The primary difference between the two generations is the photocathode. Generation 2 uses a multi alkali photocathode while Generation 3 uses gallium Arsenide. Gallium Arsenide provides a significant increase in photoresponse and tube life. Other differences in performance will be image tube resolution, tube gain and signal to noise ratio. Therefore Generation 3 offers greater clarity but is generally more expensive than Generation 2.

The following sections refer to Sony's ATRAC. Sharp and Matsushita (among others?) have developed ATRAC chips of their own, though rather little has been made public about their evolution. While all manufacturer's ATRAC versions interoperate and are based upon Sony's original specification, it is not possible to compare their version numbers.

The key to Lasik is weeding out the small percentage of people who are simply not good candidates -- huge pupils and high degrees of correction combined with excellent night vision prior to the procedure. There are four criteria that Dr.

The objective lens of night vision devices collects light that you can not see with your naked eye and focuses it on the image intensifier. This technology relies on the amplification of near infrared and visible light. If there is no available light to intensify, the night vision devices will not be usable. Many night vision devices have a built-in near infrared LED to produce additional light source; however, the use of an illuminator may be undesirable in a covert operation.

The large majority of Gen. 1 and Gen. 1+ night vision products sold in the US are of Russian origin, packaged and branded locally, usually by large optical manufacturers. The United States produces primarily Gen 2 and Gen 3 night vision technology, which is employed by and large by the military and other governmental organizations, and far out of the reach of most consumers' budget. Russia is the largest producer of Gen 1 and Gen 1+ image intensifiers in the world.

Generations refer to technological peculiarities that lead to difference in performance. Since its appearance, night vision has developed in the direction allowing people to see better and sharper image at lower light levels. The technological leaps on that way are called Generations. Contemporary market comprises the following main gradations: Gen. 1 (consumer quality products), Gen. 2 (obsolete technology, widely spread in 80s, but still present for economical reasons), Gen. 2+ and Gen.3.

In the initial 2-4 month period following your procedure it is normal to have some degree of night glare due to the healing process. If you have very large pupils and the doctor feels you may be at risk for ongoing night vision problems, he or she may recommend against having LASIK.

The primary difference between the two generations is the photocathode. Generation 2 uses a multi alkali photocathode while Generation 3 uses Gallium Arsenide. Gallium Arsenide provides a significant increase in photoresponse and tube life. Other differences in performance will be image tube resolution, tube gain and signal to noise ratio. Therefore Generation 3 offers greater clarity but is generally more expensive than Generation 2.

The blueberry and northern European myrtle berry are related species. Therefore, they are roughly equivalent. Frozen blueberries are great because the cell walls are partially broken down. Diabetics are wise to take the sugar-free supplement. However, I have seen more immediate and more sustained results using my vitamin, Able Eyes, which is a combination of all items that enhance your vision. See the archived tip on Night Vision. Give it a try.

Night Vision products collect and amplify existing light through the objective lens which is then focused on the image intensifier. Inside the intensifier, a photocathode is "excited" by the light and converts the photon energy in to electrons. These electrons accelerate across an electrostatic field inside the intensifier and strike a phosphor screen (like a green monochrome TV screen) which emits an image that you can see.

It varies anywhere from 10-400 feet, and with a weapons adapter, or a dedicated weapon scope, the range can be well over 400 yards. The maximum viewing distance depends on the conditions of use. Overcast conditions, fog, rain; etc. may reduce the effective distance of a night vision. An Infrared Illuminator will increase viewing range, especially in enclosed areas like a warehouse, cave, or thick brush. The Infrared illuminator will not be effective at long ranges when using weapons scopes.

Yes. Night Vision products include shield-encased image intensifiers to block x-rays. Infrared illuminators utilize harmless filtered incandescent bulbs or light emitting diodes (LED's) instead of lasers.

The number one damage factor is using the device in bright light. Over exposure will shorten the life span of a night vision device. Exposure to rain, fog, or even extremely high humidity may damage night vision devices. Built for use at night, they can withstand short exposure to dampness or high humidity conditions. Night Vision devices have delicate vacuum intensifier tubes that are sensitive to impact and should be handled carefully. Clean lenses the same way you would your camera.

Not without a proper license from the US State Department or the Department of Commerce. Please contact US Night Vision Corporation with any questions regarding the export of night vision.

Night Vision products are unquestionably warranted to be free of defects in material and workmanship. Warranty: Please retain your original invoice for warranty issues. US Night Vision Corporation will provide a registration card with all Generation 2 & 3 systems, please fill out the card in its entirety and mail back to US Night Vision Corporation. Generation 1 systems will be tracked by serial number and the warranty period will start at the date of the end user purchase.

No. Night Vision products are sensitive to impact and should be treated as, for example, a photographic camera, or a camcorder.

In general no. Exposure to water and other liquids and even high humidity may damage night vision devices that are not specifically protected against these elements. All our models are weather resistant, which means they can withstand short exposure to light rain or high humidity conditions.

Night Vision Projector is a device sending out invisible infrared light to compensate the light for the camera. Usually, the light requirement for B/W camera is very low. Some light coming from a dim light bulb or a corridor lamp is already sufficient. If you want to take video from a location where the light is very dim or no light at all, then you need to install an Infrared Night Vision Projector, or a camera with built-in infrared lights.

Infrared night vision allows cameras to see in the dark. It is the method of using IR LEDs (Infrared Light Emitting Diodes) as illumination for a camera with a sensor that can see infrared light. Infrared light provides the illumination needed to capture clear images in total darkness or low-light conditions.

Consider the distance you need to look through and the overall area you are observing or searching. For most surveillance or search applications, the higher the magnification or narrower the field of view, the more difficult it is to scan the area to avoid missing important objects or events. Usually a 1:1 lens with a 40° field of view provides optimal performance. For long-range observation or weapon sight applications, the magnification number will vary.

Many eyeglass wearers have severe glare, star bursts, and halos when driving at night. There is a treatment that is available known as anti-reflective coating. Anti-reflective coatings are typically standard in Europe. The coatings available today are significantly better than those of 20 years ago. Today's coatings have much better performance and durability.

In general, night vision devices are widely used for among others: law enforcement and security; self-defense; hunting; camping and hiking; wildlife viewing; boating and maritime.