What is the difference between night vision generations?

Ken · Guest

What is the difference between night vision generations?

Ken

Admin · Site Admin Joined: 13 Jun 2003 Posts: 99

The most common question in regards to Night Visions Devices selection is &What is the difference between night vision generations?<b>& </b>& All Night Vision products amplify existing light, allowing you to
see in dark conditions too dark for the naked eye. Night Vision goggles, monoculars and binoculars collect and amplify existing light through the objective lens, which is then focused on the image intensifier. Inside the intensifier, a photocathode is &excited& by the light and converts the photon energy into electrons. These electrons accelerate across an electrostatic field inside the intensifier and strike a phosphor screen (like a green
monochrome TV screen) which emits an image that you can see. It is the acceleration of electrons, which provides gain and enhances the image.& The key difference between the night vision generations is the intensifier technology. Gen. I Night Vision devices use an intensifier tube that amplifies ambient light by accelerating electrons and striking a phosphor surface just like a Television.
Generation II night vision devices add a micro-channel plate that multiplies the number of electrons before they impinge on the phosphor screen, thus increasing gain; Generation III Night Vision goggles, monoculars and scopes further add a Gallium Arsenide photocathode which creates significantly more photoelectrons than Gen II night vision devices . Generation IV Night Vision is now offered by ATN. Generation II and III night vision devices offer greater light amplification, they are definitely better than Generation I, but a price beyond the reach of most buyers. Generation. I Night Vision devices are high quality and provide light amplification adequate for most recreational activities camping, hiking, fishing, boating, and nature viewing, and for many professional uses such as surveillance, search and rescue, and property management.
All this info about Night Vision and more can be see in our information section - "How to Buy Night Vision"

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