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|  MIL-T-50382(MU)
jector. This coincidence must be within the limits outlined in 3.7.1.
Record this position. Exercise care not to move the setting of the
panoramic telescope.
4.7.2.1.1 Vibration. - This test shall be performed using a testing
device, the accuracy of which shall be equal to or exceed the accuracy
depicted on Fixture Drawing F7560085. The test shall be perfomed as
outlined in Procedure V of MIL-F-13926; however, the duration shall be as
specified in 3.4.3. At the conclusion of the test, the telescope shall
be subjected to a visual and tactile examination and shall be subjected
to the following performance test to determine conformance with 3.4.3.
4.7.2.1.2 Post vibration. - Immediately after completing the vibration
test, reassemble the telescope to the adapter and without disturbing any
previous settings, observe where the panoramic telescope's optical line
of sight falls upon the projector collimator reticle. This observed point
and the recorded position (4.7.2.1) shall coincide within the limits
specified in 3.4.3. Close the cover and observe where the line of sight
falls with respect to the recorded position of the optical axis. They
must coincide within the limits outlined in 3.4.3.
4.7.2.1.3 Image wander. - With the cover opened and with the telescope
positioned as outlined in 4.7.1, rotate the telescope azimuth mechanism
in one direction to any azimuth setting and rotate the azimuth mechanism
of the test fixture an equal amount in the opposite direction. Now,
observe coincidence between the optical axes. Non-coincidence between
the axes shall not exceed an 18 mil spread to assure compliance with
3.7.2.1. This spread to be measured on the panoramic telescope reticle.
4.7.2.1.4 Cleanliness. - The panoramic telescope shall be tested for
cleanliness by using the shadowing technique outlined in MIL-O-13830.
At the conclusion of this test, dirt particles shall not exceed the
limits outlined in 3.5.
4.7.2.1.5 Image tilt. - With the panoramic telescope and fixture
positioned as outlined in 4.7.1, image tilt shall be observed by sighting
through Collimator F5549108 aligned to the optical axis of the eyepiece
assembly and note parallelism between its vertical reticle line and the
vertical line of the collimator target. Both lines shall be parallel
within the limits provided on the projected target (collimator reticle)
to assure conformance with 3.7.2. Repeat this test with the elbow
assembly against each of the stops to assure conformance with 3.7.1.4.
Again observe parallelism between the reticle lines. Repeat this test
at eight different azimuth counter settings in 6400 mils of rotation.
Each setting in azimuth will require the azimuth fixture plate to be
rotated an equal amount in an opposite direction to permit reestablishing
the line of sight to the position observed in 4.7.2.1.2. All readings
are to be within the limits outlined in 3.7.1.4.
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