System Description - ATN PS-15 Operator's Manual

2.1 SYSTEM dESCRIPTION

The ATN PS-15 is a hand-held, head-mounted or helmet-
mounted night vision system that enables walking, short-range
surveillance, map reading, vehicle maintenance, and adminis-
tering 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.
Optional 3X Afocal Lenses makes the ATN PS-15 into binocular
with enhanced range performance.
PS-15 Night Vision goggles utilize the principle of intensifica-
tion of the residual light which is reflected from the surrounding
objects. The optical system of the goggles consists of: an objec-
tive 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 goggles will
shut off automatically. If you move the unit away from the bright/
excessive light the unit will turn back on again. The Automatic
Protective System can be switch off for test the unit in the day-
light with protective cups on the lens.
Built-in IR Illuminator makes it possible to observe the objects
when the goggles work in the conditions of low light or total dark-
ness.
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
2-2