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March 29th, 2006, 16:23 | #16 | ||
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I'll find some info on it after work.
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March 29th, 2006, 18:16 | #17 | |
E-09
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March 29th, 2006, 18:21 | #18 |
March 29th, 2006, 21:55 | #19 | |
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I explained why it was true, just read. And I`m not the only one here to say that it`s true. |
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March 29th, 2006, 22:15 | #20 | |
Dark Helmet
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March 30th, 2006, 11:35 | #21 | ||
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How can I prove that it's not true? The key differentiation between civilian patterns of digital materials (i.e. Parklands or Frontenac) and issue-grade (DND licensed) materials is the application of the IR defeating coating that is applied to the material as it's dye-run. The treatment is said to reduce IR signatures by up to 40%. Regarding the pixelation of the pattern; A pixel is a pixel, a measurement of size. Blowing something up to half a centimeter by half a centimeter doesn't make it a pixel in the eyes of an IR scope, which measures HEAT and has nothing to do with pixelation or patterns. IR works by measuring differences in HEAT between the environment and man-made objects and providing a visual representation of the heat pattern. Pixelation is only a factor when dealing with digital surveillance equipment that cannot auto-focus due to the fractal pattern in use. Therefore, digital camouflage of ANY type provides some obfuscation against surveillance systems, but AS FAR AS I KNOW the pattern in and of itself has absolutely no bearing on effectiveness against IR. "Desert Night" patterned material is different - it uses a criss-cross shape which confuses earlier night vision systems, but again, has nothing to do with pixelation or IR. |
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March 30th, 2006, 13:07 | #22 | |
A Total Bastard
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IR is a wavelength of light in range invisable to the human eye. As such, mechanical devices used to detect it are not effected by pattern. Pattern is used to fool the human brain. IR distruption is achieved by trating material with chemicals that either lower the reflactivity at certain wavelengths, or absorb the wavelength. Patten has NO effect on modern IR. That doesn't mean it still can't confuse the brain of the person looking through the IR device, it's just much less likely, especially when you are using rigs that are true thermal and detact ONLY heat (light in the not visible range).
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VINCITE OMNIMODO
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April 8th, 2006, 23:11 | #23 |
I'd guess that camouflage is made in Vanouver by a guy named Guy Kramer, cool guy, but won't let you use patterns for free, and I understand that, because they will get around and people will copy them and he'd be out all the time and money he put into them. I'd bet it's http://hyperstealth.com/specam/order.html one of those. Incidentally you can purchase them. They look NICE.
Hyperstealth is in Vancouver, most of you probably heard of them, the camo at the start of this thread also sort of looks like theirs made for the Jordanian police. http://hyperstealth.com/pages/5/index.htm Or the SPEC4CE http://hyperstealth.com/spec4ce/index.html Or maybe this stuff they made for some movie, 'SpecAm Urbanized Terrain' I've got a woodland hat, and a gen1 monocular, and the green brown and tan all look the same in IR. You can't tell them apart. The black really stands out. So the pattern is 2-tones only in IR. (car tires, also black, also really stand out. Black stuff is so black it's almost like it's glowing, but glowing dark.) Not sure what it means for digital camo vs. NVD debate, but I could hold a camera to the lens and take a picture to show how it looks. "http://yarchive.net/mil/night_camo_clothing.html" I'd seen that before too, and that no-one uses 'night vision camo' anymore suggests it's true. |
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April 8th, 2006, 23:43 | #24 | |
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The green and tan look the same because they are refelcting the same / close to the same wavelength of IR. The black looks black because it is absorbing the IR and not reflecting any back to you. |
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April 9th, 2006, 11:43 | #25 |
Guest
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NVG IS NOT IR
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April 9th, 2006, 12:38 | #26 |
"The Basics
In order to understand night vision, it is important to understand something about light. The amount of energy in a light wave is related to its wavelength: Shorter wavelengths have higher energy. Of visible light, violet has the most energy, and red has the least. Just next to the visible light spectrum is the infrared spectrum. Infrared light is a small part of the light spectrum. Infrared light can be split into three categories: * Near-infrared (near-IR) - Closest to visible light, near-IR has wavelengths that range from 0.7 to 1.3 microns, or 700 billionths to 1,300 billionths of a meter. * Mid-infrared (mid-IR) - Mid-IR has wavelengths ranging from 1.3 to 3 microns. Both near-IR and mid-IR are used by a variety of electronic devices, including remote controls. * Thermal-infrared (thermal-IR) - Occupying the largest part of the infrared spectrum, thermal-IR has wavelengths ranging from 3 microns to over 30 microns. The key difference between thermal-IR and the other two is that thermal-IR is emitted by an object instead of reflected off it. Infrared light is emitted by an object because of what is happening at the atomic level." http://science.howstuffworks.com/nightvision1.htm I think this is why people refer to near-ir devices as 'Night Vision Devices', and thermal imagine devices as 'Thermals'. |
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