| 摘要 |
An optical tracker system for determining the sight-line of a pilot within a cockpit. The system has at least two light sources and one photodetector mounted in the cockpit, and one light source and one photodetector mounted on the pilot's helmet. Electrical signals from the photodetectors uniquely establish the position and orientation of the pilot's helmet. When a helmet attached sight is included in the system the signals indicate the pilot's line-of-sight.
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