1 October 1990 Head-tracking accuracy in view of boresighting and parallax compensation
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Abstract
Independent of the technology used Helmet Mounted Displays in conjunction with Head Tracking Systems (HTS) enable the human operator to pin-point targets by simply looking at them. But HTS accuracy may suffer from a variety of errors inherent with the system which must be considered when aiming at an accuracy of O,l or even better. The HTS set normally consists of - a Display Unit (DU) - a Helmet Mounted Display (HMD) - a Line-of-Sight Locator (LOSL) - a Symbol Generator (SG) Such a system shall have optimum performance while specified as follows: - DU : 800 lines (from 875 Line-Standard) - HMD : wide angle 8O - LOSL : accuracy O.1 What accuracy can be gained when boresighting or additional parallax errors between LOS/HMD and remotely mounted sensors like laser pointer, video or FUR devices are considered? Whereas military boresighting devices may have an accuracy of about O.OO5,standard backsight/foresight aiming by an operator will only reach O.1 due to hand-motion. The latter results in an offset of 5 m when the target is at a distance of 2900 m.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Walter E. Axt, Walter E. Axt, Ernst-August Mueller, Ernst-August Mueller, } "Head-tracking accuracy in view of boresighting and parallax compensation", Proc. SPIE 1290, Helmet-Mounted Displays II, (1 October 1990); doi: 10.1117/12.20966; https://doi.org/10.1117/12.20966
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