NIGHT VISION AIDS:
Night vision aids allow people to observe
objects in low-light situations and were developed during the Vietnam War.
There are two types of night vision
1) Active Night Vision Aids shine an
invisible infrared light on the object. The person can then look
through binoculars or a viewing scope that is sensitive to the infrared
spectrum. This type of night vision aid is effective up to 450 feet
away from the object. The only thing wrong with it is that the light
must be shone in order to see the object, which can in turn be seen by
others looking through an infrared viewer. The price of an active
aid is usually about $1,600.
2) Passive Night Vision Aids are sort
of the opposite of active aids in that, instead of emitting light, it sucks
in the light from the room. No matter how pitch-dark it may be in
a room, there is always SOME light, so it takes that light and uses a photomultiplier
to boost the light 35,000 to 80,000 times, taking it up to visible levels.
night vision aids use batteries and can detect people from 600 feet away
for about $4,000. Night vision goggles, however, can be strapped
on without batteries for continuous night viewing for $7,000. The
night vision binoculars are about $10,000. (Yost 208)
Night Vision Binoculars
picture from http://www.nvoptics.com/nsg.html
picture from http://www.alista.com/gogglesB.htm
borrowed from (The Spy Shop)
Built by a Russian optical company,
this uses invisible infrared light to illuminate total darkness night vision.
Current: 100 mA
This page was last updated May 12th at approxiamately 4:18 PM