Zeroing Operational Defects; Shading - ATN Mars 2 Operator's Manual

3.1. ZEROING OpERATIONAl
DEfEcTS
operational defects refer to the reliability of the image intensifiers
and are an evidence of instability. their identification shall be a
valid reason to immediately refuse to accept the atn Mars. these
include shading, edge glow, flashing, flickering, and intermittent
operation.

3.1.1. SHADING

If shading is persistent, you will not see a fully circular image
(Figure 3-1). Shading is very dark and you cannot see an image
through it. Shading always begins on the edge and migrates in-
ward eventually across the entire image area. Shading is a high
contrast area with a distinct line of demarcation. Contact atn or
point of purchase for warranty/repair procedures.
SHADING
NOTE
Make sure the shading is not the result of improper exit pupil
position.
3-2
fIGURE 3-1. SHADING