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Proceedings Paper

Hyperstereopsis in night vision devices: basic mechanisms and impact for training requirements
Author(s): Anne-Emmanuelle Priot; Sylvain Hourlier; Guillaume Giraudet; Alain Leger; Corinne Roumes
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Paper Abstract

Including night vision capabilities in Helmet Mounted Displays has been a serious challenge for many years. The use of "see through" head mounted image intensifiers systems is particularly challenging as it introduces some peculiar visual characteristics usually referred as "hyperstereopsis". Flight testing of such systems has started in the early nineties, both in US and Europe. While the trials conducted in US yielded quite controversial results, convergent positive ones were obtained from European testing, mainly in UK, Germany and France. Subsequently, work on integrating optically coupled I2 tubes on HMD was discontinued in the US, while European manufacturers developed such HMDs for various rotary wings platforms like the TIGER. Coping with hyperstereopsis raises physiological and cognitive human factors issues. Starting in the sixties, effects of increased interocular separation and adaptation to such unusual vision conditions has been quite extensively studied by a number of authors as Wallach, Schor, Judge and Miles, Fisher and Ciuffreda. A synthetic review of literature on this subject will be presented. According to users' reports, three successive phases will be described for habituation to such devices: initial exposure, building compensation phase and behavioral adjustments phase. An habituation model will be suggested to account for HMSD users' reports and literature data bearing on hyperstereopsis, cue weighting for depth perception, adaptation and learning processes, task cognitive control. Finally, some preliminary results on hyperstereopsis spatial and temporal adaptation coming from the survey of training of TIGER pilots, currently conducted at the French-German Army Aviation Training Center, will be unveiled.

Paper Details

Date Published: 18 May 2006
PDF: 11 pages
Proc. SPIE 6224, Helmet- and Head-Mounted Displays XI: Technologies and Applications, 62240N (18 May 2006); doi: 10.1117/12.669332
Show Author Affiliations
Anne-Emmanuelle Priot, Institut de Médecine Aérospatiale du Service de Santé des Armées (France)
Sylvain Hourlier, Institut de Médecine Aérospatiale du Service de Santé des Armées (France)
Guillaume Giraudet, ESSILOR R&D Vision (France)
Alain Leger, THALES Aerospace (France)
Corinne Roumes, Institut de Médecine Aérospatiale du Service de Santé des Armées (France)

Published in SPIE Proceedings Vol. 6224:
Helmet- and Head-Mounted Displays XI: Technologies and Applications
Randall W. Brown; Peter L. Marasco; Clarence E. Rash; Colin E. Reese, Editor(s)

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