Apparently some researchers have decided that they can make glass impervious to older IR scanners.

Boffins in the States say they have designed a “glass cloak” which renders objects within it invisible in the infrared spectrum.

Prof Elena Semouchkina and her colleagues developed the “cloak”, which reportedly bends micron wavelengths around its interior. Micron-length waves are in the near infrared, the part of the electromagnetic spectrum used by ordinary night-vision goggles.

I foresee a bonanza of half baked dope growers trying their hardest to get this working around their attics so that the police helicopter can’t see their heat lamps at work. They’ll not think about the utility company noticing the drain somewhere, but they’ll think they’re safe from the eeeeevil eye in the sky…