| It's difficult to see in the dark. Unless there's | | | | screen creating a viewable image. In reality it |
| some light peeking in through the window or from | | | | looks like you're watching television on a green |
| under a door, our vision is compromised. If we | | | | screen. |
| wait a little while, our night vision kicks in, allowing | | | | Atmospheric conditions can affect night vision. For |
| us to see somewhat better. It's not enough that | | | | instance, if it's cloudy, foggy, or overcast, night |
| we can read in the dark, but it should be enough | | | | vision can be compromised. The clearer the night, |
| to keep us from stumbling into furniture or | | | | the farther one will be able to see with night |
| tripping over the carpet. Sometimes though, our | | | | vision technology. It should also be noted that |
| human night vision isn't enough and we need a | | | | night vision shouldn't be magnified, as light is lost |
| little help. | | | | during the magnification process making it more |
| That's where technology kicks in. Thanks to | | | | difficult to see. |
| science we can use night vision to do all sorts of | | | | Night vision devices include: |
| things. With the proper equipment we can hunt, | | | | - Cameras |
| take pictures or even fight wars in the dark. We | | | | - Binoculars |
| can also perform surveillance and search and | | | | - Scopes for firearms |
| rescue missions. | | | | - Goggles |
| Here's how it works: Your night vision product will | | | | If you think that using a night vision device on a |
| take existing light and amplify it through an | | | | frequent basis might be harmful, you couldn't be |
| objective lens, which then focuses on an image | | | | more wrong. Night vision products are no more |
| intensifier. A photocathode located inside the | | | | harmful than a television or movie screen. It |
| intensifier converts the photon energy into | | | | doesn't emit radiation or other harmful rays and |
| electrons. The electrons in turn strike a phosphor | | | | there's no reason for it to cause blindness. |