|
Q. How does Night Vision work?
All the night vision products work in same manner. They collect the light through the objective lens and amplify that. Then it is focused on the image intensifier. A photocathode is present inside the intensifier. It is exited with falling of light. It converts the photon energy into electrons. These electrons accelerate across an electrostatic field inside the intensifier and strike a phosphor screen which emits an image that you can see. It is the acceleration of electrons, which provides gain and enhances the image.
Q. What is Night Vision used for?
A. Recreational uses consist of camping, hiking, fishing, boating, and nature viewing. Other uses include surveillance, search and rescue, and property management.
Q. Aren't all Night Vision products the same?
A. No. Night Vision Instruments come from proven Leaders and Innovator in the Sports Optics Industry.
Q. What is the effective range of night vision?
A. It varies anywhere from 1-1800 feet. The maximum viewing distance depends on the conditions of use and upon model chosen. 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.
Q. Why isn't there more magnification in a night vision device?
A. The more you magnify the more light you lose.
Q. How do I use Night Vision device in extremely low light or no-light conditions?
A. All night vision devices need some available light to work. It is possible to see a bright image in low light or no light conditions with the use of an Infrared Illuminator.
Q. since a night vision device is sensitive to Infrared (IR) light, can it detect heat?
A. Night vision devices operate as a light amplifier for light in the "near visible" light" range. Generally, this is in the 750-850 nanometer range. It can not detect heat, which is at a much lower end of the light spectrum and requires thermal imaging technology.
Q. What type of light source can be harmful to a night vision device?
A. Night Vision devices are designed for use in the dark. It may be harmful and can damage the device if you use it during the daytime or in other very bright situations. Keep in mind that strong direct light, such as projectors, car headlamps, strong flashlights, and so on, may be harmful to your night vision unit if you direct your device at the source of these intense lights. Most of these are simple turn off overload circuits, but some have more sophisticated and separate light sensing mechanisms.
Q. What's inside a night vision scope?
A. A night vision scope is made up of a set of optics (glass), a simple power supply (batteries, wire, transformer, regulators and capacitors) and an image intensifier (a glass vacuum tube with a light sensitive coating at one end and a phosphor screen at the other).
Q. Are Night Vision devices safe?
A. Yes. All Night Vision products include shield-encased image intensifiers to block x-rays. All infrared illuminators utilize harmless filtered incandescent bulbs or light emitting diodes (LED's) instead of lasers.
Q. What is the warranty for Night Vision devices?
A. Night Vision products are unquestionably warranted to be free of defects in material and workmanship for two years after the date of purchase. In the event of a defect under this warranty,
|
|
