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 Post subject: Re: Tips for mounting cameras behind glass?
PostPosted: Fri May 30, 2014 9:03 am 
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I agree with TipoFloe. There isnt much you can really do, as the glass is naturally reflective. And at night time, the LED sometimes reflect back, giving no image at all. Best to always drill a hole so you can mount the camera outside.


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 Post subject: Re: Tips for mounting cameras behind glass?
PostPosted: Fri May 30, 2014 1:55 pm 
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Why spend on a PTZ? there are perfectly good indoor zoom cameras available with motorized zoom and auto focus
Why do you need infrared, are you spying on someone? Whats wrong with common PIR floods? They drive criminals away and startle would be criminals.

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 Post subject: Re: Tips for mounting cameras behind glass?
PostPosted: Sat May 31, 2014 12:03 am 
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mimilovell wrote:
I agree with TipoFloe. There isnt much you can really do, as the glass is naturally reflective. And at night time, the LED sometimes reflect back, giving no image at all. Best to always drill a hole so you can mount the camera outside.


That's why you have infra-red on the camera turned off and use external ir instead. You can also use much more ir that way and position it in the most optimal ways.


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 Post subject: Re: Tips for mounting cameras behind glass?
PostPosted: Sat May 31, 2014 12:14 am 
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Numb-nuts wrote:
Why spend on a PTZ? there are perfectly good indoor zoom cameras available with motorized zoom and auto focus
Why do you need infrared, are you spying on someone? Whats wrong with common PIR floods? They drive criminals away and startle would be criminals.


PIR's are great. but having a a large flood light turn on when a PIR detects something, not so great all the time under all circumstances.

In some neighborhoods, the kids love, did it say love? Yep, love lights that turn on bright when you walk by them. They love them so much, they actually go on your property more to set them off, and see if they can get the homeowner annoyed enough to come out and chase them, etc. Seen it happen in many places.

Also, sometimes, having a light come on in certain neighborhoods can really annoy other neighbors. It also is not great for light pollution. http://www.darksky.org/

It's extremely tacky under certain circumstances. but yeah, it does scare some people away, but attracts others. The miscreants, the dreads, the others.


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 Post subject: Re: Tips for mounting cameras behind glass?
PostPosted: Mon Aug 18, 2014 5:06 am 
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I have been monitoring my driveway with an internal IP camera behind a double-glazed window. I have disabled the IR leds, so as to avoid any window glare, and have illuminated my driveway with an external IR spotlight with a range of 10 metres - which is the length of the driveway. Whilst this is fine during the day, the night image is extremely poor, presumably because a lot of the IR light is being blocked by the double-glazing. In addition, the driveway is 45 degrees to the house so I cannot get the camera right up to the window, although it is in a spare room that is unlit.

If I were to replace the 10m spotlight with one that has a range of 45 metres, would I see any significant improvement in the image? At present, I can barely make out the shape of the car on the driveway. With the window open, the image is much better so it does seem that the window blocks most of the IR light. Clearly, the best option would be to have an external camera, but I was hoping to have the camera inside so as not to annoy neighbours etc.

Thanks for any advice.


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 Post subject: Re: Tips for mounting cameras behind glass?
PostPosted: Mon Aug 18, 2014 3:28 pm 
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Soundy wrote:
1. Don't do it.
2. Don't do it.
3. Especially don't do it if the camera has IR.
4. DON'T DO IT.


I have to double agree with this.

By mounting it indoors in a dormer, you will effectively cut down the range of view the camera has, you could probably cover all that with two mini zoom cameras. The best place to install a PTZ on a building is on an outside corner where its range is about 270 degrees in the horizontal plane. Putting inside like you want will reduce that range to less than 180degrees and probably ruin the view from that dormer completely and for what? It'll be rubbish I promise you. IF A CLIENT OF MINE WANTED ME TO DO THAT I'D DEMAND THEY SIGN A DISCLAIMER FIRST.

and all this is quite apart from the IR isue which you cannot cheat physics. Glass will reflect the IR back and you will need some space to allow a PTZ to move otherwise whats the point of having one, you can't outsmart science and the further away from the glass the more IR light will be reflected direct into the lens

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 Post subject: Re: Tips for mounting cameras behind glass?
PostPosted: Wed Aug 20, 2014 3:14 am 
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Grimbold wrote:
I have been monitoring my driveway with an internal IP camera behind a double-glazed window. I have disabled the IR leds, so as to avoid any window glare, and have illuminated my driveway with an external IR spotlight with a range of 10 metres - which is the length of the driveway. Whilst this is fine during the day, the night image is extremely poor, presumably because a lot of the IR light is being blocked by the double-glazing. In addition, the driveway is 45 degrees to the house so I cannot get the camera right up to the window, although it is in a spare room that is unlit.

