Author: Joseph T. Riegler
Publisher:
ISBN:
Category :
Languages : en
Pages : 30
Book Description
Since 1971, night vision goggles (NVGs) have been used by the military to enable personnel to perform visual operations in a nighttime environment. The key component of these devices is the image intensifier tube. Currently, no studies were identified which relate the signal-to-noise ratio (SNR) of image intensifiers to human visual acuity. The purpose of the present research was to determine the effect of NVG intensifier tube SNR on visual acuity. Visual acuity, using PVS-7 third generation NVGs, was measured for twelve participants at quarter moon and starlight illumination levels for four intensifier tubes with different SNRs. The range of SNR examined was 11.37 to 17.92. Visual acuity was assessed using Landolt C charts with target contrasts of 20 to 95 percent. The distance at which the acuity targets were resolved was recorded for each of the four illumination and contrast conditions. The results showed that increases in image intensifier tube SNR, illumination level, and contrast affected visual acuity. Regression analyses were performed to obtain estimated equations relating SNR to visual acuity for each experimental condition. The results were used to develop predictive guideline tables to provide approximate percent degradation/ improvement in visual acuity based upon intensifier tube signal-to-noise ratio ... Visual acuity, Night vision goggles, Signal-to-noise ratio, Image intensifier tubes.
The Effect of Signal-to-Noise Ratio on Visual Acuity Through Night Vision Goggles
Author: Joseph T. Riegler
Publisher:
ISBN:
Category :
Languages : en
Pages : 30
Book Description
Since 1971, night vision goggles (NVGs) have been used by the military to enable personnel to perform visual operations in a nighttime environment. The key component of these devices is the image intensifier tube. Currently, no studies were identified which relate the signal-to-noise ratio (SNR) of image intensifiers to human visual acuity. The purpose of the present research was to determine the effect of NVG intensifier tube SNR on visual acuity. Visual acuity, using PVS-7 third generation NVGs, was measured for twelve participants at quarter moon and starlight illumination levels for four intensifier tubes with different SNRs. The range of SNR examined was 11.37 to 17.92. Visual acuity was assessed using Landolt C charts with target contrasts of 20 to 95 percent. The distance at which the acuity targets were resolved was recorded for each of the four illumination and contrast conditions. The results showed that increases in image intensifier tube SNR, illumination level, and contrast affected visual acuity. Regression analyses were performed to obtain estimated equations relating SNR to visual acuity for each experimental condition. The results were used to develop predictive guideline tables to provide approximate percent degradation/ improvement in visual acuity based upon intensifier tube signal-to-noise ratio ... Visual acuity, Night vision goggles, Signal-to-noise ratio, Image intensifier tubes.
Publisher:
ISBN:
Category :
Languages : en
Pages : 30
Book Description
Since 1971, night vision goggles (NVGs) have been used by the military to enable personnel to perform visual operations in a nighttime environment. The key component of these devices is the image intensifier tube. Currently, no studies were identified which relate the signal-to-noise ratio (SNR) of image intensifiers to human visual acuity. The purpose of the present research was to determine the effect of NVG intensifier tube SNR on visual acuity. Visual acuity, using PVS-7 third generation NVGs, was measured for twelve participants at quarter moon and starlight illumination levels for four intensifier tubes with different SNRs. The range of SNR examined was 11.37 to 17.92. Visual acuity was assessed using Landolt C charts with target contrasts of 20 to 95 percent. The distance at which the acuity targets were resolved was recorded for each of the four illumination and contrast conditions. The results showed that increases in image intensifier tube SNR, illumination level, and contrast affected visual acuity. Regression analyses were performed to obtain estimated equations relating SNR to visual acuity for each experimental condition. The results were used to develop predictive guideline tables to provide approximate percent degradation/ improvement in visual acuity based upon intensifier tube signal-to-noise ratio ... Visual acuity, Night vision goggles, Signal-to-noise ratio, Image intensifier tubes.
Effect of Using High Signal-to-noise Image Intensifier Tubes on Night Vision Goggle (NVG) Aided Visual Acuity
Author: Keith D. Higginbotham
Publisher:
ISBN:
Category : Image intensifiers
Languages : en
Pages : 118
Book Description
Publisher:
ISBN:
Category : Image intensifiers
Languages : en
Pages : 118
Book Description
Procès verbaux des secines de l'enquete agricole
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 457
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 457
Book Description
Night Vision Goggle Research and Training Issues for Ground Forces, a Literature Review
Author: Jean L. Dyer
Publisher:
ISBN:
Category : Night vision devices
Languages : en
Pages : 82
Book Description
Publisher:
ISBN:
Category : Night vision devices
Languages : en
Pages : 82
Book Description
Technical Report
Author:
Publisher:
ISBN:
Category : Military research
Languages : en
Pages : 686
Book Description
Publisher:
ISBN:
Category : Military research
Languages : en
Pages : 686
Book Description
Selected Papers on Night Vision Technology
Author: R. Hradaynath
Publisher: SPIE-International Society for Optical Engineering
ISBN:
Category : Infrared technology
Languages : en
Pages : 1050
Book Description
This collection of 104 papers is divided into two parts. Part One, Image Intensification, focuses on developments with image intensified tubes. Part Two, Thermal Imaging, concentrates on the practical applications of night vision technology for its main users: the armed forces.
