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Hi All,


I'm working on a low cost "exhibit" (too strong a word) made of vinyl 
posters that show  images of astronomical objects. I want to hide small 
point sources of IR behind the posters so that people could detect them 
with an IR camera. 
(I work at a radio astronomy observatory -- we're trying to draw some 
analogies to radio astronomy)

Have played with christmas lights (painted black), and they work but I'm 
afraid of the heat. Would they damage the vinyl over an 8 hour day?

IR LEDs operate at near IR wavelengths and  I doubt they'll show up. 
These FLIR thermacams work in the mid IR range.

Any ideas?

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