Night Vision Binoculars
Night time has long been the friend and province of the predator. Because of the human beings’ very limited night vision capabilities, his nocturnal activities have always been strictly limited. His abilities to observe the world around him during the hours of darkness, were similarly restricted.
Since the Second World War, the steady increase in the capabilities of equipment designed to enhance the night vision capabilities of the human being, has resulted in a range of binoculars and other equipment that, for a price, can banish the darkness.
Whilst not providing the same clarity of image as that delivered by their daylight counterpart, night vision binoculars have developed to such a high degree, that most things that were hidden by the darkness can now be seen at an adequate level of clarity to permit detailed observation, depending on the magnification of the device.
Indeed, the very latest technology, enable law-enforcement and military operations in visual conditions not far removed from broad-daylight. Not generally available to the public currently, the price tag for this level of performance is prohibitive to say the least.
So how does this equipment work.
Night vision binoculars are electro-optical devices. Available light from the moon and stars is gathered by the objective lens and strikes a highly charged optical cathode. This fires electrons across a vacuum tube, intensifying the image in the process, to strike a phosphor screen. This provides the ghostly green image which typifies most night vision images. The green color was chosen because the human eye can identify more shades of green than any of the other available phosphor colors. The optical eyepiece then magnifies the image, which the user then views. So when using night vision binoculars, you’re not actually looking through the device, your looking at a screen which displays the intensified image.
Whilst they are a solution to seeing in the dark they do have a couple of drawbacks.
The electronics are powered by batteries, which increases the weight of the device. If the batteries go flat, no more viewing, unless replacement batteries are to hand.
Despite the drawbacks, for night time hunting or fishing, or watching the nocturnal behavior of the wild-life in your neck of the woods, then night vision binoculars are the answer to your prayers.
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I bought a pair of 1st generation Seben binoculars and am curious as to what causes the whine when they are active. I understand the principle behind how they work, but what causes the whine? I have night vision stuff because I like nature and I like gadgets. - Hawke Optics Bubble Level 11m Base HM1005
Hawke Optics Features: -For a professional mount solution. -Mounts and rails for day optics as well as night vision scopes. -Rails offer a secure interface for optical sights. -Precision made using materials such as high grade aircraft aluminum and high tensile screws. -Anti-glare mattee black finish to enhance the look of your rifle and scope.
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