Optical Characterization of Wide Field-of-View Night Vision Devices

Marasco, Peter L.; Task, H. Lee

doi:10.21236/ada430272

Cited by 5 publications

(4 citation statements)

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“…It should be noted that binocular NVGs extend the FOV by presenting partially overlapped images (Velger, 1998) and are associated with better performance even in tasks that require a wider FOV (also CuQlock-Knopp et al, 1996). Similar improvements in performance were reported with the use of PNVGs (e.g., Craig & Geiselman, 1998; Craig et al, 1997; Marasco & Task, 1999). The trade-off between wider FOV and resolution can affect which tasks are more appropriate for NVGs and which for PNVGs.…”

Section: The Human Factorssupporting

confidence: 71%

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The Human Factors of Night Vision Goggles

Parush¹,

Gauthier²,

Arseneau³

et al. 2011

Reviews of Human Factors and Ergonomics

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The technology underlying night vision goggles (NVGs) enhances human ability to operate in dark and low-light conditions. However, NVG-aided vision is limited relative to daylight human vision and may entail risks. This review focuses on NVGs with image intensifier technology and explores the impact of their use on human performance. The review covers technology and device characteristics (image quality and field of view), physical configuration (ocular configuration, NVG weight, and forward center of gravity), and contextual and environmental factors (mission and task aspects, lighting, weather, and terrain). The key human factors in NVG use are visual and cognitive performance (visual acuity and contrast sensitivity, stereopsis and depth perception, distance and size estimation, spatial orientation, and situation awareness), and physical and physiological aspects (neck strain and injuries, and headaches). Understanding technology and contextual factors and their influence on human factors is critical to improving performance and safety with NVGs. Technology and device improvements, along with appropriate mission planning and training, play a critical role in aided night vision performance. INTroDuCTIoN Vision is the most dominant perceptual sense and requires adequate lighting to be effective. Yet there is often a need to operate in inadequate lighting circumstances. Many military missions and tasks are performed in poor light conditions and in the dark because it affords better concealment and surprise. In addition, numerous civilian operations and occupations take place in poor lighting conditions: search and rescue, law enforcement (police, border control, surveillance, etc.), hunting, wildlife observation, and many more. In most of those circumstances, people aim to perform in poor light conditions as well as they would in the daytime. However, although humans have developed exceptional day vision, they nevertheless have poor night vision. There is a real need, therefore, for technologies to enhance vision in low-light circumstances.

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Section: The Human Factorssupporting

confidence: 71%

“…The addition of the two monocular devices provides an expanded peripheral vision. The resulting image is a combination of the four intensifying tubes, which provides a 100° horizontal and 40° vertical FOV (Craig, 1999; Craig & Geiselman, 1998; Craig, Task, & Flipovich, 1997; Marasco & Task, 1999; Van Arsdel et al, 2006).…”

Section: The Technology or Devicementioning

confidence: 99%

The Human Factors of Night Vision Goggles

Parush¹,

Gauthier²,

Arseneau³

et al. 2011

Reviews of Human Factors and Ergonomics

View full text Add to dashboard Cite

show abstract

“…Visual Acuity [Marasco & Task, 1999] measures how well a human observer can see high contrast targets at specified light levels through the PNVG. The targets are a series of high contrast, square-wave gratings in steps of one Snellen acuity point (e.g.…”

Section: Visual Acuitymentioning

confidence: 99%

“…These discontinuities may be manifested as excessive overlap, gaps, magnification differences, image rotation differences, or image shifts. This procedure is designed to photographically assess and measure these defects by imaging a large 8 ft by 8 ft grid through the PNVG in-board and out-board channels simultaneously and comparing the defects to the size of grid features (Marasco & Task, 1999).…”

Section: Image Discontinuitymentioning

confidence: 99%