NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Binocular Convergence and Errors in Judged Distance While Using Head-mounted See-through DisplaysPrevious observations have shown that optical superposition of a physical backdrops at the judged depth of a stereoscopic virtual image moves the judged depth closer to the observer. This effect was more pronounced for slowly moving physical backdrops and was not enhanced when the virtual image was rendered as a flat shaded solid object rather than a open wire-frame. Since this change in rendering making the virtual image more completely occlude the backdrop did not effect its judged depth and since the motion of the backdrop which would have attracted visual attention and binocular convergence did Increase its perceptual displacement, it was concluded that the change In Judged depth was not due to the perceived occlusion. Rather it was concluded to be due to an increase in binocular convergence. An experimental test of this hypothesis using a unobtrusive nonius technique to detect absolute and relative convergence has confirmed the presence of convergence correlated with the magnitude of the change in judged position of this virtual Image. The practical implications of this cause are demonstrated by a second study using monocular, biocular and stereoscopic viewing conditions and the consequences for the design of head-mounted see-through displays for near work are discussed.
Document ID
20020038717
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Ellis, Stephen R.
(NASA Ames Research Center Moffett Field, CA United States)
Bucher, Urs J.
(NASA Ames Research Center Moffett Field, CA United States)
Menges, Brian M.
(NASA Ames Research Center Moffett Field, CA United States)
Null, Cynthia H.
Date Acquired
August 20, 2013
Publication Date
January 1, 1995
Subject Category
Man/System Technology And Life Support
Meeting Information
Meeting: IFAC Man-Machine Systems Symposium
Location: Boston, MA
Country: United States
Start Date: June 27, 1995
End Date: June 29, 1995
Sponsors: International Federation of Automatic Control
Funding Number(s)
PROJECT: RTOP 199-06-30
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Available Downloads

There are no available downloads for this record.
No Preview Available