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|  MIL-P-48571(MU)
3.8.3.1 Pre-Vibration/Pre-Shock Setting.- Rotate daylight and passive
boresight knobs to establish coincidence of each boresight cross with the
incoming line of sight (see 3.8.3a) prior to meeting requirements of 3.6.
3.8.3.1.1 Daylight viewing area.-
a. Elevation knob travel.- The boresight knob shall provide a mini-
mum travel of 5.0 mils up and 8.0 mils down from the collimation setting
of 3.8.3a.
b. Deflection knob travel.- The boresight knob shall provide a
minimum travel of 6.5 mils in each direction from the collimated setting
of 3.8.3a.
c. Line of sight variation.- Variation in the line of sight in
elevation, as the deflection knob is rotated by at least 6.5 mils in each
direction from the collimated setting of 3.8.3a, shall not exceed 0.1 mil
(total variation not to exceed 0.2 mil).
3.8.3.1.2 Passive viewing area.
a. Elevation knob travel.- The boresight knob shall provide a mini-
mum travel of 6.5 mils in elevation and depression from the collimated sett-
ing of 3.8.3a.
b. Deflection knob travel.- The boresight knob shall provide a
minimum travel of 6.5 mils in each direction from the collimated-setting
of 3.8.3a.
c. Line of sight variation.- Variation in the line of sight in
elevation, as the deflection knob is rotated by at least 6.5 mils in each
direction from the collimated setting of 3.8.3a shall not exceed 0.3 mil
(total variation not to exceed 0.6 mil).
3.8.3.2 Post-Vibration/Post-Shock Collimation.- The original collima-
ation settings established in 3.8.3.1 shall not deviate more than 0.3 mil
(including fixture error) as observed through eyepiece subsequent to meet-
ing requirements of 3.6.
3.8.4 Collimation repeatability.
-
3.8.4.1 Assembling daylight body and Passive elbow to head assembly.-
The daylight body and passive elbow assemblies shall be capable of repeat-
ing an original line of sight within 0.20 mil when removed and reinstall.
(a minimum of 3 times) into the head assembly.
3.8.5 Image tilt - daylight and passive.- The image of a target line
which is originally parallel to Datum Plane "J" shall emerge from the eye-
piece parallel to this same surface within 2.0 degrees of arc.
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