If I were to replace the 10m spotlight with one that has a range of 45 metres, would I see any significant improvement in the image? At present, I can barely make out the shape of the car on the driveway. With the window open, the image is much better so it does seem that the window blocks most of the IR light. Clearly, the best option would be to have an external camera, but I was hoping to have the camera inside so as not to annoy neighbours etc.

Thanks for any advice.


Anybody? [-o<


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 Post subject: Re: Tips for mounting cameras behind glass?
PostPosted: Wed Aug 20, 2014 11:40 am 
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Grimbold wrote:
Grimbold wrote:
I have been monitoring my driveway with an internal IP camera behind a double-glazed window. I have disabled the IR leds, so as to avoid any window glare, and have illuminated my driveway with an external IR spotlight with a range of 10 metres - which is the length of the driveway. Whilst this is fine during the day, the night image is extremely poor, presumably because a lot of the IR light is being blocked by the double-glazing. In addition, the driveway is 45 degrees to the house so I cannot get the camera right up to the window, although it is in a spare room that is unlit.

If I were to replace the 10m spotlight with one that has a range of 45 metres, would I see any significant improvement in the image? At present, I can barely make out the shape of the car on the driveway. With the window open, the image is much better so it does seem that the window blocks most of the IR light. Clearly, the best option would be to have an external camera, but I was hoping to have the camera inside so as not to annoy neighbours etc.

Thanks for any advice.


Anybody? [-o<


I'd say you've already got your answer from the above responses.

No matter what, you're best off having the camera outside if its viewing the outside.
If the window material is blocking ir light from the 10meter light source, I don't see how the 45meter source is gonna be better.
Further distance from the light source will be illuminated but the window will still block the same amount of ir light.


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 Post subject: Re: Tips for mounting cameras behind glass?
PostPosted: Wed Aug 20, 2014 12:44 pm 
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But if it can reach out to 45 metres, presumably it is emitting more IR than a spotlight that is designed to reach only 10 metres i.e. it's 'brighter'. To me, that means that there will be more IR to pass through the glass and be picked up by the internal camera. Or doesn't it work that way?


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 Post subject: Re: Tips for mounting cameras behind glass?
PostPosted: Wed Aug 20, 2014 1:48 pm 
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Maybe to a small amount but I'm not sure it'd be much better


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 Post subject: Re: Tips for mounting cameras behind glass?
PostPosted: Thu Jan 18, 2018 3:43 pm 
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Would IR work in front of plastic rather than a glass sheet in front or would it not work in the same way. Or is there some kind of plastic changing colour in the dark so IR works but goes light again once daylight

Would something like this work

https://m.banggood.com/20x30cm-PDLC-Smart-Glass-EGlass-Switchable-Emagic-Electroch-Film-p-1109872.html?gmcCountry=GB&currency=GBP&createTmp=1&cur_warehouse=CN&utm_source=googleshopping&utm_medium=cpc_elc&utm_content=zouzou&utm_campaign=pla-brand-elc2-uk&gclid=CjwKCAiAqIHTBRAVEiwA6TgJw0wH4Jw2mjyY4TWiBhnXPpTSlZ3kUMxc1kUNygpc7OO1AQX9Z6IAQBoCd_EQAvD_BwE


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 Post subject: Re: Tips for mounting cameras behind glass?
PostPosted: Wed Feb 28, 2018 1:08 pm 
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Quote:
Multiple cameras concealed in bird-boxes (unable to be used by birds)


I have two. Hornet hell. imagine a hornet landing on a 1.8 mm wide angle lens, seen on a 52" TV. a hundred times a day. looks like a danged eagle. you have to seal the birdhouse, put a plate or screen around the opening. not difficult, but it's better to do it before the softball sized nest of stingy things shows up.

black towel over the drapes kills reflections


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