Armasight NSCCOMINI139DA1 CO-Mini GEN 3+ Alpha MG Night Vision Mini Clip-On System - Manual (Page 32)

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A. Shading
If shading is persistent, you will not be able to see a fully circular image (Figure 4-1). Shading is a very
dark, high-contrast area with a distinct line of demarcation present, and you cannot see an image
through it. Shading always begins on the edge and will eventually migrate inward until it spans across
the entire image area. If you notice shading with your device, please contact Customer Support.
SHADING
FIGURE 4-1. SHADING
NOTE:
Verify that any shading is not the result of improper eye-relief adjustment.
B. Edge Glow
Edge glow is a bright area (it sometimes appears to be coloring) in the outer portion of the viewing area
(see Figure 4-2). To check for edge glow, block out all light from the device by cupping a hand over the
lens. If the image intensifier tube is displaying edge glow, the bright area will still show up; if edge glow
occurs please contact Customer Support.
EDGE
GLOW
FIGURE 4-2. EDGE GLOW
C. Flashing, Flickering, or Intermittent Operation
The image may appear to flicker or flash. If there is more than a single flicker, check for a loose battery
adapter or a weak battery. If flickering continues, please contact Customer Support.
4.3.2 COSMETIC BLEMISHES
Cosmetic blemishes are usually the result of manufacturing imperfections. They do not affect the reli-
ability of the image intensifier tube, and are not normally a cause for returning the CO-MINI. However,
some types of cosmetic blemishes can worsen over time and interfere with the user’s ability to properly
operate the device during missions. If you believe a cosmetic blemish is cause for returning the device,
record the specific nature of the problem on the maintenance forms and use the clock method to iden-
tify the position of the blemish and approximate distance from the center (e.g., 5:00 toward the outside,
2:30 near the center, or 1:00 midway).
The following are examples of cosmetic blemishes: