| Night vision goggles make use of the imaging device | | | | complete darkness. |
| which has the ability to detect visible and infrared light | | | | They are available in many different sizes and |
| sources and amplify them to provide visible images | | | | generations. Generations are used to refer to the |
| which can be viewed even in complete darkness. Night | | | | superiority and at present the US Military uses 4th |
| vision goggles are commonly used by the military, but | | | | generation version which is the most superior of all. |
| can also be used by the general public as well. These | | | | The prices of the night vision goggles also vary |
| can be found in a number of shops and stores and | | | | considerably depending on its quality. You can buy one |
| can either be held in hands or mounted to the helmet. | | | | for just a few hundred dollars or one which costs |
| Before these were available to the general public, only | | | | more than five thousand dollars. |
| the military and law enforcement agencies could use it. | | | | The two kinds which are available today include the |
| The military used it during the Vietnam War and since | | | | passive ones and the active ones. Passive goggles |
| then it has undergone numerous stages of | | | | use light which are available within the immediate area, |
| development. These days, there are highly superior | | | | while the active goggles project infrared lights. There |
| kinds available which are really effective and can even | | | | are also some which makes use of both these |
| detect a person standing more than 200 feet away in | | | | techniques. |