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How Has Night Vision ProgressedArticle Summary: This article helps you see the levels of progress that has increased through the years [link widoczny dla zalogowanych] of night vision devices
Night Vision Devices have been around for over 35 years. They can now range from night binoculars to night goggles to night monocular. They are broken down by areas called generation. When new technology is established a new generation is added. Let's look at the different generations.
Generation [link widoczny dla zalogowanych] 0
The original night binoculars system created by the United States Army and used in [link widoczny dla zalogowanych] World War II and the Korean War, these NVDs use active infrared. This means that a projection unit, called an IR Illuminator, is attached to the night binoculars. The unit projects a beam of near-infrared light, similar to the beam of a normal flashlight. Invisible to the naked eye, this beam reflects off objects and bounces back to the lens of the night binoculars. These systems use an anode in conjunction with the cathode to accelerate the electrons. The problem with that approach is that the acceleration of the electrons [link widoczny dla zalogowanych] distorts the image and greatly decreases the life of the tube. Another major problem with this technology in its original military use was that it was quickly duplicated by hostile nations, which allowed enemy soldiers to use their own NVDs to see the infrared beam projected by the device.
Generation 1
Next we move away from active infrared, using passive infrared [link widoczny dla zalogowanych] instead. Once dubbed Starlight by the U.S. Army, these night binoculars use ambient light provided by the moon and stars to allow the normal [link widoczny dla zalogowanych] amounts of reflected infrared in the environment. This means that they did not require a source of projected infrared light. This also means that they do not work [link widoczny dla zalogowanych] very well on cloudy or moonless nights. These night binoculars use the same image-intensifier tube technology as Generation 0, with both cathode and anode, so image distortion and short tube life are still a problem.
Generation 2
Generation 2 night binoculars is a big step up due to major improvements. They offer improved resolution and performance over Generation 1 devices, and are considerably more reliable. The biggest gain in Generation 2 is [link widoczny dla zalogowanych] the ability to see in extremely [link widoczny dla zalogowanych] low light conditions, such as a moonless night. This increased sensitivity is due to the addition of the micro channel plate to the image-intensifier tube. Since the MCP actually increases the number of electrons instead of just accelerating the original ones, the images are significantly less distorted and brighter than earlier-generation NVDs.
Generation 3
This generation is currently used by the U.S. military. While there are no substantial changes in technology from Generation 2, these night binoculars have even better resolution and sensitivity. This is because the photo cathode is made using gallium arsenide, which is very efficient at converting photons to electrons. Additionally, the MCP is coated with an ion barrier, which dramatically increases the life of the tube.
Generation 4
Generation 4 technology shows significant overall improvement in both low and high level light environments.
The removal of the ion barrier from the MCP that was added in Generation 3 technology reduces the background noise and thereby enhances the signal to noise ratio. Removing the ion film actually allows more electrons to reach the amplification stage so that the images are significantly less [link widoczny dla zalogowanych] distorted and brighter.
The addition of an automatic gated power supply system allows [link widoczny dla zalogowanych] the photocathode voltage to switch on and off rapidly, thereby enabling the night binoculars to respond to a fluctuation in lighting [link widoczny dla zalogowanych] conditions in an instant. This capability is a critical advance in NVD systems where it allows the NVD user to quickly move from high light to low light environments without any halting effects. With the new, gated power feature, the change in lighting wouldn't have the same impact; the improved NVD would respond immediately to the lighting change.
Generation 0 or Generation 1 technology is your lower end units and may be disappointing if you expect the sensitivity of the devices used by professionals. Generation 2, Generation 3 and Generation 4 night [link widoczny dla zalogowanych] binoculars are typically expensive to purchase, but they will last if properly cared for. Also, [link widoczny dla zalogowanych] any NVD can benefit from the use of an IR Illuminator in very dark areas where there is [link widoczny dla zalogowanych] almost no ambient light to collect.
John Bentivegna has always been passionate about Night Vision Binoculars. He currently helps run a website [link widoczny dla zalogowanych] where they sell Night Binoculars along with Night Goggles and Night Monocular. Please visit to see all of our Night Vision Devices
**NOTE** - has claimed original rights on the article "How Has Night Vision Progressed" ... if there is a dispute on the originality of this article ... please contact us via our and supply our staff with the appropriate details of dispute (ie ).
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