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|  MIL-P-48450A(MU}
appropriate adapter having the same interface features as Mount Periscope:
M118E1. The input coupling shall be immobilized to any position that shall
prevent it from contacting the travel stops during vibration. Prior to vi-
bration, the image intensifier tube and the reticle projector lamp shall be
energized in accordance with 3.4.3.2. After allowing a 15 second tube stabi-
lization period, the screen surface of the tube shall be illuminated and
the reticle pattern shall be projected into the optical system when observed
through the periscope eyepiece. The periscope shall then be vibrated in
accordance with the test procedure specified above and swept logarithmically
for the time period specified in 3.4.3.2. During each vibration sweep cycle,
the screen surface of the tube and the reticle pattern shall be monitored
to assure that there is no failure or flicker of light emission from the
image intensifier tube nor the reticle projector lamp. Immediately follow-
ing the vibration test, the periscope shall be subjected to the test. The
periscope shall be subjected to the tests in 4.6.3.5 through 4.6.3.6.2 in-
clusive. Periscopes that have passed the above tests shall then be subjected
to the tests specified in 4.6.4, 4.6.5, 4.6.3.7 and 4.6.3.8 respectively,
to determine overall conformance with 3.4.3.2.
NOTE:
Vibration testing of each head, daylight body and passive
elbow assembly is not required when the complete periscope
is subjected to vibration (see 3.1). A record of all data
(collimation, pre-vibration settings, etc.) necessary to
determine compliance with required performance shall be
available.
4.6.3.4 Shock.- Prior to performing this test, the periscope shall
be subjected to the test procedure specified in 4.6.3.1 and 4.6.3.1.1 to
determine compliance with 3.6.3. The shock equipment and test procedure
shall. be in accordance with Procedure I, of Method 516.2 specified in
MIL-STD-81O, except conditions such as "G" values, time duration and wave
form shock pulse shall be as specified in 3.4.3.3. The periscope shall be
clamped on the shock equipment by means of an appropriate adapter having
the same interface features as Mount Periscope: M118E1. Prior to shock,
the image intensifier tube and reticle projector lamp shall be energized in
accordance with 3.4.3.3. The input coupling shall be immobilized to any
position that shall prevent it from contacting the travel stops during the
shock test. After allowing a 15 second tube stabilization period, the
screen surface of the tube shall be illuminated and the reticle pattern shall
be projected into the optical system when observed through the periscope
eyepiece (passive). The periscope shall then be shocked in accordance with
the test procedure specified above, except the application of shock along
the vertical axis shall be in one direction only (normal operating position
of the periscope). Subsequent to each shock, the screen surface of the tube
and the reticle pattern shall be observed. During these observations, there
shall be no failure or flicker of light emission from the image intensifier
tube nor the reticle projector lamp. Immediately following the shock test,
the periscope shall be subjected to the tests in 4.6.3.5 through 4.6.3.6.2
inclusive. Periscopes that have passed the above tests shall then be sub-
jected to the tests specified in 4.6.4, 4.6.5, 4.6.3.7 and 4.6.2.8 respective-
ly, to determine overall conformance with 3.4.3.3.
NOTE:
Shock testing of each head, daylight body and passive
elbow assembly is not required when the complete
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