7
How Night Vision Works
Light (like moonlight or starlight) coming into the device from the direction of the object is gathered by
the objective lens and focused onto the Image Intensifier Tube.
The front of the Image Intensifier Tube contains a photocathode which converts light into electrons.
The device contains a very high voltage power supply, which converts the 3 volts supplied by the
batteries into 17 kilovolts.
The high voltage hurls the electrons into the phosphorous screen. The phosphorous screen illuminates
with an image when struck by electrons. The eyepiece optic then focuses the phosphorous screen
image to your eye.
How to Care for your Night Vision Device
If you intend to store your unit for more than 24 hours, it is best to remove the batteries.
Keep the unit in a cool, dry place.
Clean lenses the same way you would your camera, with professional lens cleaning supplies.
The lenses are optically coated and may be scratched if abrasive material is used or if dirt is rubbed into
the glass. Do not touch lens surface with fingers.
Do not drop or expose to shock. The Intensifier Tube is made of glass.
Do not disassemble or attempt to service the device. The power supply generates 17,000 volts inside!
If your device needs repair, please refer to your warranty card.
Do not leave inside a car on a hot, sunny day.
Clean exterior with a soft, clean cloth.
If condensation is visible on the unit, return it to a normal temperature and wait until the condensation
disappears before using.
Infrared
Illuminator (IR)
Electrons
Ocular
Lens
Photo Cathode
Screen
Phosphorescent
Screen
Object
EIT
Objective
Lens
