Night Vision Guide
This night Vision Guide
provides lots of easy-to-follow, practical information on how to select
the right night vision device. Selecting one is easy when you
understand not only how they work, but more importantly the best way to
Understanding how they work is fairly easy. The basic
principals behind all of these devices are the same. They all use
optics on one end to collect the little bit of light remaining in a
dark place. On the other end they produce a useful image that can be
viewed on a monitor connected to a video/DVR system or through the
ocular on a hand held device in the field.
The Information You Will Find Here
you are looking into buying a night vision device (NVD) then chances
are you have run into some of tech-speak presented in online sales
pages or across the counter at your local sporting goods store.
does all of that technical information mean and how significant is it?
Will the night vision device perform in the field? Protect your
home or business? Will it meet your expectations? How do you pick
the right one?
There are three basic types of Night vision
equipment: Image Intensifier Tubes (IIT), Digital Night Vision and
Infra Red. Each basic type has advantages depending on how and where
you use it. They all allow you to see in low to no light conditions,
some better than others.
Image Intensifier Night Vision (IIT) – Starlight Night Vision
are the generations of image intensifier night vision- 1, 2, 3 and even
4. These are the night vision devices that where and are currently used
in the field by militaries around the world and by savvy hunters in
places were it is allowed-in the field. The night vision generation
defines the devices state of development. As the numbers increase so does performance and price of the devices.
-gen 1 night vision
-gen 2 night vision
-gen 3 night vision
the day light optics you may be familiar with, what you see using the
now classic night vision of military movie fame, is light that has been
transformed intensified and presented on a flat screen in brilliant
green. Processed and transformed before your very eyes.
is not the same as looking through your usual daylight optics.
Binoculars, telescopes and microscopes collect, bend and magnify the
light your eye is sensitive to. They simply make objects larger and
bring out the detail you would not see without them.
vision devices on the other hand, take a small amount of light in near
dark places, much of it your eyes cannot see, and photon by photon
convert them to light your eyes can see. They do not magnify the light;
they convert the light and present a usable image.
Digital Night Vision (CCD/CMOS)Digital night vision
equipment has improved by leaps and bounds over the past few
years. Digital night vision devices are readily available and
very affordable for both field and fixed location use. They may be
mounted on tripods for animal observation, rifle mounted for hunting or
installed permanently for home, farm and business security.
sensors like the ones available in digital cameras and camcorders are
very sensitive to near infrared light (IR). The daylight versions of
these devices use special filters to remove the IR. Used without the
filters, these devices are matched with IR friendly optics and almost
invisible light illuminators to produce usable images in even the
How and where you will use it is the
first thing to consider when selecting a night vision device. Beyond
war, law enforcement and search and rescue, keeping an eye on things
around the house or homestead is the next big use of night vision.
is also professional surveillance, wildlife viewing, hunting camping
and boating. There is unfortunately, no one night vision device that
will fill all the requirements for what ever you do.
IR illuminator (the invisible flashlight)
An IR illuminator
works with image intensifiers and digital devices much like a
flashlight. In very low or no light conditions you can pack your own
light source, invisible to the naked eye of man or beast.