At the current time, NVG and thermal goggles use 2 very different tubes to give their certain vision. NVG take the light and amplify it infinitely to see in the dark. Thermal vision is created by CMOS sensors and converts it to a visible image (Like many common cameras). It’s possible to have one tube be one and one be the other and the top being an infrared illuminator. However, true bifocal vision in one set is impossible at this time. Perhaps in the future, I know a company called redshift that’s devolving thermal sensors that are smaller and cheaper. Very interesting stuff.
A side note: The colors shown in Splinter Cell would be put in by equipment to help see the differences. Real IR imaging would be black & white by default and much more common for goggles. What Sam has on his head truly would be tens of thousands of dollars.
eek Damn.
Links:
http://en.wikipedia.org/wiki/Thermal_visionhttp://en.wikipedia.org/wiki/Night_visionhttp://www.redshiftsystems.com/site/ <== Go Here!