DIY: an infrared PC camera (thermal camera)

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Obelix
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DIY: an infrared PC camera (thermal camera)




by Obelix » 26/09/09, 10:52

Hello,

For those who do not have two left hands, a very interesting DIY allowing to "see" the results of "good" insulation without spending a thousand and one hundred!
I think it is within the reach of many of us and even if the site is in a foreign language the many photos will help the less gifted!

http://www.hoagieshouse.com/IR/

What do you think ??

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chatelot16
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by chatelot16 » 26/09/09, 14:04

attention it does not make a thermal camera it makes a simple near infrared camera: the scene must be lit by near infrared: if there is no natural lighting we can light by infrared leds, invisible for the eye

but it does not see the thermal emission of the objects


the only way I see accessible to the handyman is the pyroelectric alarm sensor or presence detector: this sensor has only one pixel but it could be mounted on something rotating on 2 axes to scan on 2 axes and have a picture: it will be slower than a camera but sufficient to look for thermal leaks
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by elephant » 26/09/09, 15:50

yeah, yeah! Chatelot has just reinvented television :D
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by chatelot16 » 26/09/09, 16:21

I don't reinvent anything

I make it clear that single cameras that also see near infrared are not thermal cameras

the real thermal camera, bolometer matrix are very expensive

the pyro electric sensor with mechanical scanning is an idea that I will realize one day
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by Flytox » 26/09/09, 22:38

chatelot16 wrote:but it does not see the thermal emission of the objects


Image

Can you decode why we see the veins so well if it is not thermal emission?
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by chatelot16 » 26/09/09, 23:20

we see the colors from red to blue, there are other colors to see at other frequencies: there are things to see near infrared that our view does not see, but it is not thermal emission

if your skin emitted near infrared it would be almost hot enough to emit red: around 500 ° c

to see the thermal emission due to 37 ° it is necessary to look at much lower frequencies which do not even pass through the glass

you need a calcium fluoride lens which is not even transparent to the visible

the lens can also be made of polyethylene like pyro electric detectors
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by elephant » 26/09/09, 23:37

Must do a test at the end of the night .... on a house, we will see

Even if we don't have the quality of thermographic cameras, maybe it's cheap and it can pay off ... :D
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by Flytox » 06/10/09, 22:59

Someone would have a mod to offer the cam to go to see the opposite ... UltraViolet A side?
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by elephant » 06/10/09, 23:57

You have said too much or not enough: what for? :D
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by Christophe » 07/10/09, 09:11

I agree a little with Chatelot, it is for night vision not thermal.

It must work a little in thermal nevertheless ...

We have a night vision telescope (bresser lidl model at 149 euros) with "infrared lighting" if necessary (total darkness), I will test in the middle of winter. In fact it is a light amplifying telescope with infrared option.

Given the rendering of the webcam, I think the sensor is the same type ...
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