Armasight NAM601500126DH1 PVS14/6015 GEN 2+ HD Multi-Purpose Night Vision Monocular - Manual (Page 27)

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NOTE :
Always verify that shading is not the result of improper eye-relief adjustment (refer to para-
graph 3.4.2).
(2) Edge Glow. Edge glow is a bright area (sometimes sparkling) in the outer portion of the viewing
area (see Figure 3-4).
To check for edge glow, block out all light by cupping a hand over the objective lens. If the image in-
tensifier is displaying edge glow, the bright area will still appear. If edge glow occurs, you will need to
return the MUNVM to the manufacturer.
(3) Flashing, Flickering, or Intermittent Operation. The image may appear to flicker or flash. If there
is more than one flicker, check for a loose battery cap or weak battery. If weak or loose batteries are not
the issue, you will need to return the MUNVM to the manufacturer.
c. Cosmetic Blemishes
These are usually the result of manufacturing imperfections that do not affect intensifier reliability,
and are not normally a cause for returning an MUNVM. However, some types of blemishes can get
worse over time and interfere with the user’s ability to perform the mission. If you believe a blemish
is cause for returning the device, record the specific nature of the problem on the maintenance forms
and identify the position of the blemish by using the clock method and approximate distance from
the center (e.g., 5 o’clock toward the outside, 2:30 near the center, or 1:00 midway). The following are
cosmetic blemishes:
(1) Bright Spots. A bright spot is a small, non-uniform, bright area that may flicker or appear constant
(Figure 3-5). Not all bright spots make the MUNVM returnable. Cup your hand over the objective lens to
block out all light. If the bright spot remains, you will need to return the MUNVM to the manufacturer.
Bright spots typically disappear when all light is blocked out. Verify that any bright spots are not simply
a bright area in the scene you are viewing. Bright spots are acceptable if they do not interfere with the
operator’s ability to view the image or to perform the mission.
EDGE
GLOW
Figure 3-4. Edge Glow
EMISSION POINTS
BRIGHT SPOTS
Figure 3-5. Bright Spots and Emission Points