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High-Tech "Eyes" Turn Night Into Day
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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Bad Consolidation Credit Debt 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."
The next day, however, things begin to take a turn for the worse when Bobby and Ed decide to rest on shore after becoming separated from Lewis and Drew.
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The next day, however, things begin to take a turn for the worse when Bobby and Ed decide to rest on shore after becoming separated from Lewis and Drew.
Bad Card Credit Credit 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.
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Bad Credit Loan Mortgage 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.
Auto Bad Credit Loan 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.
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Bad Credit Refinance 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.
Bad Credit Mortgage Second 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.)
Bad Credit Loan Student 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.
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Bad Credit Financing 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.
Bad Credit Home Loan Mortgage 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.
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Bad Card Credit Credit People 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.
Bad Credit Guaranteed Loan 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.
Bad Credit Refinancing 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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