I decided to experiment with. :) So, a couple of days ago I tried to remove the IR filter from the CCD. I say tried... in the end I went heavy on it... used the Dremel and cut the glass out. It was impossible to remove it otherwise| :lol:
I chopped well into the square holder and I hope I did not cut any needed connection but I can't tell if it works at the moment because I am waiting for some tiny connectors for +, -, and Video to go into the 3 pin socket, arriving from... where else? China! Would you say that the camera would work without any glass on the CCD? If it would then I will see if adding a small plastic IR pass filter (Black) I will manage to protect the CCD from dust. It did have plenty on it while cutting the glass out but the rifle filling probe came handy blowing it out. :lol:
...the doctor said that I need to do gentle exercise... I said to him that I already did... trigger squeezing!

jacko61
Posts: 14
Joined: 01 Mar 2013, 22:11
Location: Dumfries

Re: Problems with new NV set up

Post by jacko61 » 08 Mar 2013, 13:48

Thanks Faisal

I knew about the small square IR filter but wasnt aware that some lenses also have filter in too.
Will check when I get home and see if thats the problem.

terry1001
Posts: 981
Joined: 27 Aug 2012, 09:30
Location: Ipswich, Suffolk

Re: Problems with new NV set up

Post by terry1001 » 08 Mar 2013, 14:27

AirRifleSport wrote:
faisal wrote:
snoopy
if you shine your ir into the camera it should blair out white.. if you can just see the torch its eather got one hell of an IR block filter or it is only 0.1lux.

Did you buy the actual KT&C camera or the copy?
If you can see the LED image your torch is working fine. but does you screen go total white out when you point torch to the camera??
I still suspect that your IR filter is causing the problem. If you do manage to remove all the glass covering the CCD you will notice daytime colours will go funny and night time performance will increase dramatically,otherwise the camera has got a problem.

Sorry if you already know this.
On the IR corrected board lenses usually there is a red coloured glass towards the side which goes on the camera to view daytime colours properly. http://www.stockoptics.com/board-lenses ... enses.html

and on the IR pass lenses http://www.stockoptics.com/cctv-board-l ... 850nm.html
there is no glass so the image looks like this http://www.youtube.com/watch?v=7v2i5lSEV0Q

If you want to experiment I can lend you my lens you just pay the postage bothways, or you can buy directly from the link above, go for the 16mm one instead of 12mm.

Cheers
Faisal
I Faisal,
I have a spare board camera which I decided to experiment with. :) So, a couple of days ago I tried to remove the IR filter from the CCD. I say tried... in the end I went heavy on it... used the Dremel and cut the glass out. It was impossible to remove it otherwise| :lol:
I chopped well into the square holder and I hope I did not cut any needed connection but I can't tell if it works at the moment because I am waiting for some tiny connectors for +, -, and Video to go into the 3 pin socket, arriving from... where else? China! Would you say that the camera would work without any glass on the CCD? If it would then I will see if adding a small plastic IR pass filter (Black) I will manage to protect the CCD from dust. It did have plenty on it while cutting the glass out but the rifle filling probe came handy blowing it out. :lol:
I hope you were more successful than I was, I did exactly what you did and the sensor is now FUBAR. From what I have seen most of the filters in front of the sensors are there to protect them and to provide colour correction rather than being an ir cut filter. Obviously some may be but if the camera is sold with auto change colour/mono at low light levels it is not likely to be unsuitable for use with ir. It would seem that ir cut filters can be removed fairly easily, if it doesn't come off immediately I would leave it in place.
The sensors are extremely delicate and I expect that anything hot or with a static charge or sharp would cause permanent damage. Hopefully you will have had more luck than me although my camera was a spare as well.

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AirRifleSport
Posts: 1529
Joined: 04 Dec 2012, 16:32
Location: Oxfordshire

Re: Problems with new NV set up

Post by AirRifleSport » 08 Mar 2013, 14:47

Obviously I was prepared to loose the board... And with regards to heat... I applied loads of it, with my soldering iron on the glass. I thing it is a "goner" but I will soon find out. :mrgreen:
...the doctor said that I need to do gentle exercise... I said to him that I already did... trigger squeezing!

terry1001
Posts: 981
Joined: 27 Aug 2012, 09:30
Location: Ipswich, Suffolk

Re: Problems with new NV set up

Post by terry1001 » 08 Mar 2013, 14:59

AirRifleSport wrote:Obviously I was prepared to loose the board... And with regards to heat... I applied loads of it, with my soldering iron on the glass. I thing it is a "goner" but I will soon find out. :mrgreen:
That sounds very familiar! About 1% chance it still works.

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