Night vision enables you to see in the dark, but not like most people think. When you use night vision equeipment, such as goggles, you aren't looking through the device but at a screen.

Night vision devices don't produce light within themselves; they gather existing light and produce a green version of what you are looking at on screen. Night vision works best when there is more starlight or moonlight, under a clear sky with no fog.

Night vision products use one of two types of technology:

Image intensification (light amplified) collects light energy (or photons) from moonlight or starlight and converts them into electrical energy (electrons). The electrons bounce off of a phosphor screen and allow you to see an image in the dark. Most consumer night vision equipment is light intensification.

Thermal imaging (light infrared) captures infrared light, or heat emitted by an object. Warm objects, like human bodies, give off more light than cooler objects like buildings.

Night vision technology has been adapted for use in the following products:

• Scopes - Handheld monoculars, or mounted on a weapon.
• Goggles/Binoculars - Worn on the head, excellent for constant viewing or for tracking a moving object.
• Cameras - When night-vision is needed in a permanent location (for surveillance) digital cameras or camcorders are used with built-in night vision capabilities.

Night Vision Facts

• Works by capturing light
• The phosphorus screen is green because the human eye can differentiate more shades of green than any other color
• Night Vision is measured in generations (from 1 to 3). The higher the generation, the more developed the technology.

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