An introduction to Night Vision Technology
Media on occasions reports war between countries. Soldiers attack their enemy bunkers at night. This is impossible without getting an exact location of their position which sounds very difficult at night. But humans have poor night vision capabilities compared to birds and animals. This is because the human eye lacks special tissues which improve night vision in animals. Night vision technologies
can be broadly classified into three types. Image intensification technology magnifies the amount of received photons from different natural sources such as light from a star or moon. Various real life examples of this technology are night glasses
and low light cameras. Second technology is an active illumination technology which is based on coupling imaging intensification technology.
This technology uses an active source of brightness in the infrared band. Another upcoming night vision technology is a thermal imaging technology that computes the temperature difference between the background and the foreground things. Animals are able to sense a thermal image
by means of dedicated smart organs which act like a bolometer. The thermal imaging principal allows thermal infrared sensing capabilities in snakes. Night vision technology is used in night vision devices commonly used by military forces. Night vision devices are also used in railways
to improve driver’s perception and seeing long distances at night or in bad weather.
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