scispace - formally typeset
Search or ask a question
Topic

Night vision

About: Night vision is a research topic. Over the lifetime, 6004 publications have been published within this topic receiving 67372 citations.


Papers
More filters
Patent
14 Jun 1976
TL;DR: In this paper, a wide-angle view and a narrow-angle but higher-resolution view are observed simultaneously in superposed relationship to provide a composite view which is wideangle, but has a higher resolution part.
Abstract: In night vision apparatus, a wide-angle view, and a narrow-angle but higher-resolution view, are observed simultaneously in superposed relationship to provide a composite view which is wide-angle, but has a higher-resolution part Night vision goggles or binoculars have two optical channels, each with its objective lens system, image intensifier and eyepiece One of the channels presents a wide-angle view of a scene to one eye and the other channel presents a higher-resolution view of a central portion of the scene to the other eye, both views having the same magnification A degree of stereoscopy can be obtained in the central portion of the scene even though one eye is only receiving a low resolution view

22 citations

Dissertation
01 Jan 1998
TL;DR: Eppinger et al. as discussed by the authors applied Eli Goldratt's Theory of Constraints to project management in order complete projects faster and with greater predictability while simultaneously making more efficient use of resources.
Abstract: In an ever-intensifying global competitive market, the management of projects, particularly product development efforts, increasingly is one of the few areas that can produce a sustained competitive advantage Firms that can bring products to market faster can extract higher initial margins, can be more responsive to their customers, and will have products with longer sales lives Critical Chain is a new methodology that applies Eli Goldratt’s Theory of Constraints to project management in order complete projects faster and with greater predictability while simultaneously making more efficient use of resources The Critical Chain method accomplishes this by building project networks with average task durations, aggregating buffer at the end of projects where it can absorb unplanned iterations and other delays, and de-conflicting resources, both within and across projects This new project management methodology was researched by spending seven months on site with ITT Night Vision and applying the method to two product development projects In addition, benchmarking studies of previous product development efforts at the same site and of another lead user of the tool were conducted to provide both qualitative and quantitative comparison data Critical Chain appears to minimize schedule risk while simultaneously minimizing project duration, and has the potential to improve both communication and employee morale Thesis supervisors: Steven D Eppinger, Associate Professor, Sloan School of Management Anna Thornton, Assistant Professor, Department of Mechanical Engineering

22 citations

Patent
12 Dec 1985
TL;DR: A circuit for automatically removing battery power from a night vision goggle (10) upon its detachment from a headgear (12) is presented in this paper, where a magnet (34) on the headgear is magnetically coupled to a magnetic reed switch (36) fixed to the goggle.
Abstract: A circuit for automatically removing battery power from a night vision goggle (10) upon its detachment from a headgear (12) A magnet (34) on the headgear (12) is magnetically coupled to a magnetic reed switch (36) fixed to the goggle (10) On detachment of the goggle (10) from the headgear (12), the reed switch (36) switches battery current to a capacitively coupled coil (52) of a bistable latching relay (K1) Relay (K1) contacts (56, 62) are disconnected thus removing power from the image intensifier tube (40) On reattachment of the goggle (10) to the headgear (12), the On-Off switch (18) is cycled to pulse latching Relay K1 coil (64), thereby establishing a current path to the tube (40)

22 citations

Journal ArticleDOI
TL;DR: An overview of the history of search and detection modeling of military imaging systems pursued by NVESD directly, or in association with other government agencies or contractors, will provide both the novice and experienced search modeler with a useful historical summary and an introduction to current issues and future challenges.
Abstract: For more than 50 years, the U.S. Army RDECOM CERDEC Night Vision and Electronic Sensors Directorate (NVESD) has been studying the science behind the human processes of searching and detecting, and using that knowledge to develop and refine its models for military imaging systems. Modeling how human observers perform military tasks while using imaging systems in the field and linking that model with the physics of the systems has resulted in the comprehensive sensor models we have today. These models are used by the government, military, industry, and academia for sensor development, sensor system acquisition, military tactics development, and war-gaming. From the original hypothesis put forth by John Johnson in 1958, to modeling time-limited search, to modeling the impact of motion on target detection, to modeling target acquisition performance in different spectral bands, the concept of search has a wide-ranging history. Our purpose is to present a snapshot of that history; as such, it will begin with a description of the search-modeling task, followed by a summary of highlights from the early years, and concluding with a discussion of search and detection modeling today and the changing battlefield. Some of the topics to be discussed will be classic search, clutter, computational vision models and the ACQUIRE model with its variants. We do not claim to present a complete history here, but rather a look at some of the work that has been done, and this is meant to be an introduction to an extensive amount of work on a complex topic. That said, it is hoped that this overview of the history of search and detection modeling of military imaging systems pursued by NVESD directly, or in association with other government agencies or contractors, will provide both the novice and experienced search modeler with a useful historical summary and an introduction to current issues and future challenges.

22 citations

Proceedings ArticleDOI
18 Jun 1997
TL;DR: In this paper, the effect of restricting visual field-of-view (FOV) on rotorcraft pilot head movement was examined and the results indicated that pilots responded to restriction of horizontal FOV by changing their pattern of head movement, both in azimuth and elevation.
Abstract: The work reported in this paper examines the effect of restricting visual field-of-view (FOV) on rotorcraft pilot head movement. To simulate the FOVs of current and future helmet mounted displays (HMDs) used for night vision pilotage, a FOV restrictor was attached to the helmets of the test subject pilots. The restrictor limited horizontal FOV to 100, 80, 60, 40, and 20 degrees. Ten test subject pilots executed a set of low altitude flight maneuvers in an instrumented NAH-1S helicopter at the NASA Crows' Landing Airfield Head movement was measured with an IR head tracker for those pilots who flew in the rear seat and by a video camera for those who flew in the front seat. Test data indicated that pilots responded to restriction sin horizontal FOV by changing their pattern of head movement, both in azimuth and elevation. These compensation strategies change as FOV decreases and vary from pilot to pilot. Test results reported in this paper, in conjunction with referenced data outlining FOV effects on flight performance, handling qualities, and visual cue ratings, give visionic system designers and users predictive information on pilot workload and performance.

22 citations


Network Information
Related Topics (5)
Lens (optics)
156.4K papers, 1.2M citations
77% related
Laser
353.1K papers, 4.3M citations
68% related
Retina
28K papers, 1.2M citations
67% related
Visual acuity
32K papers, 797.1K citations
67% related
Glaucoma
31.5K papers, 738.2K citations
66% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202311
202244
2021132
2020170
2019256
2018272