1. An iris imaging system, comprising: at least one light source configured to illuminate an iris with a spectrum of light; and at least one image capturing device comprising at least one of an indium-gallium-arsenide, a lead sulphide and a lead selenide based detector, the at least one image capturing device configured to: capture an image of the iris via light reflected from the iris at the spectrum; and provide a signal representing one or more features of the iris in response to the light reflected from the iris.