Patent ID: 8031227

Claim:
A position tracking system comprising: an infrared-sensitive device that generates signals in response to detected infrared light in a field of view of said infrared-sensitive device; a processor responsive to said signals generated by said infrared-sensitive device for determining a position of the detected infrared light with said processor generating tilt and pan signals based on said position, wherein said processor determines said position of the detected infrared light in a two-dimensional coordinate image plane based on said signals and determines a distance of said position from a set point in the two-dimensional coordinate image plane; a visible-light video camera for recording visible light within the same field of view as the infrared-sensitive device; a tilt and pan mechanism that moves said visible-light video camera in response to said tilt and pan signals from said processor; and an active infrared light-emitting device including a loop having at least two infrared light-emitting elements disposed along said loop on opposite sides thereof and a control box disposed in said loop in electrical communication with said infrared light-emitting elements for providing a constantly unimpeded viewing channel between said infrared-sensitive device and at least one of said elements when said loop is disposed around an object that rotates relative to said infrared-sensitive device; wherein said loop is further defined as necklace or accessory to be placed around a person's waist, neck, or other appendage.