Posted by blackhawk
In total darkness however ambient night vision is useless. Long wave IR devices use ambient heat to image. FLIR is the ticket plus they detect people in the open easily. FLIR systems are cheaper now and many don't require cryogenic cooling to operate. These may be suitable: http://www.flir.co.../content/?id=66928
|
But if the majority of the structure/tunnel is the same temp, FLIR won't show crap since it is a temperature gradient imager.
That said, if you get an IR module (TNVC Da Torch, etc) your ambient night vision work, it'll just be reliant on the IR module.