2.1 SYSTEM DESCRIPTION
The ATN NVM-14 is a hand-held, head-mounted, helmet- mounted, or weapon-mounted night vision system that enables walking, driving, weapon firing, short-range surveillance, map reading, vehicle maintenance, and administering first aid in both moonlight and starlight. Each unit allows for vertical adjustment (by using head straps), fore-and-aft adjustment, objective lens focus, and eyepiece focus. The device is also equipped with an infrared light-emitting source.
NVM-14 Night Vision monocular utilizes the principle of intensi- fication of the residual light which is reflected from the surround- ing objects. The optical system of the monocular consists of: an objective lens, an image intensifier tube and an eyepiece.
Even under unsteady brightness conditions, Automatic Bright- ness Adjustment System always keeps the IIT brightness level constant.
The Automatic Protective System controls the existing illumina- tion level through the photo receiver. If the illumination level sur- passes 100-300 lx for the following 10 seconds, the monocular will shut off automatically
Built-in IR Illuminator makes it possible to observe the objects when the monocular works in the conditions of low light or total darkness.
The eyepiece incorporates several LED indicators:
-RED – serves as an IR Illuminator Indicator and an Battery Low Indicator at a time. IR is on when the indicator light becomes stable. If the indicator light starts flickering, it means there might be about 20% of battery charge left.
-GREEN – serves as an Excessive Brightness Indicator. If the bright light remains unchanged for over 10 seconds after the indicator turns on, the monocular will automatically shut-off. If you move the unit away from the bright/excessive light the unit will turn back on again.
