How Night Vision Devices Work
1st Generation. Ambient light amplified approximately 10,000 times. Clear, bright, sharp image produced at a low cost. Object recognition: 100 yards. Object detection 125 yards.(Market price: $170 to $500.)
Night Vision Devices gather ambient light (starlight, moon-light, or infrared light) through the front objective lens. This light, is made up of photons, enters into a photocathode tube where the protons are changed to electrons. The electrons are projected to a phosphorescent screen that changes them into visible light that you can see through the eyepiece. The resulting image is a green-hued reproduction of the scene being observed.
2nd Generation. Ambient light amplified approximately 20,000 times. Increased resolution: clearer, brighter, sharper image. Unit uses less power & is more robust to withstand shock & impact. Object recognition: 200 yards. Object detection: 500 yards. (Market price: $1200- $3000.)
Laser Night Vision. Newest technology utilizing a computer chip and LCD display to provide a digital image instead of the traditional photocathode tube. This allows for day or night operation, no possibility in damaging tube, and resolution equivalent to Gen2 units, at an economic price. Display image is in black and white, rather than the green hue.Object recognition: 200 yards. Object detection 300 yards.(Market price: $400-$900)
3rd Generation. Ambient light amplified 30,000 to 50,000 times. Highest resolution with clearest,brightest, sharpest image. Unit designed to withstand harshest conditions. Effective life time 10,000 hours.Object recognition 300 yards. Object detection: 1,000 yards.
(Market price: $2600 and up)