Guides to buy Night vision Devices

Guides to buy Night vision Devices

Do you want to find some informations about telescopes for sale?I can introduce some for you. Night vision devices have been in use since World War II, but in recent years, night vision has become available to civilians as well. Night-vision devices allow you to see in very low lights. Like other optics and binoculars, night-vision devices can also magnify objects so they will appear closer, but the main use of night vision is to see things that your eye wouldn't normally be able to see in the dark or in low light. With all of the great uses for night vision, you may want to join in the fun, but if you're not sure how to buy night vision, then it can be tricky to know where to start. This night vision buying guide was designed to help you understand the different types of night-vision devices so you can find the one that works best for you.

Generations:When discussing night vision technology, you need to know about its technology generations.The earliest products (1950's) The earliest night vision scopes were based on image coversion, rather than intensification. They required a source of invisible infrared (IR) light mounted on or near the device to illuminate the target area.

1、Generation 1 - The "starlight scopes" of the 1960's (Vietnam Era) have three image intensifier tubes connected in a series. These systems are larger and heavier than Gen 2 and Gen 3. The Gen 1 image is clear at the center but may be distorted around the edges. (Low-cost Gen 1 imports are often mislabeled as a higher generation. 2、Generation 2 - The microchannel plate (MCP) electron multiplier prompted Gen 2 development in the 1970s. The "gain" provided by the MCP eliminated the need for back-to-back tubes - thereby improving size and image quality. The MCP enabled development of hand held and helmet mounted goggles. 3、Generation 3 - Two major advancements characterized development of Gen 3 in the late 1970s and early 1980s: the gallium arsenide (GaAs) photocathode and the ion-barrier film on the MCP. The GaAs photocathode enabled detection of objects at greater distances under much darker conditions. The ion-barrier film increased the operational life of the tube from 2000 hours (Gen 2) to 10,000 (Gen 3), as demonstrated by actual testing and not extrapolation. 4、Generation 4 - See the Night Vision Equipment Expert Blog for a good explanation of this commonly misunderstood advancement in night vision technology. Buying Night Vision Devices:

Goggles: Night-vision goggles give you a hands-free option for low-light vision, often without magnification. Night-vision goggles are perfect for exploring the woods at night.

Binoculars: Combining night vision with magnification, night-vision binoculars will magnify the view with realistic depth perception, making them perfect for navigation on land or sea. You can also use night-vision binoculars for security purposes.

Monoculars: Night-vision monoculars are lightweight and designed to fit conveniently in a pocket. Use a night-vision monocular when you only need to check things out for a few minutes at a time, such as for security.

Cameras: Take pictures of what you see in the dark. Night-vision video recorders let you film the action while you're at it.

Eye glasses: PNight-vision glasses can be used while driving at night or in foggy weather because they don't magnify at all. They also help reduce the glare from oncoming headlights.

NIGHT VISION TYPE:

1、Monocular

A monocular is an NV product that has one eyepiece and one objective. It usually refers to a unit that is held in the hands and is typically between 2x and 5x. An NV monocular has many advantages. It is the smallest NV unit, as well as the least expensive and it offers as much performance as a binocular or goggle. The only disadvantage of a night vision monocular is that it allows you to use only one eye when you observe. Over long observing sessions, this can create eye strain and fatigue, but, fortunately, most NV observing is intermittent, not continuous.

2、Binocular

An NV binocular is much the same as a daylight binocular in that it offers two eyepieces and two front lenses with the addition, of course, of an NV intensifier tube. An NV binocular still only uses one intensifier tube system, so it won't offer greater performance or range than a monocular, but it will provide more comfortable viewing since you are you using both eyes. However, an NV binocular will also be heavier and more expensive than an NV monocular.

3、Goggle

An NV goggle is any unit that comes with a headset. It comes in three versions:

1)Monocular goggle - As the name suggests, this goggle uses a monocular mounted to a headset. This is the lightest and least expensive type of night vision goggle (night vision system), but since you are using only one eye and one optical system, it will not be as comfortable to use as a system with two eyepieces, not will it provide any depth perception. 2)Bi-ocular goggle - The bi-ocular goggle feature two eyepieces, but only one front lens. This improves viewing comfort over a monocular goggle, but because there is only one front lens, there is no improvement in depth perception over a monocular. 3)Binocular goggle - The binocular goggle uses two eyepieces and two front lenses. This not only provides better viewing comfort than a monocular, it also provides depth perception since it is using two different optical systems. This is an important feature if you are using a goggle while in motion, say walking or even driving off road. Why use a night vision device instead of a flashlight?Two Reasons:Night Vision Devices make possible a quality of seeing that is far superior to flashlights. They provide your eyes with a light amplification tool that gives you much more night vision sensitivity than many nocturnal animals;See, without being seen. Think of the advantages of seeing without intruding when you are trying to find your way around an unlit campground. Property owners can observe nocturnal criminal activity. Hunters and nature lovers can observe animals without startling them. If you suspect a prowler is nearby, you can spot the ?perpetrator? without alarming him and safely call the police.So,Choose the right and be able to afford the night vision telescope,finally ,enjoy you time.

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