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in the scene you are viewing.
(2) Emission Points. A steady or fluctuating pinpoint of bright light
in image area that does not go away when all light is blocked from
the objective lens of the monocular (Figure 2.5.). The position of an
emission point within the image area does not move.
Not all emission points make the MUNVM rejectable. Make sure
any emission point is not simply a point light source in the scene
you are viewing.
-
(3) Black Spots. These are cosmetic blemishes in the image in-
tensifier or dirt or debris between the lenses. Black spots are ac-
ceptable as long as they do not interfere with viewing the image.
(4) Fixed-Pattern Noise. This is usually a cosmetic blemish char-
acterized by a faint hexagonal (honeycomb) pattern throughout the
viewing area that most often occurs at high light levels or when
viewing very bright lights (see Figure 2.6.). This pattern can be
seen in every image intensifier if the light level is high enough. This
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EMISSION
POINTS
BRIGHT SPOTS
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