Download or read book Vision with the AN PVS 5 Night Vision Goggles written by and published by . This book was released on 1976 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper presents the results from a series of experiments in which visual performance using the AN/PVS-5 night vision goggle was measured. Modulation transfer functions of the man-goggle system were determined and compared to results obtained with unaided viewing. It was found that the man- goggle system performance was superior to unaided visual performance at average target luminances equivalent to 5% and 25% moon illuminances. At a target luminance equivalent to a full moon illuminance, unaided visual performance was superior at higher spatial frequencies, while remaining poorer at the lower spatial frequencies. Using a modified Howard-Dolman apparatus, it was determined that the stereoscopic threshold was degraded with the man-goggle system. Field measurements of relative depth discrimination using all available visual cues showed that performance of the man-goggle system was statistically equivalent to unaided photopic visual performance at intermediate viewing distances, but was inferior to unaided viewing at distances of 500 feet or greater. While the night vision goggle reduces the ambient light level necessary for military rotary wing support, use of the goggle does not allow the operator to perform with photopic visual efficiency.
Download or read book Attenuating the Luminous Output of the AN PVS 5A Night Vision Goggles and Its Effects on Visual Acuity written by Richard R. Levine and published by . This book was released on 1989 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aviators in combat may be subjected to a variety of noxious light stimuli. Filters and other eye protective devices may be used to counter these threats. At night, filters may be used in conjunction with image intensification devices (e.g., night vision goggles) to provide useful low-light vision as well as protection from deleterious light sources (e.g., lasers, pyrotechnics, nuclear fireballs, etc.). Technologies may be combined in a single, integrated head gear unit. The present study was performed in order in consider the effects on visual acuity after reducing night vision goggle luminous output from 0-99 percent. A range of target contrasts and ambient illumination levels was investigated. AN/PVS-5A goggles were selected based upon their compatibility with current phosphor display technology and their current ubiquity within aviation units. Visual acuity was assayed behaviorally because of its critical importance in flying performance. The results of the study provide normative acuity data with goggles alone and document the effects on goggle visual acuity with reduce goggle luminances as might be produced by protective materials placed between the goggles and the eyes. Keywords: Light filters; Human factors engineering; Night vision devices.
Download or read book Effects of Fatigue from Wearing the AN PVS 5 Night Vision Goggles on Skills Involved in Helicopter Operations written by Garvin D. Chastain and published by . This book was released on 1979 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comparative Visual Performance with Anvis and AN PVS 5A Night Vision Goggles Under Starlight Conditions written by Wayne F. Provines and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Night Vision Goggles written by United States. Congress. House. Committee on Armed Services. Subcommittee on Investigations and published by . This book was released on 1989 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Night Vision Goggle Research and Training Issues for Ground Forces a Literature Review written by Jean L. Dyer and published by . This book was released on 1998 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fatigue Effects from Wearing the AN PVS 5 Night Vision Goggles written by Garvin D. Chastain and published by . This book was released on 1979 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents an investigation of problems of discomfort and fatigue resulting from extended use of the AN/PVS-5 Night Vision Goggles. The studies specifically explored the nature of the problems encountered with the goggles, the types of abilities degraded after lengthy goggle use, and the promise of solutions to the problems which were suggested by goggle users. (Author).
Download or read book Comparative Visual Performance with ANVIS Aviator s Night Vision Imaging System and AN PVS 5A Night Vision Goggles Under Starlight Conditions written by R. E Miller (III.) and published by . This book was released on 1984 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental testing of 10 subjects wearing the AN/PVS-5A (II GEN) night vision goggles (NVG) and ANVIS (III GEN) NVG was conducted under field conditions of ambient starlight illumination (approx. 10-5 mL). The parameters measured were: 1) binocular visual acuity (BVA), 2) stereopsis (depth perception), and 3) a subjective forced choice test. Results showed that BVA was 20/124 and 20/86 for the II and III GEN NVG, respectively. This difference was statistically as well as clinically significant. The stereopsis test results were inconclusive and variable because of the limited sample size and relative inexperience of the subjects in using NVG. Neither BVA nor stereopsis with the NVG was found to be related to standard baseline measures of these parameters in the clinic. Even though the ANVIS has better gain, resolution and sensitivity, 6 out of 10 subjects preferred the AN/PVS-5A for viewing the subjective test. This seemingly paradoxical finding was surmised to be a result of the presence or lack of scene contrast due to the differential sensitivities in the II and III GEN photocathode tubes.
Download or read book Hand Receipt Manual Covering End Item Components of End Item COEI Basic Issue Items BII and Additional Authorization List AAL for Night Vision Goggles AN PVS 5 and AN PVS 5A NSN 5855 00 150 1820 Line Item Number N04456 written by and published by . This book was released on 1989 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Fatigue from Wearing the AN PVS 5 Night Vision Goggles on Skills Involved in Helicopter Operations written by Garvin D. Chastain and published by . This book was released on 1979 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reviews of the literature on rotary wing flight and interviews with aviators were conducted to determine which helicopter tasks and maneuvers are performed most frequently and/or are the most critical. Those operations found to be most critical were analyzed into perceptual and psychomotor components, and a battery of perceptual and psychomotor tests was selected to measure these factors. Aviators were tested both before and after flying with the AN/PVS-5 goggles. Eye-hand coordination was marginally affected following flight, and reaction time to lights was significantly affected. (Author).
