Article Surfing Archive

A night vision binocular is one of the devices that have 'night vision optics'. It is an electro optical device that exaggerates obtainable light instead of depending on a light source. It is receptive to an extensive range of light, from perceptible through infrared. Its infrared illuminator can amplify the available light found at the end of the spectrum. It casts a ray of light that is invisible to the naked eye. The light penetrates through an objective lens and hits a photo cathode which has a high-energy charge. Then, the energy hastens across a vacuum within an image intensifier and strikes a phosphor screen, similar to a TV screen. This is where the image is focused and magnified by the eyepiece. The human eye can set apart more shades of green than other phosphor colors. It is the reason why a night vision phosphor screen is deliberately colored green.

The viewing range of a night vision binocular generally falls within 10 to 400 feet depending on the model and type. Conditions like rain, fog, etc can have significant effects on the distance effectively viewed by a night vision binocular. Though some night vision binoculars need some illumination to function, there are also models capable of operating with no light at all using infrared illuminator.

Technical terms that are commonly used:

' Eye Relief ' the distance between the ocular lens and the viewer's eye.

' Focus Range ' the ability of binoculars to be focused infinitely

' Gain ' it is the number of times the light input is being amplified.

' Infrared Illuminator ' provides optimal application even with no illumination by giving a light source

' Line Pairs ' a way to measure resolution. For a better resolution, you need more line pairs.

' Ocular Lens ' the lens next to the viewer's eye.

' Objective Lens ' the closest lens against the object being viewed

' Phosphor Screen ' renders the visible night vision image

' Photo sensitivity ' the higher its value, the more visible an image is when viewed at night.

Practical applications:

' Great for Hunting and fishing

They say hunting and fishing is more exhilarating when done at night. These creatures are greatly able even when there is no sunlight. Devices and equipment must have the capabilities to remain effective and useful even at nighttime. Night vision binoculars make it possible for hunters and fishers to their mission anytime, anywhere like the sun

' Perfect for Wildlife viewing

A perfect view can be anytime of the day. But when the sun already sets, how are you going to take a glimpse? Some nocturnal creatures demonstrate unique characteristics thus making the adventure extraordinary. Other phenomenon and events taking place only at night are worth observing. Night vision binocular is one of the devices you can take along with you to keep the quest flowing.

' Makes Perfect Sense for Security and law enforcement

Threats and risks are more likely to happen when everyone is sleeping. But police officers and other security authorities will not call it a night without a fight. Night vision binoculars are very helpful in monitoring places that are poorly lit.