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A night vision image (NVI) tube is a key design element of any NVDs. It helps the device convert the light collected by the lens and amplify it many times, achieving better image quality. Several classifications separate this device into different categories. All of them are actively used in the description and analysis of the characteristics of optics. To better understand all the nuances of NVI tubes, you need to take some time and read our guide.
The NVI or image intensifier tube (IIT) is the primary design element of all devices supporting night vision technology. It is nothing more than a vacuum photoelectronic device responsible for converting radiation invisible to humans into a high-quality image. The latter is greatly enhanced by increasing the brightness and contrast, becoming visible to the human eye. The main task of IIT is forming a stream of electrons from the photons of light coming from the lens. A minimum of time is spent on this process, but its significance for obtaining the final result is as enormous as possible.
Further, under a particular influence, the number of electrons increases. Photons of light are knocked out of it, forming a multiply amplified stream. Based on it, the final image is formed, on which objects previously outside the field of view of the human eye become visible.
NVI tubes are the primary design element of various night vision devices. The most popular are monoculars, binoculars, scopes, and goggles. Each type of device effectively copes with specific tasks, which allows you to maximize the scope of night optics. From this, we can conclude that NVI tubes enable people to perform various previously impossible work without a bright light source.
One of the main classifications of all IITs is the division of these structural elements into generations. There is much controversy about the number of such ages and their names. However, according to official terminology, all NVI tubes are divided into five categories. Three of them are essential, and two are intermediate.
Generations image intensifier tubes:
Some unofficial classifications indicate the presence of IIT generation Gen III +. These tubes are a slightly improved version of the Gen III models. However, more than their difference is required to classify such IITs separately.
Dozens of different parameters are used to classify night vision image tubes. Each characterizes the capabilities of a given structural element of various NVDs and allows you to distinguish one IIT from another. All these parameters make it possible to divide NVI tubes into categories with standard features.
All NVI tubes are divided into many grades, each with a unique set of characteristics and capabilities for imaging with a certain number of flaws. The higher the IIT class, the more resolution it has and the fewer defects.
Grades of NVI tubes:
An essential structural element of any night vision device is the NVI tube. She makes it possible to carry out various manipulations with light, leading to its amplification. This positively affects the quality of the generated image and makes visible what was previously hidden in the dark. The presence of an NVI tube in the design of night optics opens up new possibilities for people and maximizes the range of applications for such devices.
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