Infrared (IR) camera systems for and a method of obtaining infrared images of target subjects are provided. In one embodiment, an IR camera system (10) includes a lens (12), a number of IR pass filters (14), an optical detector (16), a processor (18) mounted on a circuit board (20), a distance sensor...http://www.google.fr/patents/US7477309?utm_source=gb-gplus-shareBrevet US7477309 - Infrared camera system and method