Tracking systems

VICON 460 system
It is an optical tracking system for the motion capturing that uses optical cameras whose resolution is of 1280 X 1024 pixels. In particular, the system is used for the acquisition of human movements. These acquisitions may be used in real-time where the signals are directly used by the virtual reality application, or may be used in subsequent elaborations.
www.vicon.com

A.R.T. Tracking System
It is an infrared optical tracking system. It is commonly used for tracking the point of view and the hands of the user who is interacting with the virtual environment. 
www.ar-tracking.de/ 

OptiTrack  V100:R2
The V100:R2 camera offers integrated image capture, processing, and motion tracking in a compact package. The V100:R2 is capable of capturing fast moving objects with its global shutter imager and 100 FPS capture speed. By maximizing its 640 × 480 VGA resolution through advanced image processing algorithms, the V100:R2 can also track markers down to sub-millimeter movements with repeatable accuracy. 
www.naturalpoint.com/optitrack/

Eye Tracking Systems
The Nvisor ST HMD has been integrated with the Viewpoint eye tracker system, which is used for users’ ocular tracking. This technology can be used in training and usability tests applications.
www.arringtonresearch.com

Shape Tape 
It is a 6 DOF input device, based on sensors in optical fibres that can detect flexion and/or torsion. The system provides rather precise information on the position and orientation of the tape when it is freely moved in space, or when it is in contact with a surface. It is used for curve and surface modelling, or for detecting complex shapes in real time.
www.measurand.com

Shape Hand Plus
This system consists of a sensorized glove that allows the acquisition of the movements of the user’s arm, hands and fingers. 
www.measurand.com