Night Binocular Technology - What Types Of Night Vision Products Are AvailableThe Article Bloke
Night vision technology has made its way from the military into the mainstream during the last few years. It has various applications in various adventure activities The technology has moved on over the years to be able to deal with lower ambient light levels.
Night binoculars operate by concentrating the incoming particles of light, or photons, onto a photoelectric device. This discharges electrons which are passed through a photomultiplier before striking a phosphor screen which becomes illuminated. This creates an image, visible to the human eye but of poor quality.
Second generation devices utilize a micro channel plate to generate much greater electron streams for enhanced image results. They do come in at a higher price point. Better quality phosphor lenses are used for military purposes but are outside the scope of the domestic market. These devices rely on working with the light that is available.
Passive Starlight optics use very large objective lenses to capture as much of the available visible light as possible. It is then focused onto a tiny area to produce a viewable image. When I refer to visible light, I refer to light in the portion of the spectrum that the human eye is able to process. Obviously, all light is itself invisible.
Active Starlight binoculars use built in electronics to enhance the available light to provide a clearer image. The downside is that they depend on a power source rather than just optics. When you are going into the wilderness, make sure you have batteries.
Active infra red devices work in the same manner as a normal active device except that they take advantage of light that the human eye is unable to handle and create a useful image from it. This type of light is emitted by most living things and these binoculars give you the chance to spot them when there is no normal light at all.
Image Intensifiers are at the top of the range and make use of every possible light source, from the visible spectrum and the infra red, to generate a good quality image. This type of technology is normally only used by the military.
Your choice of a night binocular rests on what level of ambient light you will be working in and how much you are willing to invest.
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