Download or read book Infantry Applications of the Night Vision Goggles AN PVS 5 A Pilot Study September 1974 written by and published by . This book was released on 1975 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mobility and compatability tests of the AN/PVS-5 night vision goggles for infantry applications were conducted during August 1974 at Aberdeen Proving Ground, MD. Daylight observations of static relationships between the goggles and selected clothing/equipment ensembles were made. In addition, field observations, attitudinal measures and obstacle times are reported for 12 soldiers performing with the goggles at night, in combat ensemble over a 500- meter assault course. Recommendations for improvement of goggle design and further research are provided.
Download or read book Effects of Fatigue from Wearing the AN PVS 5 Night Vision Goggles on Skills Involved in Helicopter Operations written by and published by . This book was released on 1979 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reviews of the literature on rotary wing flight and interviews with aviators were conducted to determine which helicopter tasks and maneuvers are performed most frequently and/or are the most critical. Those operations found to be most critical were analyzed into perceptual and psychomotor components, and a battery of perceptual and psychomotor tests was selected to measure these factors. Aviators were tested both before and after flying with the AN/PVS-5 goggles. Eye-hand coordination was marginally affected following flight, and reaction time to lights was significantly affected. (Author).
Download or read book Depth Perception with the AN PVS 5 Night Vision Goggle written by Roger W. Wiley and published by . This book was released on 1976 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laboratory measures of stereopsis and field measures of relative depth discrimination while using the AN/PVS-5 Night Vision Goggle were determined and compared with data of unaided eye performance. Using a modified Howard-Dolman apparatus, the stereoscopic threshold was found to be considerably degraded with the man-goggle system when compared to photopic unaided eye performance. Field measurements of relative depth discrimination using all available visual cues showed that performance of the man-goggle system was statistically equivalent only at intermediate distances of 500 feet or less.
Download or read book Effects of Extended Use of AN PVS 5 Night Vision Goggles on Helicopter Pilots Performance written by Lewis W. Stone and published by . This book was released on 1984 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of extended use of AN/PVS-5 night vision goggles (NVG) were investigated by observing 10 NVG helicopter instructor pilots during two 6-hour missions. Each mission consisted of three 2-hour flights during which pilot control inputs and aircraft status variables were recorded in flight. Questionnaires were completed before the first mission and after the NVG mission. In order to examine for a carryover effect, subjects were flown in a crossover design in which half of the aviators flew NVG on the first mission, the other half on the second. Only the out-of-ground-effect hover showed a statistically significant carryover effect; that is, subjects who flew naked eye before NVG demonstrated a greater absolute difference in hover flight performance variability than those who flew naked eye after NVG flight. In the traffic pattern (final approach segment), there was a statistically significant difference between the visual conditions only. The postflight questionnaire responses revealed a concern over what was described as a lack of concentration and a decline of mental alertness. Some physiological stress reactions were reported. None of the three maneuvers analyzed revealed a significant effect on performance across flights.
Download or read book Modified Faceplate for AN PVS 5 Night Vision Goggles written by William E. McLean and published by . This book was released on 1982 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lack of peripheral vision while flying with the AN/PVS-5 night vision goggles (NVG) was a contributing factor in an aircraft accident. Because of this accident, a modified faceplate (MFP) for NVG was configured to allow pilots unaided lateral and lower vision. Twenty MFP NVG were worn during flight by 47 NVG qualified aviators for an average of 18 hours per aviator. The average recorded flight hours for each of the 20 MFG NVG was 43.5 hours. NVG aviators indicated that the MFP significantly enhanced intruder aircraft detection, inside-the-cockpit vision, and comfort. Spectacles can be worn with the MFP, and less fogging of the eyepieces occur. There were deficiencies reported during the study which were corrected with modifications to the mounting apparatus, thorough preflight briefings, and required familiarization flights. The proposed modification is being considered for adoption by the proper authorities. (Author).
Download or read book Organizational Direct Support and General Support Maintenance Manual Including Repair Parts and Special Tools Lists including Depot Maintenance Repair Parts and Special Tools written by and published by . This book was released on 1983 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laboratory Assessment of the AN PVS 5 Night Vision Goggle written by and published by . This book was released on 1975 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laboratory assessment of the AN/PVS-5 Night Vision Goggle was conducted. Visual fields, goggle infrared source, useable range, and detectability of targets with the goggle were measured. Illumination levels of -5.4 and -6.22 log foot candles were adequate for 90 percent detection of 0.14 and 0.07 acuity targets respectively. Calculations of distances at which various surface and airborne targets subtended comparable visual angles and tables of natural brightness conditions are presented to permit translation of laboratory values into field conditions. While further field evaluation is anticipated, the laboratory assessment indicates that the goggle can significantly facilitate aircrew night visual performance.
