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A night - vision device (NVD), also known as night optical/observation device (NOD) and night - vision goggles (NVG), is an optoelectronic device that allows images to be produced in levels of light approaching total darkness.
– U.S. military researchers are asking industry to develop night - vision devices far smaller and lighter in weight than today's night - vision goggles, which would be about the same size and weight as a typical pair of eyeglasses . Officials of the U.S. Defense Advanced Research Projects Agency
Optical specialists have attempted to widen the fields of view for today's night - vision goggles, but improvements come at the cost of increased systems size, weight, and wear -and-tear on the user. The ENVision project seeks to explore the next technical leap in night - vision technologies by achieving
Australian scientists bypass the complicated technique of conventional night vision devices by a coating with nanocrystals. © pr / jamie kidston / Australian National University The device is hardly distinguishable from a normal glasses.
night vision devices make the night for the day, with the military they are indispensable. But still we are unwieldy and expensive devices that transform the darkness with electronics into a visible picture. Further problem: For a good result, the inner life of the devices must be strongly cooled. No wonder these devices are expensive and chunky.
Scientist of Australian National University (Anu) now tests a completely different way. A thin coating with the semiconductor GalliumArsenide should provide the same service. The material transforms "invisible" infrared rays in visible light. This is a proof-of-concept. In 2016, the team succeeded for the first time to place these nanocrystals on a glass area. Then a pattern of tiny crystals were made, which together form a film. Now the scientists have made a prototype version of this film that is easy to produce cheap and easy to produce in series.
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PDF | Night vision based on technology of image intensifier tubes is the oldest electro-optical surveillance technology.
Find, read and cite all the research you need on ResearchGate.
night vision devices is based on a tube classification. IITs are typically divided into several generations in.
Night vision devices have a relatively long history in comparison to thermal imagers or visible/NIR cameras. First NVDs have been developed before the end of the Sec− ond World War  in situation when the first thermal imagers have been developed at the beginning of 1970s; and
This low interest of scientific community in night vision technology resulted in a small number of specialist litera− ture, a certain chaos in available literature, conflicting claims of superiority of different types of image intensifier tubes, marketing arguments promoted by different manu− facturers and repeated by some scientists.
little technology in night vision goggles
"We made the invisible visible," said the senior researcher Dr. Rocio Camacho Morales. "Our technology is capable of transforming infrared light that is usually invisible to the human eye and transforming images that can clearly see people - also from the distance. We have made a very thin film, which made of crystals in the Nanometer area consists, a hundred times thinner than a human hair, which can be applied directly to glasses and acts as a filter, so you can also see in the darkness of the night. "
"Conventional night vision goggles work by including infrared light," says Camacho Morales. "This infrared light is converted into electrons and displayed digitally. In our case we do not do that." In order to achieve a uniform image, night vision devices require complex cooling systems, which would be superfluous. "We avoid the problems to cool down camera and display devices," says Camacho Morales.
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Bircen night vision sunglasses : The glasses with POLARIZED yellow lens block headlight glare and provide you a clearer view in the dark nights , rainy or foggy days, make your driving safer and more convenient. Adjustable Al-Mg frame : High Elasticity and Durable, flexible arms and nose pad for different face types.
While doing the crucial research on the generic night vision driving glassess available in the market, you might ask yourself a few questions that will help you reach your decision
“When employed properly, night - vision equipment will open your eyes to the times usually dominated by four-legged critters and two-legged ne’er-do-wells, giving you the advantage,” claimed a May article in Shooting Illustrated, a publication of the National Rifle Association, on how to use the gear for “hunting and defense.”
Others worry that illegally exported night vision equipment could end up in the hands of rogue governments or terrorist groups, and erode the upper hand the U.S. military has in night fighting.
The foil has a simple tiny laser, as one finds it in laser pointers, which accumulates the nanocrystals and brings to light. In this way, the film creates "visible images that can be seen in the dark".
colored it will not be
The researchers assume that the material could become a cheap and lightweight replacement for the bulky night vision goggles that are used in military, police and security institutions today. Ultimately, it would hardly be more than a coated glasses. If a person would wear glasses with the movie during the day, she could still see all that normally perceives the mere eye, so morality. "In addition, you would see some infrared information."
Without much effort you can go home so at night in the dark, it is conceivable to coat car windows with the material. However, the sensory impression remains as with the well-known night vision devices. There is no "beautiful" multicolored image, as we are used to the day. The impulses of the infaro area are translated into a single color - typically in green.
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As part of the normal aging process, the eye ’s natural lens eventually blocks some short-wavelength blue light as well — the type of blue light with the highest potential to damage the retina and possibly cause macular degeneration and vision loss.
Blue light filters reduce the amount of HEV blue light emitted from these devices from reaching your eyes without affecting the visibility of the display. Some are made with thin tempered glass that also protects your device 's screen from scratches. As mentioned above, blue light-blocking computer glasses can also be helpful to reduce blue light
Source: Advanced Photonics
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