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Night Vision Explained
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Spy movies are often the first thing that comes to mind when people think about or discuss night vision technology. Do they actually work, or are they another form of moviemaking magic? In case you were wondering, the technology is very real and very effective. The standard set of night vision goggles will allow you to see a person standing 200 yards away on a cloudy, moonless night. Impressive, isnt it?

There are two different types of night vision technology. The first works on the principle of image enhancement. It works by collecting the minute amount of light contained in darkness, and amplifying it to the point where objects can be viewed. It even collects light from the lower end of the infrared light spectrum, which is generally imperceptible to the human eye.

The other way that night vision technology works is through a process known as thermal imaging. This process works by capturing the upper end of the infrared light spectrum. This part of the light spectrum is emitted in the form of heat, as opposed to light as we might recognize it. The warmer an object is the higher amount of this light is emitted.

There are some similar components in both night vision systems. Each of these systems is comprised of optics, some form of signal processing, and a viewing monitor. Image enhancement seems to be the prevailing technology contained in modern night vision systems. Both systems were developed, originally, for military use. In the United States, there are two classifications for night vision devices. The first is called MILSPEC, which refers to military specifications. The other is COMSPEC, which refers to commercial specifications.

This technology has been incorporated into a number of popular products, and put to use is many different ways. They are generally contained in three distinct categories; scopes, goggles, and cameras. Scopes are generally handheld or mounted on weapons, and are monocular. These are good for short-term viewing from a stationary position. Goggles are worn by the user and are binocular. As they are worn by the user, they are ideal for use over a longer period and during movement. Cameras are ideal for surveillance, as the images captured can be saved to a recording device or viewed on a remote monitor. This category also includes video imaging.

Night vision systems have come a long way since their early days of development. They are now used by law enforcement agencies and private investigators on a daily basis. They are also used by civilians for wildlife observation, security, surveillance, and personal entertainment. Night vision devices have become an integral part of the modern arsenal. Remember, not everything you see in the movies is make-believe.

This article was posted on November 14, 2005



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Original Source: http://www.articlecity.com/articles/gadgets_and_gizmos/article_205.shtml


Military Night Vision Goggles For Military With Waterproof Body And Mounting Mechanism By Abigail Taylor on December 04, 2010 0

Military night vision goggles are used by the army, navy and air forces of different countries, today such equipment is also used by the application of many law enforcement and security personnel (fire).

However, people can also buy night vision goggles for personal use, but usually do not have the same specifications you will find the military versions. Because the military night vision goggles have become an expected part of modern warfare is that they allow the user to see the pictures in the dark, which may not only be seen with the naked eye. Also the military versions have a special feature where they can focus on the user sees the image of each eye separately, which means that they are able to maintain depth perception when viewing images at any time.

How night vision works:

Most of the night vision goggles consist of image intensifier tubes, a waterproof body and mounting mechanism. Work in the near infrared bands to detect environmental light of the reflection is seen. image intensifier tubes for night vision goggles then extended to a weak light, using the photoelectric effect. Tube, the photons of light in to a flap that opens up the number of electrons. These electrons are then amplified Surge more electrons. A powerful electric field to pull electrons toward the screen mesh phosphor bronze, which produces light point of electron impact. This allows the screen to phosphorus produces a bright image.

Military night-vision goggles are generally used as artificial light during the military operations, and fight night. This increases the safety of soldiers, much as they can move without detected by their instruments of enlightenment.

The military uses two main types of night vision goggles:

* Image Intensifiers
Image intensifiers work by expanding the ambient light (flashlight enemy, moonlight, starlight) so you can see, as you would in the day. But the problem is that when a very bright light source appears, your picture overwhelmed. Their advantages are low weight, price, size and detailed images they bring, but consumes little electricity.

* Infrared Lenses
Infrared lenses to convert the infrared spectrum of visible light, but retail prices, which is low. He also has difficulty distinguishing between two objects that have the same level of heat (which is a question of who is the enemy and who is a friend). In some cases, night vision goggles can use infrared to see through walls.

These particular military night vision goggles take any light immediately in the vicinity of where they are, and expanded to increase the image of thousands of times using an image amplifier. night vision goggles work of the photoelectric effect, which is due to photons collide with the indicator plate. When photons hit the metal, then produces electrons which are then supplemented by further causing more electrons can be produced that ignites the screen in front of the user eyes. In some cases, all the user needs to illuminate the entire field of vision is a star high in the sky. You will often see these devices used to report on wars and the image we often see on television, where they used to be green.

Original Source: http://www.sooperarticles.com/news-society-articles/military-articles/military-night-vision-goggles-military-waterproof-body-mounting-mechanism-227377.html

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Night Vision Goggles From MW3

MW3 Night Vision Goggles These night vision goggles came with the MW2 Prestige edition game. They are not really a toy but they are also not completely the r…


Q&A:

Prison Mike asked Whats the best night vision goggle to get?

