| So just why should someone consider purchasing a | | | | the ion barrier removed or it has become much thinner |
| pair of 4th generation night vision goggles over the | | | | which means that the noise and image being produced |
| other generations that are already available. Probably | | | | is much less distorted. |
| the biggest reason for choosing a 4th generation pair | | | | Because they have removed or made the ion barrier |
| over say a 1st, 2nd or 3rd generation pair of night | | | | much thinner in 4th generation NVG's today as well as |
| vision goggles is that the technology is much improved. | | | | improving the gating system, this meant that the range |
| Certainly in the last 10 years the industry has seen a | | | | of detection as well as the resolution at which the |
| marked improvement on how well the image | | | | images are seen by the user is much improved. They |
| intensifiers work in order to produce a much clearer | | | | are especially good as they can even be used when |
| image to the user. Today with 4th generation goggles, | | | | the light is extremely bad. As the ion barrier has either |
| a person is able to see much better quality images no | | | | been removed or made thinner this results in more of |
| matter what the light condition is like. This is why it now | | | | the electrons being able to make their way through to |
| makes them the best performing of all night vision | | | | the image intensifier which has resulted in all the |
| goggles that a person can actually purchase today. | | | | images being produced of a much higher quality. |
| Sometimes these types of goggles will be referred to | | | | However, it is important to note that only a few |
| as Generation 3+ goggles rather than Generation 4, | | | | manufacturers are actually currently producing these |
| but they do differ in two ways from the Generation 3 | | | | 4th generation night vision goggles and although they |
| goggles. | | | | are presently being used by both military and law |
| 4th Gen night vision goggles have an automatic gated | | | | enforcement agencies, it may be some time before |
| power supply to them which now regulates the | | | | they become readily available to the general public. But |
| voltage of the photocathode, which allows them to | | | | even when available to the public, you can expect to |
| instantly change to adapt to the lighting conditions that | | | | pay a premium for them because of their advanced |
| they are being used. Secondly they have either had | | | | imaging capabilities. |