High-Tech "Eyes" Turn Night Into Day
Author:
Allan Tarvid
Operating a boat at night can be a risky and stressful
business. Realistically, most
loran and GPS units shouldn't be relied upon as the sole means
of navigation at night. Obviously, being able to see in the dark
is a great advantage. Night vision equipment makes locating
buoys, reading channel markers and spotting other public or
personal navigation markers much
easier. Hazards, such as floating debris, shoals, poorly-marked
jetties and boats running without lights, can all be readily
seen and avoided. As insurance, the gear proves invaluable in a
man-overboard situation.
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According to the indictment, Jones would steal various IBM and Penguin computer servers from Verisign's warehouse in Virginia and sell them to Johnson. Johnson would then sell the servers to several individuals, who would sometimes place them for sale on eBay. As a result of this scheme, the indictment alleges that Jones and Johnson caused Verisign to lose more than $120, 000 worth of computer equipment. In the indictment, Jones and Johnson are charged in three counts with causing the interstate transportation of stolen property, namely IBM 330 and 335 servers, in violation of 18 U.S.C.
Thinkpad During a recent television interview, a military pilot who
trains with night vision equipment in the Nevada desert mentioned
he was routinely distracted by the lights on air traffic going in
and out of LAX airport - more than 100 miles away! While the
general public may not get that level of performance, ITT product
engineer Mark Robinson says, "Given a clear sky and adequate stars
and/or moonlight, a good unit can give you a view comparable to
what your eye would see in normal daylight."
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Laptop Computers As recently as a few years ago, most people's knowledge of night
vision was confined to spy movies. Today, the number and variety of
night vision products have grown enough to confuse almost anyone.
It seems boating magazines run ads for everything from East
European military surplus imports selling for a few hundred
dollars, to civilian versions of current U.S. military equipment
costing thousands of dollars.
Anyone can buy new equipment built with Russian or American
technology at price points scattered between those extremes.
Computers that have printers attached (called print servers) have to be turned on if you want to print from a remote computer. If the computer is turned off, turn it on. It doesn't matter whether you know the logon password for the user name that appears during the logon process; nobody has to be logged on to a computer to use its shared printer. The Windows operating system on that computer simply must be started.
Laptop Computer Generally, price and performance seem to go hand in hand, but
deciding what to look for in a unit to get the level of performance
you need requires some background knowledge.
laptop computers is driving strong sales for notebook computers, according to the latest quarterly sales figures from the research firm IDC, which reported a 37% computer sales for the second quarter, compared with a year earlier. In the U.S., laptop sales grew 17.7%, while sales of desktop computers and servers fell 4%. The New York Times ( 10), CNET ( 10)
Desktop Computer The industry classifies night vision units as Generation zero,
1, 2, or 3 depending upon their level of technology. In the
computer world, a comparison might be made to units with 286, 386,
486 and Pentium processors.
Notebooks Generation zero units need an external infrared light source to
work. Generation 1 technology added improvements allowing operation
with only ambient starlight. Generation 2 models further improved
performance with less visual distortion, lighter weight and smaller
size. Generation 3 models (the latest) offer even better
performance through the use of a broader spectrum of light. And
their most important internal component - the intensifier tube -
enjoys a longer life.
Lenovo How They Work
Hard Drive Very simply, light enters a night vision unit through its
objective lens and is amplified and passed on to your eye.
Generation 1 units (the most common among imports), amplify light
about 2,000 to 30,000 times depending upon internal enhancements.
Generation 2 models boost light about 30,000 times, and Generation
3 models multiply light about 50,000 times. According to ITT,
military equipment specs for Generation 2 and 3 types call for
amplification gains of 20,000 to 37,000 times.
Travelstar The actual image improvement that your eye sees when switching
from one generation to the next depends upon the ambient light on
the scene. ITT Night Vision did a comparison test to determine how
far away a man 6 feet tall could be seen through Generation 2 and 3
models under different light conditions. There was only a 16%
difference under bright moonlight (.1 lux); but under a dark,
overcast sky (.0001 lux) Generation 3 performed 50% better than
Generation 2. (A lux is a unit of light measurement equal to the
direct illumination of a surface one meter from a one-candlepower
source of light.)
Gateway Generally, the darker the night the more difference a unit's
generation and amplification factor makes. As you can see from the
lux measurements, these units work in incredibly dark places.
Laptop Parts Cost
Software Prices rise with each step up to the next generation, and the
extra money sometimes buys you more than just extra light
amplification. Generation 2 and 3 units may have less visual
distortion, better resolution and a wider field of view than
Generation 1 models. Once again, the differences will be more
apparent under darker conditions and you'll probably not realize
the differences without personally trying each generation
technology yourself.
Hard Drives Adding accessories - infrared illuminators, head-mounts that let
you wear a binocular unit like
goggles when you need both hands
free, lenses that magnify image size and adapters for connecting
camcorders or still cameras - makes the price go up further.
Electronics Accessories
Canon Illuminators can add light under extremely dark conditions and
can help when using a magnifying lens. In general, just as a
telephoto camera lens cuts down the amount of light getting to the
film, a magnifying lens will reduce the amount of light entering a
night vision unit. Less light going into a night scope means less
coming out to your eye.
Desktop Pc A head-mount can be helpful while fishing or maneuvering around
an unlighted dock or other hull-threatening obstacles. Robinson
warns that a boat should be operated at slow speeds while wearing
this equipment: It isn't intended for high-speed cruising.
Desktop Computers Not long ago, the only equipment of this type available was the
actual night vision scopes themselves. Today, numerous accessories
exist to augment the equipment's performance. Magnifiers bring
objects closer, while infra-red flashlights light dim objects like
klieg lights brighten a Hollywood night. You can also take pictures
and video with night vision adapters. Though a camcorder's ability
to work in low light makes it better suited than a still camera for
shooting with night vision equipment, fast film in a still camera
can produce some unusual shots.
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