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Proceedings Paper

Effects of aircraft windscreens and canopies on HMT/D aiming accuracy: II
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Paper Abstract

Modern fighter aircraft windscreens and canopies are typically made of curved, transparent plastic for improved aerodynamics and bird-strike protection. Since they are curved these transparencies often refract light in such a way that a pilot looking through the transparency will see a target in a location other than where it actually is. This effect has been known for many years and methods to correct the aircraft head-up display (HUD) for these angular deviations have been developed and employed. The same problem occurs for helmet-mounted displays (HMDs) used for target acquisition. However, for this application, correction of these errors is more difficult due to the fact the pilot can look through any part of the transparency instead of being constrained to just the forward section as in the case of the HUD. To determine the potential impact of these refractive errors on HMDs six F-15 windscreens and four F-15 canopies were measured from twelve different possible eye positions and a wide range of azimuth and elevation angles. These measurements were then used to develop 'best fit' curves that could be used to partially correct for the refractive effects of the transparencies.

Paper Details

Date Published: 18 June 1997
PDF: 8 pages
Proc. SPIE 3058, Head-Mounted Displays II, (18 June 1997); doi: 10.1117/12.276662
Show Author Affiliations
H. Lee Task, Air Force Armstrong Lab. (United States)
Vincent M. Parisi, Logicon Technical Services, Inc. (United States)

Published in SPIE Proceedings Vol. 3058:
Head-Mounted Displays II
Ronald J. Lewandowski; Loran A. Haworth; Henry J. Girolamo, Editor(s)

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