scott wrote:
>>> Thermal IR cameras are pretty well established as equipment for e.g. 
>>> police helicopters to search for or track people (particularly at 
>>> night).
>>
>> I'll bet they're damned expensive though. ;-)
> 
> Not *that* expensive, we use one in the lab to see the hot-spots on 
> LCDs.  I don't think it was more than a few times the cost of a good 
> visible-light camera (ie about 3-4K).

Sure, it's not expensive for suitably large definition of "expensive". ;-)

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