What are night vision glasses?
Night vision glasses can bring action movies or video games in mind, but they are real technology that works on scientific principles. Although they often use military organizations, night vision glasses are available to civilians. With these optical devices, the wearer can see up to 200 ft (60.9 m) from the Moon without turbidity.
Night vision glasses use one of two methods to increase their eyes. Image improvement concentrates light particles too small or too low in a color spectrum to pick up. One of the advantages for improving image is that it allows easy identification of a target that does not have to be thermal display. Thermal display is able to capture the heat of an object that appears to be bright, the warmer it. Thermal imaging is useful if you are looking for humans or animals, because non -emergency materials such as trees and rocks are not too displayed.
Green shade in which the pictures of night vision appear is the result of the technique of enhancementAzuology. When the pictures pass through the lenses of night vision glasses, they reach the screen covered in phosphorus, which shines when the electrons activates. These phosphors are deliberately tinted green because the human eye can identify and distinguish between green shades better than any other color.
The first night vision glasses were invented by the Army of the United States for use in the Second World War and the Korean War. Nazi forces invented similar technology, but was mainly used as a tank complement, while the American device used snipers. Later versions of the glasses eliminated the need for an infrared lighting source that are able to use ambient light instead. The current generation of army goggles is highly advanced and is able to increase the light of 30,000–50,000 times.
American Air Force recently conducted experiments with glasses of panoramic night vision, thus increasing the pilotFpoch view at 95 degrees. Several new experimental devices combine thermal display with image improvements in an effort to increase the visibility of targets. Some companies also recently premiered digital night vision with the possibility of zoom.
Night vision effects are a popular film in filming and often appear in movies for their traditional use as military or sniper aids or for comics. There are several lists on the Internet of various uses of technology in movies. Favorite examples include Patriot Games , cats and dogs , Black Hawk Down and sixteen candles
Some countries have laws dictating what form of night vision glasses are allowed for commercial civilian use. Be sure to check the relevant laws in your own country before purchasing night vision equipment. Prices differ very much depending on the generation of technology used in glasses. A simple monocular night vision device can costAmong 150-200 $ dollars (USD.) The most advanced binocular versions are relatively expensive and can exceed $ 10,000.