posted on Nov, 10 2008 @ 04:56 AM
I think the original poster may have been thinking of passive infra red technology, they don't need external infra red illumination lamps, the latest
military sensors used are sensitive enough to image the IR being emitted by the objects themselves. But these military based PIR (Passive Infra Red),
cameras can be bought by civilians, the only problem is cost, they start in the tens of thousands of dollars. If you are wealthy and want the best
system to image objects in the sky at night, these cannot be beat. They only see in infra red, bright blinding lights show up as tiny glare free
points of black, so a typical night sighting of a blindingly bright UFO could almost certainly be seen clearly.