The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 23, 2002
Filed:
Aug. 14, 2000
Christopher T Bartlett, Maidstone, GB;
BAE Systems Electronics Limited, Middlesex, GB;
Abstract
A head tracker system for determining a user's head orientation relative to a datum comprises: a head mounting, preferably a helmet ( ), for attachment to the user's head and a sensor system ( ) for sensing the orientation of the head mounting ( ) relative and the datum. A distinguishable marking ( ) is provided at a first known point fixed relative to the head mounting or a second known point fixed relative to the datum. At the other known point an optical sensor ( ), preferably a video camera, is mounted. The system further comprises processing means ( ) for determining when the marking is within the field of view of the optical sensor and the output of the processing means is used to correct for drift in the sensor system or to provide an independent verification that the system is functioning within preselected tolerances.