6 AGM Global Vision
1 GENERAL INFORMATION
1.1 SYSTEM DESCRIPTION
The PVS-14 is a handheld, head-mounted, helmet mounted, or weapon-mounted night vision system
that enables the user to operate the device in moonlit or starlit conditions. The PVS-14 allows
hands-free operation (if needed), including walking, use of weapons, short-range surveillance,
map reading, vehicle maintenance, and the administration of first aid. Each unit includes both
objective lens and eyepiece focus and can be adjusted either vertically and horizontally (using
head or helmet mount). The monocular is also equipped with manual gain control, an IR source,
and a low battery indicator. A bright light cutoff feature shuts off power to the device when they
are exposed to excessive levels of light for more than 70 (±30) seconds.
1.2 OPERATION PRINCIPLES
1.2.1 MECHANICAL FUNCTIONS
The PVS-14 includes mechanical adjustments to accommodate physical differences between
individual users. Functional features include the power switch, gain control, diopter adjustment,
objective lens focus, release latch, eye relief adjustment. The mechanical controls are identified
in Figure 1-1.
1.2.2 OPTICAL FUNCTIONS
The optical functions include an objective lens, image intensifier, and eyepiece lens. The objective
lens collects light reflected from the moon, stars, or other ambient light in the environment, and
inverts and focuses an image of the scene onto the image intensifier. The image intensifier converts
the captured light into a visible image, re-inverting it so that can be viewed though eyepiece lens.
OBJECTIVE
LENS
EYEPIECE
LENS
POWER
SWITCH
GAIN
CONTROL
BATTERY
CAP
FIGURE 1-1. MECHANICAL FUNCTIONS FOR PVS-14
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