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Not to hijack the thread but to add a parallel ( for people who know about this stuff )
Been helping some people finding faults in circuit boards by using controlled current feeds and looking for hot spots. One is using a laser thermometer
but it is crude and requires constant moving.
I know a lot of places now use thermal imaging to do this, and the costs are coming down, but it is still horrendous.
I thought that maybe using something like the Astronomik IR pass filters with a scope and webcam etc could replicate them enough to see general areas, but it all comes a cropper when you look at the general IR sensitivity of std astro optimised cameras ( even with the IR filters removed ) in the lower freq.
Has anyone tried this??? know of any cheap cameras with good QE in the IR regions???
Andrew
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