NVG adjustment methods, eyepiece focus settings, and vision

Arsdel, Richard Van; Baldwin, Jason; Hausmann, Martha A.; Harrington, Lawrence K.; Craig, Jeffrey L.; Koepke, Corbin G.

doi:10.1117/12.664449

Cited by 2 publications

(6 citation statements)

References 6 publications

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“…Specifications of programs on modern direct view imagers typically present requirements for an eyepiece diopter [18,19]. There is also a series of scientific papers that confirms importance of an eyepiece *corresponding author at: kch@inframet.pl diopter proper setting to achieve the optimum performance of night vision devices to be used by human operators [20][21][22][23][24]. This optimal tuning of the eyepiece-human eye is extremely important because a successful performance of some military tasks is largely dependent on visual performance of a night vision goggle [24,25].…”

Section: Importance Of the Eyepiece Diopter Parametermentioning

confidence: 99%

Opto-Electronics Review

Chrzanowski

2020

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This paper presents a detailed review on a present confused situation related to defining and measurement of the eyepiece diopter range of optical/electro-optical devices to be used for a direct observation by human observers. On the basis of this review three precise definitions of a direct view imagers eyepiece diopter are presented. One of these definitions is determined as optimal fit to describe the perception of human observers. Further on, design and measurement uncertainties of diopter meters are discussed and rules of accurate measurements are formulated. Finally, recommendations for the maximum acceptable errors of the diopter scale of eyepieces of classic types of direct view imagers are presented, as well.

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Section: Importance Of the Eyepiece Diopter Parametermentioning

confidence: 99%

Opto-Electronics Review

Chrzanowski

2020

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“…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%

“…In addition, focusing the eyepiece lens is essential. Inappropriate focus of either the objective or eyepiece lens can influence image quality, resulting in a less sharp and blurry image and physiological consequences, such as headaches (Antonio et al, 1994; Capó-Aponte et al, 2009; Gleason & Reigler, 2001; Pinkus & Task, 2000; Van Arsdel et al, 2006).…”

Section: The Technology or Devicementioning

confidence: 99%

“…Van Arsdel et al (2006) compared several methods of focus (referred to often as diopter adjustment), including using PNVGs. They showed that visual acuity, perceived image quality, and comfort ratings changed rapidly as a function of eyepiece focus settings.…”

Section: The Human Factorsmentioning

confidence: 99%

“…They showed that visual acuity, perceived image quality, and comfort ratings changed rapidly as a function of eyepiece focus settings. In particular, they found that a negative diopter setting was associated with deterioration of vision, and it was more pronounced with age (Van Arsdel et al, 2006). It should be noted that in the case of binocular NVGs and PNVGs, each tube can be focused independently.…”

Section: The Human Factorsmentioning

confidence: 99%

See 2 more Smart Citations

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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NVG adjustment methods, eyepiece focus settings, and vision

Cited by 2 publications

References 6 publications

Opto-Electronics Review

Opto-Electronics Review

The Human Factors of Night Vision Goggles

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