Night Vision Buyer's Guide

Our Night Vision products are comprised of high quality image intensifier tubes and optics to allow one to see in conditions too dark for the naked eye. Every Night Vision product includes an Infrared Illuminator. The Infrared Illuminator provides a light source for the system to amplify, providing enhanced images in very low light conditions, such as caves, where no ambient light is available for amplification. Night Vision scopes, binoculars, and goggles amplify existing light, allowing you to see in conditions too dark for the naked eye.

Choose a device with range and image quality suited to your appication

Intended Use	Recommendations
Close Range (Security)	1.7×29 Monocular 2.4×29 Scope 1.0×20 Goggles 3.1×50 Binocular
Long Range (Wildlife Viewing)	3.6×52 Scope 4.3×66 Scope 3.1×50 Binocular
Fishing & Boating	2.4×29 Scope 3.1×50 Binocular

How does it work?
Available light is gathered by the front Objective Lens, where it is transmitted through a set of optical lenses to the Electronic Intensifier Tube (E.I.T.). High levels of energy, produced by the device’s complex power supply, knock out electrons from the Photocathode Screen, located on the front of the Electronic Intensifier Tube. This same energy creates a highly static field, pushing the electrons to the Phosphorescent Screen, a sensitive layer, located on the back of the EIT. These electrons strike the Phosphorescent Screen with great speed, causing the screen to illuminate. This process produces an image, which is then magnified by the Ocular Lens located at the back of the device. By looking through the ocular lens you will see the image as if you just looked through a regular optical device, except the image will appear in a monochrome green color. Finally, the Ocular Lens provides adjustment for your particular eyesight, while the Objective Lens lets you adjust the focus according to the distance of the object you are viewing.

American Technologies Network Pvs73b Atn Pvs-7 Night Vision Goggles offer a dependable, high-performance design with a body built to US Military specs.

What is the effective viewing range of these devices?
It varies anywhere from 10 to 400 ft. The maximum viewing distance depends on the conditions of use. Overcast conditions, fog, rain etc. may reduce the effective distance of the viewer. An infrared illuminator will increase your viewing range, especially in enclosed spaces like a warehouse, garage or other enclosed parameters.

What do these numbers tell us?
The first number tells us how much nearer objects will look when viewed through the binocular. An object (like a bird, ship, or race horse, for example) that is 500 feet away will appear 1/7 of that distance (71 feet) in a 7x glass, 1/8 that distance (62 feet) in a 8x glass, and 1/10 the distance (50 feet) in a 10x binocular.

The second number tells us first, how big the binocular is. A glass with 50mm (millimeter) or larger objective lenses will be fairly large and heavy, whereas a binocular with 21mm lenses will be small and compact.

These two numbers together tell us the light gathering power of the binocular. Divide the objective size (second number) by the magnification (first number) and you arrive at the Exit Pupil. This Exit Pupil is the small circle of light you see in the eyepiece when you hold the binocular at arms length toward a light source such as the sky or a light colored wall. The larger this exit pupil, the more light is getting through to your eyes, which is a desirable characteristic, especially in dim light.

Related links: UK Goggles, UK Contact Lenses.

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