Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
MIL-L-85762A, Lighting, Aircraft, Interior, Night Vision Imaging System (NVIS) Compatible, defines criteria for assessing night vision goggle (NVG) compatibility of cockpit lighting. As part of the assessment procedures, NVG aided visual acuity (VA) is measured using the USAF Tri-Bar Chart. A cockpit light is incompatible if NVG aided VA is degraded. An alternative method of measuring NVG aided VA uses an NVG Chart. This research assessed whether the two NVG aided VA assessment techniques reveal the same levels of degradation in NVG aided VA. NVG aided contrast sensitivity (CS) also was measured to determine its usefulness in assessing the compatibility of a cockpit light. Three NVG CS charts were developed having spatial frequencies of 3, 6, and 12 cycles per degree (cpd). NVG performance was degraded by incompatible light, and the amount of degradation was assessed using the two VA and CS measures. Measurements were made using a modified Class B NVG. Another objective of this research was to assess the compatibility of the modified Class B NVG with compatible cockpit light defined in MIL-L-85762A. The results revealed that NVG aided VA did not differ between the two VA charts. For the green light, NVG aided CS was degraded only for the high spatial frequency (12 cpd). However, for the red light, NVG aided CS was degraded for all three spatial frequencies. NVG aided CS was sensitive to the presence of incompatible light. The modified Class B NVG is compatible with the lighting requirements defined in MIL-L-85762A.
Effect of Incompatible Light on Modified Class B Night Vision Goggle-Aided Visual Acuity and Contrast Sensitivity
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
MIL-L-85762A, Lighting, Aircraft, Interior, Night Vision Imaging System (NVIS) Compatible, defines criteria for assessing night vision goggle (NVG) compatibility of cockpit lighting. As part of the assessment procedures, NVG aided visual acuity (VA) is measured using the USAF Tri-Bar Chart. A cockpit light is incompatible if NVG aided VA is degraded. An alternative method of measuring NVG aided VA uses an NVG Chart. This research assessed whether the two NVG aided VA assessment techniques reveal the same levels of degradation in NVG aided VA. NVG aided contrast sensitivity (CS) also was measured to determine its usefulness in assessing the compatibility of a cockpit light. Three NVG CS charts were developed having spatial frequencies of 3, 6, and 12 cycles per degree (cpd). NVG performance was degraded by incompatible light, and the amount of degradation was assessed using the two VA and CS measures. Measurements were made using a modified Class B NVG. Another objective of this research was to assess the compatibility of the modified Class B NVG with compatible cockpit light defined in MIL-L-85762A. The results revealed that NVG aided VA did not differ between the two VA charts. For the green light, NVG aided CS was degraded only for the high spatial frequency (12 cpd). However, for the red light, NVG aided CS was degraded for all three spatial frequencies. NVG aided CS was sensitive to the presence of incompatible light. The modified Class B NVG is compatible with the lighting requirements defined in MIL-L-85762A.
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
MIL-L-85762A, Lighting, Aircraft, Interior, Night Vision Imaging System (NVIS) Compatible, defines criteria for assessing night vision goggle (NVG) compatibility of cockpit lighting. As part of the assessment procedures, NVG aided visual acuity (VA) is measured using the USAF Tri-Bar Chart. A cockpit light is incompatible if NVG aided VA is degraded. An alternative method of measuring NVG aided VA uses an NVG Chart. This research assessed whether the two NVG aided VA assessment techniques reveal the same levels of degradation in NVG aided VA. NVG aided contrast sensitivity (CS) also was measured to determine its usefulness in assessing the compatibility of a cockpit light. Three NVG CS charts were developed having spatial frequencies of 3, 6, and 12 cycles per degree (cpd). NVG performance was degraded by incompatible light, and the amount of degradation was assessed using the two VA and CS measures. Measurements were made using a modified Class B NVG. Another objective of this research was to assess the compatibility of the modified Class B NVG with compatible cockpit light defined in MIL-L-85762A. The results revealed that NVG aided VA did not differ between the two VA charts. For the green light, NVG aided CS was degraded only for the high spatial frequency (12 cpd). However, for the red light, NVG aided CS was degraded for all three spatial frequencies. NVG aided CS was sensitive to the presence of incompatible light. The modified Class B NVG is compatible with the lighting requirements defined in MIL-L-85762A.
Effect of Incompatible Light on Modified Class B Night Vision Goggle-aided Visual Acuity and Contrast Sensitivity
Author: Randall W. Gibb
Publisher:
ISBN:
Category : Night vision
Languages : en
Pages : 22
Book Description
MIL-L-85762A, Lighting, Aircraft, Interior, Night Vision Imaging System (NVIS) Compatible, defines criteria for assessing night vision goggle (NVG) compatibility of cockpit lighting. As part of the assessment procedures, NVG aided visual acuity (VA) is measured using the USAF Tri-Bar Chart. A cockpit light is incompatible if NVG aided VA is degraded. An alternative method of measuring NVG aided VA uses an NVG Chart. This research assessed whether the two NVG aided VA assessment techniques reveal the same levels of degradation in NVG aided VA. NVG aided contrast sensitivity (CS) also was measured to determine its usefulness in assessing the compatibility of a cockpit light. Three NVG CS charts were developed having spatial frequencies of 3, 6, and 12 cycles per degree (cpd). NVG performance was degraded by incompatible light, and the amount of degradation was assessed using the two VA and CS measures. Measurements were made using a modified Class B NVG. Another objective of this research was to assess the compatibility of the modified Class B NVG with compatible cockpit light defined in MIL-L-85762A. The results revealed that NVG aided VA did not differ between the two VA charts. For the green light, NVG aided CS was degraded only for the high spatial frequency (12 cpd). However, for the red light, NVG aided CS was degraded for all three spatial frequencies. NVG aided CS was sensitive to the presence of incompatible light. The modified Class B NVG is compatible with the lighting requirements defined in MIL-L-85762A.
