Night Vision Goggle Assessment Techniques with Incompatible Cockpit Lighting and a Modified Class B Goggle PDF Download
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Author: Randall William Gibb
Publisher:
ISBN:
Category : Night flying
Languages : en
Pages : 158
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Book Description
Author: Randall William Gibb
Publisher:
ISBN:
Category : Night flying
Languages : en
Pages : 158
Get Book Here
Book Description
Author: Randall William Gibb
Publisher:
ISBN:
Category : Night flying
Languages : en
Pages : 0
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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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.
Author: Randall W. Gibb
Publisher:
ISBN:
Category : Night vision
Languages : en
Pages : 22
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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.
Author: Robert R. Hoffman
Publisher: CRC Press
ISBN: 1000612090
Category : Technology & Engineering
Languages : en
Pages : 326
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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
Author:
Publisher:
ISBN:
Category : Chemistry
Languages : en
Pages : 442
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Book Description
Author: United States. Department of the Air Force
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Jack D. Reising
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 0
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Book Description
"The requirements to assess the compatibility of aircraft cockpit lighting with night vision goggles (NVGs) are defined in MIL-L-85762A. Lighting, Aircraft, Interior. Nifiht Vision Imaging System (NVIS) Compatible. However, the procedures specified to evaluate cockpit lighting are primarily specific to the laboratory environment, with only a few assessments specific to the field environment. This report describes the procedures used by Armstrong Laboratory's Aircrew Training Research Division (AL/HRA) to conduct a field evaluation of aircraft cockpit lighting. The evaluation procedures are divided into Planning, Evaluation Preparation, Assessment Procedures, and Reporting Results. This report can also be used as a guideline for other organizations that need to conduct NVG-compatible cockpit lighting evaluations."--Page ii
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 29
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Book Description
Cockpit lighting can interfere with the proper operation of night vision goggles (NVGs) in several specific ways. For each interference mechanism, the effect on the image seen through the NVGs is to reduce the brightness of portions of the image and/or reduce the contrast of the useful image (the view outside the aircraft). This reduction in brightness or contrast may be manifested as a reduction in visual acuity and/or as an observed loss of contrast or brightness. AFRL/HECV was requested by the FAA (this research effort was jointly funded by the FAA and AFRL/HECV) to investigate low-cost, alternative methodologies that can be used by civil aviation to evaluate NVG cockpit lighting compatibility. In order to facilitate the inexpensive evaluation of cockpit lighting interference with the operation of the NVGs, a field evaluation kit was developed. This kit makes it possible to conduct a low-cost version of the standard visual acuity test method currently used by the Air Force. This report describes the fabrication, components, and implementation of this field evaluation test kit, which was recommended to and delivered to the FAA.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 7
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Book Description
Integrating NVGs into aircraft with incompatible interior designs limits performance and presents safety and operational concerns to the flying communities. Non- ejection safe NVGs and their corresponding carrying case presents a space dilemma forcing pilots to contend with where to safely store the goggles. An example of this occurred when the carrying strap entangled the flight controls of an A-10. Interior aircraft lighting not compatible with the spectral sensitivity of NVGs presents another concern. The prohibitive cost of aircraft modifications has resulted in the application of frequent "quick-fix" solutions. An effective lighting-fix was implemented in the cockpit of the B-1 bomber, but the problem persisted due to non-modified lighting from the aft stations. Aircraft System Program Office s (SPO), attempted to solve this problem by proposing the installation of a light-blocking curtain, separating the two compartments. Fabric samples for the proposed curtain were evaluated to determine the fabric which met the criteria. In the interest of reducing weight and maximizing battery life, NVG manufacturers and field units for the most part, have transitioned from alkaline to lithium batteries. However, with the use of lithium comes environmental, cost, and shipping concerns. The results of a comparative study on various batteries will be presented.
