The device makes use of infrared light rays to image radiation that is coming from a person’s body. If the person is carrying a metal object such as a gun, it will prevent the rays from reaching the part of the body where the object is. This will result in the appearance of an outline of that object on the scanner.
I like to think a lot of people in the defense and security industries took much of their inspiration from comic book heroes when they were kids; the noble idea of defending the innocent against attacks from villains. And that seems to be the case with BAE Systems’ new battle-bot concept.