Thanks but if it's only sensitive to 3000K how does it image anything in
the normal world?
Chuck Norcutt
Ralf Loi wrote:
> <<
>> Can IR film help me here? I've never had any desire to use IR film for
>> anything but have considered that it might point out the egress points
>> if not the ingress points. But maybe it's totally impractical. Or maybe
>> it can only show how successful I might have been in plugging holes
>> found the hard way by showing before and after shots.
>
> I very much doubt it. Normal IR film is sensitive to wavelengths just
> below visible, which is a long way from household temperature thermal
> radiation.
>
> That's right. Normal IR film is sensitive up to around 1 micron, and that
> wavelenght is the peak for a blackbody of around 3000 degree Kelvin.
> The house should be in the range of 300 degree K, so you need to see in
> the range of 10 micron. For reference, visible light is from 0.4 to 0.8
> micron.
>
> Ralf Loi
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