BAE Adaptiv infrared camouflage

BAE Systems Adaptiv infrared camouflage technology may be used for a wide variety of platforms since battle-tanks to helicopters and vessels. It uses hexagonal panels to compose a rapidly heated and cooled panel to match the temperature of the surroundings or one of the objects in the library such as a car. It intends to be a countermeasure to infrared missiles and a camouflage against infrared sensors.

More: http://en.wikipedia.org/wiki/Active_camouflage