Technical data

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 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 icker or ash. If there is more than a single icker, check for a loose battery

adapter or a weak battery. If ickering continues, please contact Customer Support.

4.3.2 COSMETIC BLEMISHES

Cosmetic blemishes are usually the result of manufacturing imperfections. They do not aectthereli-

abilityoftheimageintensier,andarenotnormallyacauseforreturningtheCO-MR.However,some

types of cosmetic blemishes can worsen over time and interfere with the user’s ability to properly oper-

ate the device during missions. If you believe a cosmetic blemish is cause for returning the device, re-

cord the specic nature of the problem on the maintenance forms and use the clock method to identify

the position of the blemish and its 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:

A. Bright Spots

Abrightspotisasmall,non-uniformbrightareathatmayickerorappearconstant(Figure4-3).

Not all bright spots make the CO-MR returnable. Cup your hand over the lens to block out all light. If the

bright spot remains, please contact Customer Support.

Bright spots usually go away when all light is blocked out. Verify that any bright spots are not simply the

result of bright light in the area you are observing. Bright spots are acceptable if they do not interfere

with the user’s ability to view the scene or perform missions.