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Proceedings Paper

Biocular image misalignment tolerance
Author(s): Melvyn E. Kalich; Clarence E. Rash; Corina van de Pol; Terri Lynn Rowe; Lisa M. Lont; R. David Peterson
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Paper Abstract

Biocular helmet-mounted display (HMD) design flexibility and cost are directly related to image misalignment tolerance standards. Currently recommended tolerance levels are based on highly variable data from a number of studies. This paper presents progress of an ongoing study to evaluate optometric measures sensitive to misalignment in partial-overlap biocular optical systems like that proposed for the Comanche RAH-66 helicopter helmet integrated display sighting system (HIDSS). Horizontal divergent and relative vertical misalignments (offsets) of see-through biocular symbology viewed against a simulated daytime background were chosen for this study. Misalignments within and just beyond current tolerance recommendations were evaluated using pre, pre and post, and during measures of visual performance. Data were obtained from seven experimental and four control subjects. The diplopia responses from experimental and control subjects were essentially the same. However, accommodative facility showed a rate decrement following exposure to both types of misalignment. Horizontal heterophorias showed definite post-misalignment increases. Subject responses to questionnaires universally indicated increased adaptation to (ease with) visual tasks over the testing period.

Paper Details

Date Published: 8 September 2003
PDF: 12 pages
Proc. SPIE 5079, Helmet- and Head-Mounted Displays VIII: Technologies and Applications, (8 September 2003); doi: 10.1117/12.485926
Show Author Affiliations
Melvyn E. Kalich, U.S. Army Aeromedical Research Lab. (United States)
Clarence E. Rash, U.S. Army Aeromedical Research Lab. (United States)
Corina van de Pol, U.S. Army Aeromedical Research Lab. (United States)
Terri Lynn Rowe, U.S. Army Aeromedical Research Lab. (United States)
Lisa M. Lont, U.S. Army Aeromedical Research Lab. (United States)
R. David Peterson, U.S. Army Aeromedical Research Lab. (United States)


Published in SPIE Proceedings Vol. 5079:
Helmet- and Head-Mounted Displays VIII: Technologies and Applications
Clarence E. Rash; Colin E. Reese, Editor(s)

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