NVIS Laptop / Convertible display
Rugged laptop converts to tablet, has NVIS compatible screen
Night Vision Imaging Systems
Night Vision Imaging Systems (NVIS) and Night Vision Goggles (NVG) allow their users to see in the dark. (Almost – there has to be some light to amplify) Military requirements for search and rescue, night combat, surveillance operations and sniper sights drove the development of these systems, but they are now available to the civilian population for hunting etc. I met a guy in London in about 1996 who was making a fortune selling them to voyeurs who lived near Hyde Park, and wanted to watch what was going on after dark… The first systems were installed in tanks in WWII. Since then they have improved dramatically and have been miniaturized to the extent that they can now be head mounted – night vision goggles (NVG). They work by amplifying a relatively narrow band of the near infra-red and optical spectrum. Indeed the first systems includes powerful infra-red lamps to illuminate the viewing scene. Later generations became more and more sensitive, so much so that the latest systems work fine in starlight.
Why Does the Laptop need to be NVIS compatible?
The backlights for the laptop display, and indeed indicator lamps on the main housing (LEDs!) are blindingly bright when viewed through night vision goggles.
This is not just distracting, it can be deadly. An NVIS compatible computer has narrow bandwidth filter that attenuates the frequencies amplified by the night vision system. So the filter blocks infrared and near infrared light, which means it no longer looks like a searchlight when wearing the NVS goggles. So what does it look like without the goggles on? It looks like a laptop with a very slightly dimmer display than standard.