Publisher: SPIE-International Society for Optical Engineering
ISBN:
Category : Infrared technology
Languages : en
Pages : 1050
Book Description
This collection of 104 papers is divided into two parts. Part One, Image Intensification, focuses on developments with image intensified tubes. Part Two, Thermal Imaging, concentrates on the practical applications of night vision technology for its main users: the armed forces.
Man-Machine-Environment System Engineering
Author: Shengzhao Long
Publisher: Springer Nature
ISBN: 9811947864
Category : Technology & Engineering
Languages : en
Pages : 740
Book Description
Man-Machine-Environment System Engineering: Proceedings of the 22nd Conference on MMESE are an academic showcase of the best papers selected from more than 500 submissions, introducing readers to the top research topics and the latest developmental trends in the theory and application of MMESE. This proceedings are interdisciplinary studies on the concepts and methods of physiology, psychology, system engineering, computer science, environment science, management, education, and other related disciplines. Researchers and professionals who study an interdisciplinary subject crossing above disciplines or researchers on MMESE subject will be mainly benefited from this proceedings MMESE primarily focuses on the relationship between Man, Machine and Environment, studying the optimum combination of man-machine-environment systems. In this system, “Man” refers to working people as the subject in the workplace (e.g. operators, decision-makers); “Machine” is the general name for any object controlled by Man (including tools, machinery, computers, systems and technologies), and “Environment” describes the specific working conditions under which Man and Machine interact (e.g. temperature, noise, vibration, hazardous gases etc.). The three goals of optimization of the man-machine-environment systems are to ensure safety, efficiency and economy. The integrated and advanced science research topic Man-Machine-Environment System Engineering (MMESE) was first established in China by Professor Shengzhao Long in 1981, with direct support from one of the greatest modern Chinese scientists, Xuesen Qian. In a letter to Shengzhao Long from October 22nd, 1993, Xuesen Qian wrote: “You have created a very important modern science and technology in China!”
Publisher: Springer Nature
ISBN: 9811947864
Category : Technology & Engineering
Languages : en
Pages : 740
Book Description
Man-Machine-Environment System Engineering: Proceedings of the 22nd Conference on MMESE are an academic showcase of the best papers selected from more than 500 submissions, introducing readers to the top research topics and the latest developmental trends in the theory and application of MMESE. This proceedings are interdisciplinary studies on the concepts and methods of physiology, psychology, system engineering, computer science, environment science, management, education, and other related disciplines. Researchers and professionals who study an interdisciplinary subject crossing above disciplines or researchers on MMESE subject will be mainly benefited from this proceedings MMESE primarily focuses on the relationship between Man, Machine and Environment, studying the optimum combination of man-machine-environment systems. In this system, “Man” refers to working people as the subject in the workplace (e.g. operators, decision-makers); “Machine” is the general name for any object controlled by Man (including tools, machinery, computers, systems and technologies), and “Environment” describes the specific working conditions under which Man and Machine interact (e.g. temperature, noise, vibration, hazardous gases etc.). The three goals of optimization of the man-machine-environment systems are to ensure safety, efficiency and economy. The integrated and advanced science research topic Man-Machine-Environment System Engineering (MMESE) was first established in China by Professor Shengzhao Long in 1981, with direct support from one of the greatest modern Chinese scientists, Xuesen Qian. In a letter to Shengzhao Long from October 22nd, 1993, Xuesen Qian wrote: “You have created a very important modern science and technology in China!”
Head-mounted Displays II
Author: Ronald J. Lewandowski
Publisher: SPIE-International Society for Optical Engineering
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 370
Book Description
Publisher: SPIE-International Society for Optical Engineering
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 370
Book Description
Night Vision Goggle Field-expedient Visual Acuity Adjustment Procedures
Author:
Publisher:
ISBN:
Category : Night fighting (Military science)
Languages : en
Pages : 54
Book Description
Publisher:
ISBN:
Category : Night fighting (Military science)
Languages : en
Pages : 54
Book Description
Helmet- and Head-mounted Displays ...
Author:
Publisher:
ISBN:
Category : Aeronautical instruments
Languages : en
Pages : 334
Book Description
Publisher:
ISBN:
Category : Aeronautical instruments
Languages : en
Pages : 334
Book Description