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Tuesday, November 22, 2011
Sunday, November 20, 2011
How Do Night Vision Goggles Work?
Ever wonder how do night vision goggles work? How are they different from your daytime binoculars? Why it is always green color using night vision goggles? In this article, I will explain the inner working of night vision googles.
The Image Intensifier Tube
Night vision is only made possible because of the invention of the image intensifier tube which can amplify very small quantities of light. The image intensifier is basically a vacuum tube that converts photons into electrons.
When lights enters an objective lens, it will strike a photo cathode that carries a high energy charge. The energy charge will travel through the image intensifier and converts photons to electrons and strike a phosphor screen where the image is illuminated. The ocular lenses on the night vision goggles helps to focus on the images.
The main reason why night vision goggles images are green is because through studies conducted, it has been found our naked human eye can differentiate more shades of green than any other color.
There are currently 3 generations of night vision goggles on the market from generation 1 to generation 3. Generation 3 night vision goggles are the most advanced with better image resolution and brightness and are considered even better than military grade goggles. Gen 3 night vision goggles uses gallium arsenide photocathode to enable greater viewing distances under much darker environments.
Thermal Imaging Night Vision Goggles
Another type of night vision goggles uses thermal imaging. It makes use of the fact that most objects whether living or non-living emit electro-magnetic radiation or heat. As a result, thermal imagers can pick up these heat signatures and display an electronic imagery.
One advantage of thermal imaging over night vision goggles that uses light intensifier tubes is that it does not rely on any type of ambient light to display images. Therefore, they are used extensively in environments where no light exists such as fog, hazes etc.
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Sunday, November 6, 2011
EyeClops Night Vision Infared Stealth Binoculars
!±8±EyeClops Night Vision Infared Stealth Binoculars
Brand : EyeclopsRate :
Price : $65.00
Post Date : Nov 06, 2011 23:00:16
Usually ships in 1-2 business days
Step into the secret black-ops world of the super spy! With Eyeclops Night Infrared Vision Binoculars, you own the night! These incredible binoculars are powered by real night vision technology, just like the super-secret spy forces use. This invisible infrared illumination lights up the night, so you can see up to 50 feet in absolute darkness! The Eyeclops Binoculars feature two modes: 'long range' for recon missions, and 'stealth mode' for close proximity observation. The form fitting performance visor blocks out exterior interference, and the focal adjustment knob dials in the perfect image clarity. The view is switchable between 'military' and 'spy' mode, and the action detailing looks totally tough! Eyeclops Binoculars are perfect for covert backyard recon missions, secret nighttime surveillance sessions, and clandestine spy work no government will acknowledge! They're one of the hottest gifts this year, and we've got them for less! Get yours, and see the secret for yourself!
Requires 5 AA Batteries (Not Included)
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