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ARMASIGHT by FLIR
PVS-14
U S E R M A N U A L
B. Emission points
Emission points are steady or fluctuating pinpoints of bright light in the image area that do not go away
when all external light is blocked from the objective lens (Figure 4-3). The position of an emission point
within the image area does not move. Not all emission points are cause to return the Spark. Verify that
emission points are not simply light sources present in the scene you are observing. Emission points are
acceptable if they do not interfere with the user’s ability to perform missions.
C. Black Spots
Black spots are cosmetic blemishes in the image intensifier or debris between the lenses. Black spots
are acceptable as long as they do not interfere with the user’s ability to observe the scene. No action
is required if this condition is present, unless the spots interfere with the operator’s ability to perform
missions.
D. Fixed-pattern Noise
Fixed-pattern noise is usually a cosmetic blemish characterized by a faint hexagonal (honeycomb) pattern
that appears throughout the viewing area. This typically occurs in excessively lit environments or when
viewing very bright lights (See Figure 4-4). This pattern can be seen in every image intensifier if the level
of light is high enough. This condition is acceptable as long as the pattern does not interfere with the
user’s ability to view an image or interfere with their ability to perform missions.
E. Chicken Wire
Chicken wire is an irregular pattern of dark thin lines that can appear in the field of view, either
throughout the image area or in sections of the image area (See Figure 4-5). In the worst-case scenario,
these lines will form hexagonal or square-wave shaped lines. No action is required if this condition is
present, unless it interferes with the user’s ability to view the image or their ability to perform missions.
FIGURE 4-4. FIXED-PATTERN NOISE
FIGURE 4-5. CHICKEN WIRE
