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Scorpion Hybrid Optical-based Inertial Tracker (HObIT)

Robert Atac and Eric Foxlin
"Scorpion hybrid optical-based inertial tracker (HObIT) ", Proc. SPIE 8735, Head- and Helmet-Mounted Displays XVIII: Design and Applications, 873502 (May 16, 2013); doi:10.1117/12.2012194; http://dx.doi.org/10.1117/12.2012194

Copyright 2013 Society of Photo-Optical Instrumentation Engineers

Thales Visionix has developed a new helmet tracker based on a hybrid inertial optical approach.  It uses the inside-out concept of the InterSense VisTracker technology, which has been acquired by Thales Visionix, upgraded with a tiny high-performance NavChip Inertial Measurement Unit (IMU).  A unique feature of the tracker is that there is no aircraft mounted equipment.  A group of small circular barcode-like fiducial stickers are placed on the interior surface of the cockpit.  The tracker allows operation in both hybrid inertial/optical and inertial-only modes, which it seamlessly switches between as the pilot’s helmet goes in and out of the optical tracking zone.  This paper describes the tracker, its features and performance.

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