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Nightvision binocular: From scouting to surveillance

Whether you're scouting for big game at twilight or dawn, or making a security patrol around your home or place of business on the darkest night, a nightvision binocular is an essential tool.
From nature watching to discreet surveillance, your nightvision binocular will show you what's hidden or trying to hide.

Nightvision devices (NVD) are sophisticated instruments that combine optical qualities with high-tech electronics to amplify what available light there is, allowing the user to see clearly, even in complete darkness. An NVD like a nightvision binocular is not designed to magnify distant objects. Most NVDs have a built-in infrared illuminator. The illuminator delivers additional light to enable viewing in even the darkest conditions. When you turn on the illuminator, you'll see a small red dot that tells you it's in operation.

The technology of the nightvision binocular and nightvision devices in general works to collect any existing light through the lenses at the front of the instrument. These lenses are known as the objectives. The collected light by the objectives is focused on an image intensifier which contains a photocathode. The collected light reacts with the photocathode and the photons in the light convert to electrons. These electrons accelerate and strike a phosphor screen (like a TV monitor), producing a visible image.

There are several "generations" of nightvision devices. The differences have to do with the technology in the image intensifier. Referred to as "Generation I, II, III or IV" instruments, the important thing to remember about these products is that the higher the number, the greater the light amplification and the better and clearer the image. The price increases as well, with Generation IV models costing thousands of dollars. For most applications, Generation I models offer high quality at a price point most recreational or casual users can afford. A Generation I model of nightvision binocular will also suffice for some professional applications like search and rescue, surveillance and security.

To learn more about the nightvision binocular, to read detailed descriptions or to see comprehensive specifications, click one of the links below.

Binoculars
Telescopes
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Night Vision
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Night Vision Goggles

About The Author:

Rita Liotta is a successful author and publisher at www.1st-at-binoculars.com.  Recommending binoculars, telescopes, rifle scopes, night vision, spotting scopes, laser sights, range finders & night vision goggles.
03-06-04