Binocular Overlap In A Fiber Optic Helmet Mounted Display
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Binocular Overlap In A Fiber Optic Helmet Mounted Display
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Author : Thomas M. Longridge
language : en
Publisher:
Release Date : 1984
Binocular Overlap In A Fiber Optic Helmet Mounted Display written by Thomas M. Longridge and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with categories.
Target detection, motion detection, and flight performance were compared under conditions of 25 and 45 binocular overlap using only the low resolution background channels of a Fiber Optic Helmet Mounted Display (FOHMD). In experiments 1 and 2, eight experienced fighter pilots viewed aircraft targets which either approached ownship or moved vertically in the field of view, respectively, at various angles of off axis eccentricity. As an additional task, pilots flew the system as an air combat simulator and were required to track, engage, and destroy an airborne target. The results indicated target and motion detection and binocularly displayed targets were superior to that of monocularly displayed targets. There was no significant difference in target detection or motion detection between the two overlap conditions, per se, nor between left and right fields of view. In both overlap conditions, performance was degraded within 5 of the lateral edges of the field of view, and suppression was evident in contralateral fields in the areas of optical frame overlap. However, the latter effects were combined nearer the central viewing area for the 25 deg overlap condition. No significant differences were noted in the supplementary air combat task as a function of overlap, but structured debriefing data indicated loss of target imagery was less of a problem with the larger overlap. It was concluded that greater than 25 deg binocular overlap should be utilized in follow-on systems. (Author).
Visual Perception In The Field Of View Of Partial Binocular Overlap Helmet Mounted Displays
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Author :
language : en
Publisher:
Release Date : 1994
Visual Perception In The Field Of View Of Partial Binocular Overlap Helmet Mounted Displays written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.
Because of limitations in the size of the field-of-view (FOV) available in helmet-mounted displays (HMD) using the full overlap display mode, where the entire FOV is binocular, partial binocular overlaps displays, which can be convergent or divergent, have been proposed. One consequence of this is a perceptual effect known as luning, which is a subjective darkening in the monocular regions of the FOV, which can in some cases cause fragmentation of the FOV into three regions. A concern is, the possible effect on target identification in the monocular regions, particularly in areas affected by luning. We review data we have collected in our binocular vision lab on the effect of display mode one aspects of visual perception. Full binocular overlay, Partial binocular overlap, Helmet-mounted display, Convergent FOV, Divergent FOV, Luning, Dichoptic, Contrast threshold, Binocular occlusion.
Factors Affecting The Visual Fragmentation Of The Field Of View In Partial Binocular Overlap Displays
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Author :
language : en
Publisher:
Release Date : 1994
Factors Affecting The Visual Fragmentation Of The Field Of View In Partial Binocular Overlap Displays written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Air pilots, Military categories.
Helmet Mounted Displays
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Author :
language : en
Publisher:
Release Date : 1992
Helmet Mounted Displays written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Fiber optics categories.
The Effects Upon Visual Performance Of Varying Binocular Overlap
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Author : G. K. Edgar
language : en
Publisher:
Release Date : 1991
The Effects Upon Visual Performance Of Varying Binocular Overlap written by G. K. Edgar and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with categories.
In a helmet mounted display there is a trade-off between the binocular overlap of the images presented to each eye and the total field of view. It is therefore desirable to see whether decreasing the binocular overlap (and thus making possible a larger total FOV) adversely affects performance. This paper reports the results of four experiments examining the effects of different binocular overlaps upon performance on a visual search task, and the factors that may explain any differences in the results obtained with different overlap conditions. The results indicated that performance was poorer in all non-100% overlap conditions, and suggested that this decrement in performance could be explained by the presence of depth boundaries introduced by a disparity between the images presented to each eye.
Helmet And Head Mounted Displays And Symbology Design Requirements
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Author :
language : en
Publisher:
Release Date : 1994
Helmet And Head Mounted Displays And Symbology Design Requirements written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Aeronautical instruments categories.
Optical Tolerances For Alignment And Image Differences For Binocular Helmet Mounted Displays
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Author :
language : en
Publisher:
Release Date : 1986
Optical Tolerances For Alignment And Image Differences For Binocular Helmet Mounted Displays written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.
Reviews the literature on optical alignment and image difference tolerances for binocular devices. Tolerances for vertical and horizontal misalignment and for rotation, magnification and luminance differences are recommended. Recommendations are made for collimation tolerance and for eye relief and exit pupil diameter for helmet-mounted binocular displays. Formulas are derived for magnification difference tolerances for partially and totally overlapping fields of view.
Helmet Mounted Displays Ii
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Author : Society of Photo-optical Instrumentation Engineers
language : en
Publisher:
Release Date : 1990
Helmet Mounted Displays Ii written by Society of Photo-optical Instrumentation Engineers and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Computers categories.
The Effect Of Helmet Mounted Display Field Of View Configurations On Target Acquisition
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Author :
language : en
Publisher:
Release Date : 1999
The Effect Of Helmet Mounted Display Field Of View Configurations On Target Acquisition written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with categories.
Monocular helmet-mounted displays (HMDs) currently are used in the Army's AH-64 Apache helicopter. A partial binocular overlap HMD is slated for use with the Army's new RAH-66 Comanche helicopter. The size of the binocular HMD's field-of-view (FOV) is the size of the visual world available to the Army helicopter pilot via an imaging sensor. The Comanche HMD presents the FOV in a partial binocular overlap configuration rather than a full binocular overlap configuration. In this latter configuration, the images presented to both eyes, the monocular fields, present identical views of the visual world where the FOV consists of a single binocular region. In the partial binocular overlap configuration, the FOV consists of a central binocular overlap region seen by both eyes, and two flanking monocular regions, each seen by one eye. What is the operational effectiveness of this new visual interface? First, we briefly describe the relevant differences between normal unaided vision and vision with a binocular HMD. Then, we cover our recent empirical findings on the sensory and perceptual effects of this type of display and how visual performance might be affected. Any deficits in performance need to be quantified before they are manifested on the battlefield. This study investigates how target acquisition is affected by implementing various configurations of the HMD's binocular display.
Fifth Annual Workshop On Space Operations Applications And Research Soar 91
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Author :
language : en
Publisher:
Release Date : 1992
Fifth Annual Workshop On Space Operations Applications And Research Soar 91 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Aeronautics categories.