> I believe the sophisticated thermal imaging stuff uses a scanning
> bolometer and requires some pretty serious cooling.

Imaging arrays for 10um (8.4um ?) exist. They work better when cooled but
it is also possible to chop the whole picture optically ... I do not know
what system they use in that camera. The Sony camera never did show any
kind of outline of naked people. Its wavelength is far too short for that.
What it did was, it used IR illumination (leds) and removed the ir filter
from the optical path using a special knob. In darkness the IR would go
through certain light clothes (which appear opaque in normal light) and
illuminate the subject directly.  This makes for a fuzzy picture of
whoever is wearing the ir transparent clothes. It only works at a short
distance and in near darkness. There are several consumer cameras that can
do that. Panasonic, Sony and someone else also make them. Do not expect
any miracles. Oh yes, the picture will be black and white (or green and
white). Look for 'Super Nightshot' or such. I think that this is Sony's
brand name but I am not sure.

Peter

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