Publisher:
ISBN:
Category : Night vision
Languages : en
Pages : 22
Book Description
MIL-L-85762A, Lighting, Aircraft, Interior, Night Vision Imaging System (NVIS) Compatible, defines criteria for assessing night vision goggle (NVG) compatibility of cockpit lighting. As part of the assessment procedures, NVG aided visual acuity (VA) is measured using the USAF Tri-Bar Chart. A cockpit light is incompatible if NVG aided VA is degraded. An alternative method of measuring NVG aided VA uses an NVG Chart. This research assessed whether the two NVG aided VA assessment techniques reveal the same levels of degradation in NVG aided VA. NVG aided contrast sensitivity (CS) also was measured to determine its usefulness in assessing the compatibility of a cockpit light. Three NVG CS charts were developed having spatial frequencies of 3, 6, and 12 cycles per degree (cpd). NVG performance was degraded by incompatible light, and the amount of degradation was assessed using the two VA and CS measures. Measurements were made using a modified Class B NVG. Another objective of this research was to assess the compatibility of the modified Class B NVG with compatible cockpit light defined in MIL-L-85762A. The results revealed that NVG aided VA did not differ between the two VA charts. For the green light, NVG aided CS was degraded only for the high spatial frequency (12 cpd). However, for the red light, NVG aided CS was degraded for all three spatial frequencies. NVG aided CS was sensitive to the presence of incompatible light. The modified Class B NVG is compatible with the lighting requirements defined in MIL-L-85762A.
Effect of Incompatible Light on Modified Class B Night Vision Goggle-aided Visual Acuity and Contrast Sensitivity ... Al/hr-tr-1996-0149 ... U
Author: United States. Department of the Air Force
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
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
Interpreting Remote Sensing Imagery
Author: Robert R. Hoffman
Publisher: CRC Press
ISBN: 9781420032819
Category : Technology & Engineering
Languages : en
Pages : 324
Book Description
No matter how advanced the technology, there is always the human factor involved - the power behind the technology. Interpreting Remote Sensing Imagery: Human Factors draws together leading psychologists, remote sensing scientists, and government and industry scientists to consider the factors involved in expertise and perceptual skill. This boo
Publisher: CRC Press
ISBN: 9781420032819
Category : Technology & Engineering
Languages : en
Pages : 324
Book Description
No matter how advanced the technology, there is always the human factor involved - the power behind the technology. Interpreting Remote Sensing Imagery: Human Factors draws together leading psychologists, remote sensing scientists, and government and industry scientists to consider the factors involved in expertise and perceptual skill. This boo
Monthly Catalog of United States Government Publications
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1144
Book Description
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1144
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
Evaluation of Visual Acuity with Gen 3 Night Vision Goggles
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 46
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 46
Book Description
Glare and Contrast Sensitivity for Clinicians
Author: M. Princeton Nadler
Publisher: Springer
ISBN:
Category : Medical
Languages : en
Pages : 202
Book Description
There have been greater advances in our knowledge of the visual function and its disabilities in the past 50 years than had accumulated in all of the previous years. This applies not only to the basic science of biochemistry, physiology, physiopathology, and cytopathology but also to the diagnosis and treatment of visual dysfunction and ocular disease. These advances have been aided by a proliferation of ingenious instruments. When I began my residency in ophthalmology at The Wilmer Institute in 1938, one was supposed to learn not only the physiology of vision but also how to diagnose and treat all phases of ophthalmology including disabilities of the orbit, sclera, retina, lens, and cornea. In addition he or she was supposed to understand neuro-ophthalmology, ophthalmic genetics, and so-called uveitis. It soon became evident that no one could adequately comprehend all of these areas and, therefore, most young trainees today take a year or two of fel lowship in a specialized area following their three-to five-year residency train ing. Following this they join a group of other ophthalmologists and specialize. Thus, they become more expert in the diagnosis and treatment in a limited area in ophthalmology. When I returned to The Wilmer Institute in 1955 as Head of the Department I was the only full-time member of the staff. To date we have some 28 full-time ophthalmologists working in highly specialized areas of our institution.
Publisher: Springer
ISBN:
Category : Medical
Languages : en
Pages : 202
Book Description
There have been greater advances in our knowledge of the visual function and its disabilities in the past 50 years than had accumulated in all of the previous years. This applies not only to the basic science of biochemistry, physiology, physiopathology, and cytopathology but also to the diagnosis and treatment of visual dysfunction and ocular disease. These advances have been aided by a proliferation of ingenious instruments. When I began my residency in ophthalmology at The Wilmer Institute in 1938, one was supposed to learn not only the physiology of vision but also how to diagnose and treat all phases of ophthalmology including disabilities of the orbit, sclera, retina, lens, and cornea. In addition he or she was supposed to understand neuro-ophthalmology, ophthalmic genetics, and so-called uveitis. It soon became evident that no one could adequately comprehend all of these areas and, therefore, most young trainees today take a year or two of fel lowship in a specialized area following their three-to five-year residency train ing. Following this they join a group of other ophthalmologists and specialize. Thus, they become more expert in the diagnosis and treatment in a limited area in ophthalmology. When I returned to The Wilmer Institute in 1955 as Head of the Department I was the only full-time member of the staff. To date we have some 28 full-time ophthalmologists working in highly specialized areas of our institution.