Mold inspectors point them at walls to find moisture. Homeland Security is using them for border control. Marines have them mounted under Apache attack helicopters to spot insurgents in the dark. Many uses exist for infrared cameras, around since the 1960s. They convert tiny differences in heat radiation into electronic signals that can then be portrayed as a still or moving image. Even so, infrared camera systems are still expensive playthings for pros, costing between $3,000 and $1.2 million.
Someday, however, they will be cheap enough for every car or home. That prospect thrills Earl Lewis, the chief executive of Flir Systems, the world's biggest stand-alone maker of infrared cameras.
Full story from Forbes