Long past the story when night vision was something referred to only James Bond movies. Now anyone can get a night vision binoculars available in the market. Have you ever wondered how these devices work? Well for that, you first need to understand what night vision binoculars are.
Also known as night vision device or simply NVD, these binoculars are capable of providing vision in low-light and dark conditions. This makes the best night vision binoculars very useful for combat forces and law enforcement agencies, however, night vision binoculars are available for civilian users also. A good night vision binocular can help you see a target 200 yards away from you, that too, in a cloudy and moonless night.
Having understood what night vision binoculars are, now you must know a few facts about light. We as humans are not able to see all types of light present in the universe. The light which is visible to us is only a part of the overall spectrum. There are other types of light which are present in the universe such as infrared and ultraviolet light which we cannot see from naked eyes.
Coming to the point; how do night vision binoculars work? In layman’s term, these devices work by amplifying all the available light to enhance and provide an image. This is the basic principle underlying the night vision technology. Even in the darkest conditions, there is some light available (including infrared light) which we cannot see with our naked eyes. Night vision binoculars collect whatever light is available and by using image enhancement technology, they amplify and produce the image.
Explaining the working of night vision binoculars step by step:
1. Dim light enters the lens of binocular. Light is made up of micro-particles called photon which contains all the colours.
2. Photons strike against a light-sensitive surface called photocathode where they are concerted in electrons.
3. Electrons are amplified by a photomultiplier which emits more electrons in return.
4. These emitted electrons hit a phosphor screen and produce tiny flashes of light which collectively produce the image.
The phosphorus screens in night vision binoculars produce green pictures. This is intentionally done because our eyes are more sensitive towards green light and it is easier to look at green pictures for long periods of time than it is to look at black and white pictures.
Another technology which night vision binoculars use is thermal imaging wherein, instead of looking for the light that objects reflect, we look for the heat they discharge. Living things are hotter than their surroundings and emit infrared radiation. These infrared radiations are captured and converted into an enhanced image using thermal imaging technology. These binoculars are used in the condition of
Night vision binoculars have many uses. They can be used by civilians for watching night safari and hunting or by military and law enforcement agencies for combat operations, surveillance and navigation. This gear enhances your ability to move swiftly in dark conditions and successfully accomplish your objectives. Night vision binoculars are now available with a variety of specifications and features. You can find the night vision binocular which fits your need easily in local market or online.