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How night vision works
Available light is gathered by the front Objective Lens, where it is transmitted
through a set of optical lenses to the Electronic Intensifier Tube (E.I.T.).
High levels of energy, produced by the device's complex power supply, knock out
electrons from the Photocathode Screen, located on the front of the Electronic
Intensifier Tube.
This same energy creates a highly static field, pushing the electrons to the
Phosphorescent Screen, a sensitive layer, located on the back of the EIT. These
electrons strike the Phosphorescent Screen with great speed, causing the screen
to illuminate.
This process produces an image, which is then magnified by the Ocular Lens
located at the back of the device. By looking through the ocular lens you will
see the image as if you just looked through a regular optical device, except the
image will appear in a monochrome green color.
Finally, the Ocular Lens provides adjustment for your particular eyesight, while
the Objective Lens lets you adjust the focus according to the distance of the
object you are viewing.
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