I was thinking of something i wanna buy, and night vision goggles came to mind. I dont have the money to by a super expensive one, so something around $100 was what i had in mind. Those Eyeclops ones look cool, but they look somewhat cheap and amde for children. What would you recommend?

And got the following answer:

Hahaha those goggles are only with american special forces,costs for thousands!

brave asked Can Walmart replace clear lenses in glasses?

I bought an old pair of frames at goodwill and I would like to get the prescription lenses replaced with just the clear lenses like the ones on display that people try on. I have perfect vision, but in need of some clear glasses for when I ride my motorcycle at night to protect my eyes, and I don’t like to wear motorcycle goggles because they give me a headache.
If they do this, any idea how much that it costs?
Tried calling but I can’t get through.
Thanks!

And got the following answer:

When you go there just tell them you want “plano” lenses (no power) put in. You won’t need a prescription because the resulting glasses don’t actually correct anything. I’m thinking they will cost about the same as the cheaper type single-vision prescription lenses. You might be able to buy fake glasses on line (frames & lenses) for cheaper than up-grading these old frames.

asked Im looking to buy a air of night vision goggles any recommendations for my circumstances?

Im 15 and moving to a house in the middle of the woods in the country. I thought it would be pretty cool to have some Night vision goggles to look around with at night. I am willing to spend up to about £100 and i want them to be pretty good quality and work well. Any ideas?
Are the modern warfare 2 prestige edition NVG’s any good?

And got the following answer:

For that little bit of money, all you’re going to find are first generation Russian surplus goggles; Read “funhouse grade optics, very little light gain, cheap,l and not worth it.”

A decent pair of III Generation PVS7-Cs are going to run you at leat 1500.

john b asked ok me and my friends are going to have a huge airsoft gun war?

i collect air soft guns and i own about 150 different guns every thing from snipers to aks to co2 power to spring power and batteries powers. we have had these wars before but I never had one at night so my question is do you know were i an buy night vision goggles to suit my playing field we are playing in the woods behind my house. any recommendation.

And got the following answer:

Because you’re expecting so many people to play I recommend small flashlights. The cheap flashlights that come with some guns work fine. Night-Vision Devices are awesome but expensive. I’ve done night games with a few of my friends and here’s what usually happens.

No Lights or Night Vision:
We all stand in 1 position for an hour waiting for the other person to move because we’re afraid of getting shot

Moon Light:
We played one night during a full moon. There was some movement, but not a lot because the trees blocked a lot of the lights

Cheap Flashlights
We used the cheap flashlights that came with some older guns, and the few of us without went to the dollar store and got some cheap flashlights. We finally started to run around, there was a lot more action.

Night-Vision:
A few of us brought Night Vision Goggles. Started off fun because we were so excited. Then someone got their goggles shot and they were pissed. Another one their goggles stopped working so they got lost in the woods. And the third, they ran into a tree and broke their goggles

Night Vision and Flashlights:
[This occurred before the previous story] Again we used cheap flashlights and Night Vision goggles. Started off good until the people with flashlights figured out they would shine them towards the people with Night vision and blind them temporarily.

Moral of the story, buy cheap flashlights and have fun.
If you get serious and play with other serious people then get night vision devices.

titties mcgee asked Where can you buy night vision monoculars in melbourne?

i need to know where to find night vision or (preferably) thermal imaging goggles cheap soon in melbourne, victoria! help?

And got the following answer:

You can find both for sale on eBay. Night vision isn’t too expensive but wait till you see what thermal imaging sells at. No such animal as “cheap” thermal imaging.

I hope this helps and you can find it useful

b down asked Is there a website where you can buy cheap equipment from the military bases?

I’m trying to find some night vision goggles, I’ve heard there’s a discount website associated with a US military base where you can buy them cheap. thanks for any help.

And got the following answer:

To get into the website of military auctions, (I HAVE BEEN TO MANY), you actually have to buy a crate. Whats in their is mystery. You have to know somone, in the DOD, that is currently running the warehouse. Also if you want a pair of NVG’s without having to buy a huge crate full of unknowns, the go to
http://www.uscav.com/Category.aspx?CatID=525&TabID=1 and you can buy them here or any other military website such as rangerjoes.com

Joey asked Do the Night Goggles is Call of Duty 6 really work?

So from what I heard there are goggles that you can buy along with the new COD Modern Warfare 2. So, do they really work? Are they gonna be worth the buy?

And got the following answer:

Yea, they really do work. They are real Night Vision Goggles, not cheap plastic made stuff that will break easy or anything too expensive that’s just for show. They are decent priced goggles that you can actually use around your house for example. You know, middle of the night when everyone’s asleep and you’re hungry, put on the goggles and you can see everything in the dark. But they also aren’t top top notch military goggles either, cuz those would cost too much. If you have $150 to spare, they’re definitely worth getting.