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MIL-P-48450A(MU)
periscope is subjected to shock (see 3.1). A record
of all data (collimation, pre-shock settings, etc.)
necessary to determine compliance with required per-
formance shall be available.
4.6.3.5 Post-vibration/Post-shock.- Immediately following vibration/
shock, the periscope shall again be subjected to the test procedure speci-
fied in 4.6.3.1 and then to the tests in 4.6.3.5.1 and 4.6.3.5.2. Insure
that the boresight knob scales are not disturbed from the original setting
obtained in 4.6.3.1.  Subsequent to the test in 4.6.3.5.1 and 4.6.3.5.2,
the periscope shall be thoroughly examined for physical defects resulting
from poor workmanship and materials to determine compliance with 3.4,3, prior
to being subjected to the remaining tests specified herein. A visual examina-
tion shall also be made for missing or damaged parts, glass chips, foreign
matter and bonding (separations, chipping or rupture).  An audible examination
shall be made for loose internal optical and mechanical components. Any
one of the possible defects defined above shall be cause to consider a
periscope defective.
4.6.3.5.1 Post-vibration/Post-shock collimation, passive reticle setting.-
Observe through the eyepiece assembly (passive) and adjust by means of the
boresight knobs to obtain coincidence of the periscope reticle boresight
cross with the target image lines.  Boresight knob adjustment shall not
exceed the tolerance specified in 3.6.3.2, as measured on the boresight
knob scale. Record collimation setting for use in the tests in 4.6.3.6.2.
4.6.3.5.2 Post-vibration/Post-shock collimation; daylight viewing area.-
Perform this test in accordance with 4.6.3.1.1 Any difference from the
recorded measurements established in 4.6.3.1.1 shall not exceed the toler-
ance specified in 3.6.3.2, as measured on target.  Record collimation
measurement for use in the test in 4.6.3.6.1.
4.6.3.6 Collimation repeatability.
4.6.3.6.1 Assembling daylight body to head assembly.- Perform this
test subsequent to the test in 4.6.3.5.2.  Remove the daylight body from
the head assembly.  Repeated removal and installation (a minimum of three
times) shall be performed.  The periscope shall be inspected after each in-
stallation for repeatability of the daylight collimation measurement recorded
in 4.6.3.5.2.  The periscope shall meet the requirements of 3.6.4.1, as meas-
ured on the boresight knob scales.
4.6.3.6.2 Assembling p assive elbow to head assembly.- Perform this
test subsequent to the test in 4.6.3.5.1.  Remove the passive elbow from
the head assembly.  Repeated removal and installation (a minimum of three
times) shall be performed.  The periscope shall be inspected after each in-
stallation for repeatability of the passive collimation setting recorded in
4.6.3.5.1.  The periscope shall meet the requirements of 3.6.4.1, as measured
on the boresight knob scales.
4.6.3.7 Modules.- Subsequent to the examinations and tests on the peri-
scope, the head, body and elbow assemblies shall be separated and separately
subjected to the "post-vibration" requirements and tests specified in their
respective module specifications identified in 3.1. Subsequent to meeting
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