Sunday, November 1, 2009

Thermal Vision Goggles For Outdoor Activities

By Frank Stevens

What most people think about when hearing the term thermal vision goggles is most likely the latest spy or war movie. They are typically the subject of spies infiltrating enemy camps and such, but they do have their real-life uses. In the real world, these types of devices are used by soldiers or law-enforcement officers who use them for security and surveillance, while some people also use them for hiking, camping and hunting.

There are two different types of night vision technology to chose from: thermal imaging and image enhancement. Image enhancement collects small amounts of light, including the lower portion of the infrared light spectrum, which is not generally visible to the human eye, and magnifies it so that surroundings can easily be seen.

The technology behind thermal vision goggles works by capturing the upper part of the infrared light spectrum. The light is emitted from the heat of an object and the goggles capture parts of the heat that is being emitted. The viewer sees the heat of the person or object, but does not get a clear image. The hotter the object, the more light is emitted and shown in the viewfinder. A human or animal will emit more infrared light than something that is inanimate.

These types of goggles can come in head-equipped and handheld variations. The goggles may have a single lens or two eye pieces, depending on the model. A spotting scope for focusing in on a target is also a common feature. Goggles that strap to the head are the best choice when the activity requires you to move around often, as they do rest securely on the head and allow the hands to be free.

The other benefit to thermal imaging models is that the reflection of light is not required to see a living animal in complete darkness. With the right kind of thermal vision goggles, objects can be seen in the dark or in extreme weather conditions over 200 yards away.

You can find several different models and styles, and usually need only two AA batteries to use. Thermal vision goggles can be purchased relatively inexpensively from outdoor, camping or online stores. These kinds of goggles are a great purchase for anyone who enjoys camping, hiking or hunting and they also can bring something new to an outing.

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