Explanation
Lighthouse is a tracking technology developed by Valve that uses laser-emitting base stations to precisely locate VR headsets, controllers, and tracked objects in 3D space. The stations sweep the room with infrared laser beams, and photosensors on the tracked devices detect the timing of these sweeps to calculate their exact position. Lighthouse tracking offers sub-millimeter precision across large play areas and remains the gold standard for professional VR applications.
Real-world example
The HTC Vive base stations that rotate and emit lasers to track your position to the millimeter.
Practical applications
- Ultra-precise tracking: millimeter-level localization of headsets and controllers
- Large play areas: covering multi-meter spaces
- Object tracking: tracking any object equipped with sensors
- Professional use: applications requiring absolute precision
Lighthouse vs other systems
Lighthouse (SteamVR)
- Base stations emit IR laser beams that sweep the room
- Photosensors on headset/controllers detect the laser sweeps
- Extremely precise, no self-occlusion by the headset
Example: HTC Vive, Valve Index with base stations
Constellation (former Oculus)
- IR cameras that see LEDs on the headset
- Outside-in but with active cameras vs passive lasers
- Discontinued in favor of inside-out tracking
Example: Oculus Rift CV1 with its USB sensors
VR scenario
A biomechanics research center uses Lighthouse tracking to capture athletes' movements with sub-millimeter precision. The base stations cover a 10 m x 10 m area, enabling analysis of running, jumping, and technical gestures.
Why it matters in professional VR
- Lighthouse remains the precision benchmark for professional VR tracking
- SteamVR compatibility: works with Valve Index, Vive, and third-party trackers
- Trade-off: more precise but more complex to set up than inside-out tracking