Technical data

(2) Emission Points. A steady or uctuating 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 3-5). The position of an

emission point within the image area does not move.

Not all emission points make the MUNVM returnable. Verify that any emission points are not simply a

point light source in the distance of the scene you are viewing. Emission points are acceptable if they

do not interfere with the operator’s ability to view the image or to perform the mission.

(3) Black Spots. These are cosmetic blemishes in the image intensier, or dirt or debris between the

lenses. Black spots are acceptable as long as they do not interfere with the operator’s ability to view the

image. No action is required if this condition is present, unless the spots interfere with the operator’s

ability to view the image or to perform the mission.

(4) Fixed-Pattern Noise. This is usually a cosmetic blemish characterized by a faint hexagonal (honey-

comb) pattern throughout the viewing area. This most often occurs when operating in highly lit envi-

ronments or when viewing very bright lights (see Figure 3-6). This pattern can be seen in every image

intensier if the level of light is high enough. This condition is acceptable as long as the pattern does

not interfere with the operator’s ability to view the image or to perform the mission.

(5) Chicken Wire. An irregular pattern of dark thin lines in the eld-of-view either throughout the im-

age or in parts of the image area (see Figure 3-7). In the worst cases, these lines will form hexagonal or

square, wave-shaped lines. No action is required if this condition is present, unless it interferes with the

operator’s ability to view the image or to perform the mission.

Figure 3-6. Fixed-Pattern Noise

Figure 3-7. Chicken Wire

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