The StealthView 2 night vision device transforms night into day. It is a very useful monocle for camping, caving, wildlife observation, fishing or a night out on a boat and surveillance.
Darkness is no longer a difficult situation to deal with. It will no longer be the sunset that will ruin the excursions. There StealthView series repels the screen of darkness through a built-in infrared illumination system and crisp, clear lenses.
With a maximum viewing distance that comes up to 700 ft. / 210 m, the StealthView 2 night vision device becomes irreplaceable for nature observation, fishing or a night out on a boat, caving and much more. This model has undergone a solid external rubber treatment to ensure long-lasting reliability.
But how does a night vision device work?
Let's try to give an explanation to this question, through an illustration of each component of the viewer itself and its capabilities.
First you need to specify what angle measurement is. The latter defines the field of view through a night vision system at a distance of 100 yards, equal to approximately 91,5 meters.
The Digital Night Viewers they collect the existing light through a lens and are processed with a type of electronics and a very sensitive image sensor: the images thus collected are transferred to a micro display (Type of flat LCD screen in which each pixel is controlled by one of the four transistors .
Micro display technology provides the best resolution of all flat panel techniques). Inside the night vision device is the CMOS: a chip that creates images of objects by converting light into electrons.
Bushnell's StealthView 2 digital night vision goggles use CMOS technology, which provides image resolution comparable to the second generation. The images are displayed on a color display and also have a video output port, in order to allow the transmission of digital video images to a camera, computer and / or television screen.
The night vision technology also works with infrared diodes: the StealthView 2 contains two infrared diodes to illuminate objects that are in complete darkness, where no light source is available. The diodes work continuously, while the IR projector can be turned on or off. The range of the IR projector is approximately 180 meters.
Available light (energy) is collected by the objective lens and focused on the image intensifier. Inside the intensifier, a photocathode is "stimulated" by light and converts the energy into electrons. The latter are subjected to acceleration through an electrostatic field inside the intensifier and hit a phosphor screen (such as a monochrome television), which emits a visible image. A gain is generated from this acceleration of electrons, that is, the weak natural light that allows you to see the image is amplified.
The photocathode converts light (photon energy) into electrons (electrical energy) which are amplified in an intensifier. The lens focuses the available light onto the photoelectric surface of the photocathode, which is stimulated and transmits electrons into the tube.
With the infrared (IR) illuminator, the system is supplied with a light source to be amplified, which allows images to be highlighted in very low or non-existent light conditions, such as in a cave, where there is no ambient light to be amplified. There are also integrated dual-level infrared illuminators.
These allow you to adjust the power of the infrared emission according to your needs: you get a powerful beam for lighting on a narrow point at a greater distance, and a weak beam for wide-angle lighting at shorter distances.
The image intensifier or intensifier tube is also installed inside the night vision goggles, which is an active component of a night vision system that amplifies the light and presents a useful image.
The lens, the eye of our viewer, collects all the available light and focuses it on the image intensifier. They magnify the image and are treated for maximum light transmission efficacy in the near infrared bandwidth.
Together with the objective, the focusing eyepiece works, used to adapt the monocular or binocular night vision device to the different visual abilities.
The component that transforms night into day is the phosphor screen. Located behind the intensifier tube, the green phosphor screen makes the night image visible. Green was adopted because it is the color to which the human eye is most sensitive.
Finally, resolution measures the ability to provide and display a detailed image. The resolution of the image intensifier remains constant and is expressed as the maximum number of line pairs per millimeter (lp / mm), which can be detected when a black and white banded pattern is projected onto the photocathode.
La first generation of Bushnell night vision goggles they did not require an active infrared light source. They only amplified the available ambient light.
With the second generation, inaugurated in 2010, sees among its jewels the Digital Night Viewer - StealthView. The StealthView contains two infrared diodes to illuminate objects that are in complete darkness, where no light source is available.
The features of this model are as follows :
CMOS image intensifier tube
LCD screen with color images instead of green
Over 100 yards / 23m range with 100m field of view
Adjustable eyepiece
Weather resistant
Works with 4 AA batteries
The dimensions, expressed in mm, are: 5.9 x 3.8 x 2.0 / 150 x 95 x 51. The p is equal to 430 gr.
The real novelty is the adoption of the color LCD screen of the new StealthView 2 monocle.
The US firm Bushnell constantly explores emerging technologies to adapt them to the optics market, combining cutting-edge design with the latest innovations.
The StealthView 2 night vision device will shed light in the darkness.
* Night vision goggles and the law:
Currently, the use of night vision goggles for hunting is limited exclusively to selective hunting aimed at containing and controlling certain species such as fox and wild boar as well as killing the so-called harmful. In all cases it is understood that all the necessary administrative authorizations are required from time to time.
WE REMIND OUR READERS THAT THE USE OF NIGHT VISORS IS NOT ALLOWED FOR VENATORY PRACTICE UNLESS EXPRESSLY AUTHORIZED !!!