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Most consumer night vision
products are light amplifying devices. Light amplification is less expensive than thermal; however, higher-end and more effective
night vision tubes can become more expensive. Light amplification technology takes the small amount of light, such as moonlight
or starlight, that is in the surrounding area, and converts the light energy (scientists call it photons), into electrical
energy (electrons). These electrons pass through a thin disk that's about the size of a quarter and contains over 10 million
channels. As the electrons travel through and strike the walls of the channels, thousands more electrons are released. These
multiplied electrons then bounce off of a phosphor screen that converts the electrons back into photons and lets you see an
impressive nighttime view even when it's really dark.
All image intensified night vision products on the market today have
one thing in common: they produce a green output image. But that's
where the similarities end.
In the night vision world there are
generations that reflect the level of technology used. The higher the generation, the more sophisticated the night vision
Generation 0 - The earliest (1950's) night
vision products were based on image conversion, rather than intensification. They required a source of invisible infrared
(IR) light mounted on or near the device to illuminate the target area.
Generation 1 - The "starlight scopes" of the 1960's (Vietnam Era) have three image intensifier tubes
connected in a series. These systems are larger and heavier than Gen 2 and Gen 3. The Gen 1 image is clear at the center but
may be distorted around the edges. (Low-cost Gen 1 imports are often mislabeled as a higher generation.
Generation 2 - The microchannel plate (MCP) electron multiplier prompted Gen 2 development
in the 1970s. The "gain" provided by the MCP eliminated the need for back-to-back tubes - thereby improving size
and image quality. The MCP enabled developments of hand held and helmet mounted goggles.
Generation 3 - Two major advancements characterized development of Gen 3 in the late
1970s and early 1980s: the gallium arsenide (GaAs) photocathode and the ion-barrier film on the MCP. The GaAs photocathode
enabled detection of objects at greater distances under much darker conditions. The ion-barrier film increased the operational
life of the tube from 2000 hours (Gen 2) to 10,000 (Gen 3), as demonstrated by actual testing and not extrapolation.
Generation 4 - is not recognized by the US Government as a generation. Gen 4 is misquoted and
is generally considered thin film, filmless or auto gated tubes such as PINNACLE® tubes
PINNACLE® image intensifier tube technology is the latest
development in state-of-the-art, tactical night vision equipment, allowing users to complete their mission objectives without
being blinded by sudden exposure to bright light. Traditional night vision equipment does not offer this ability. Sudden bright
light exposure renders the user ineffective until the lights are turned off – or the night vision equipment is removed.
Special Operations teams often face entry into dark dwellings or structures under the cover of night. Night vision
equipment is used to enter and navigate once inside. If the lights are suddenly switched on for any reason, traditional night
vision equipment will “bloom” or “washout” rendering the user temporarily blind. With PINNACLE®
night vision products, users maintain their vision regardless of the amount of light they are exposed to.
night vision technology represents the apex in image intensifier tube development. The super thin-film (10,000 times thinner
than a human hair) minimizes blooming caused by bright light exposure, while the auto-gating diminishes power to the system
thereby decreasing the amount of amplified light allowed into the unit.
When discussing night vision technology, you also may hear the term "Omnibus"
or "OMNI". The U.S. Army procures night vision devices through multi-year/multi-product contracts referred to as
"Omnibus" - abbreviated as "OMNI". For each successive OMNI contract, ITT has provided Gen 3 devices with
increasingly higher performance. ( See range detection chart directly below) Therefore, Gen 3 devices may be further defined
as OMNI 3, 4, 5, etc. Current Omnibus contract as of 2006 is OMNI 7.
If you're using night vision to find a lost person in the woods, to locate boats or buoys on the water, or
to stargaze into the wilderness, you need Generation 3 because it creates the best images when there is very little ambient
light. Generation 2 may be the choice in situations with higher levels of ambient light.
KEY GENERATION DEVELOPMENTS:
GENERATION 1 (Developed in 1960's); Vacuum Tube Technology
Full Moon Operation
Operating Life: 2,000 Hours
GENERATION 2 (Developed
First Microchannel Plate (MCP) Application
One-Quarter Moon Operation
Operating Life: 2,500 Hours
GENERATION 2+ (1970s)
Development increased image tube bias voltage to improve gain.
Additionally, a glass faceplate was added to improve resolution.
3 (Developed in 1990's);
Improved MCP & Photocathode
Operating Life: 10,000 Hour
GENERATION 3 Enhanced (2000's);
Improvements in the
photocathode and MCP resulted in increased gain and resolution.
you're using night vision to find a lost person in the woods, to locate boats or buoys on the water, or to stargaze into
the wilderness, you need Generation 3 because it creates the best images when there is very little ambient light. Generation
2 may be the choice in situations with higher levels of ambient light.
There are three important attributes for judging performance. They are: sensitivity,
signal-to-noise, and resolution. As the customer, you need to know about these three characteristics to determine the performance
level of a night vision system.
Sensitivity, or photoresponse, is the
image tube's ability to detect available light. It is usually measured in "µA/lm," or microamperes per
lumen. That's why many of our products do not come with standard IR illuminators. With many applications illuminators
aren't necessary. Some manufacturers put IR illuminators on their products in order to get acceptable performance under
low light conditions.
Signal-to-noise (S/N) plays a key role in
night vision performance. A microchannel plate used to transfer a signal from input to output. Just as high-end stereo equipment
gives you quality sound.
Resolution is the third major consideration
when purchasing night vision. This is the ability to resolve detail in your image. Some manufacturers put magnified optics
in their systems to give the illusion that they have high resolving systems. In the trade-off, field of view is sacrificed.
Some models give the option of higher magnification so you can have it if you want it, not because your system needs it to
function effectively. Most of Own the Nights products offer a uniquely formulated phosphor to create the highest contrasting
images, therefore generating the highest resolution products available to the consumer.
Distance and Magnification Charts:
Characteristics of Night Vision
*Chart based on night vision system with 1x lens. Recognition range
will increase when greater magnification is used.
of Night Vision
Using intensified night vision is different from
using regular binoculars and/or your own eyes. Below are some of the aspects of night vision that you should be aware of when
you are using an image intensified night vision system.
Objects that appear light during the day but have a dull surface may appear darker, through the night vision
unit, than objects that are dark during the day but have a highly reflective surface. For example, a shiny dark colored jacket
may appear brighter than a light colored jacket with a dull surface.
Night vision does not present normal depth perception.
Night vision is very responsive to reflective ambient light; therefore, the light reflecting off of fog or
heavy rain causes much more light to go toward the night vision unit and may degrade its performance.
This is a faint hexagonal pattern which is the result of the manufacturing process.
black spots throughout the image area are also inherent characteristics of all night vision technology. These spots will remain
constant and should not increase in size or number. See example below of an image with black spots.
* Do not be concerned if
you see this feature-it is an inherent characteristic found in light amplification night vision systems that incorporate a
microchannel plate in the intensifier.
Prices and Specifications subject to change without
notice. Export of the commodities described herein is strictly prohibited without a valid export license issued by the U.S.
Department of State Office of Defense Trade Controls prescribed in the International Traffic in Arms Regulation (ITAR), Title
22, Code of Federal Regulation, Parts 120-130.
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the Night TM
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