Infra-red cameras are used in the LeapMotion controllers. I don't think it is anything special about the spectrum however, coupled with Infra-red lights it's an

Infra-red cameras are used in the LeapMotion controllers. I don't think it is anything special about the spectrum however, coupled with Infra-red lights it's an easy way to cut down on the noise in the comtrollers field of view.