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|  MIL-T-50782(MU)
4.7.1 Orientation. - Proper orientation of the panoramic telescope
is assured when mounted and secured to an adapter, the accuracy of
which shall be equal to or better than the accuracy depicted on Drawing
F8599913, and when aligned as outlined in set-up instructions specified
on Drawing F8599913. With the panoramic telescope positioned on the the
fixture as outlined above the line of sight, elbow assembly, counters
and the click mechanism shall be set as specified in 3.6.
4.7.2 Collimation.
4.7.2.1 Pre-vibration. - With telescope positioned as outlined in
4.7.1, observe coincidence between the panoramic telescope line of
sight and the optical axis of the test reticle (target) in the collimator
projector. This coincidence must be within the limits outlined in
3.7.1.1. 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 performed as
outlined in Procedure V of MIL-F-13926; however. the duration shall be
as specified in 3.3.3. 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 3.3.3
4.7.2.1.2 Post vibration. - Immediately after completing the vibration
test, re-assemble the telescope to the adapter and without disturbing
any preoius 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 3.7.1.2.
4.7.2.1.3 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.
4.7.2.1.4 Image tilt. - With the panoramic telescope and fixture
positioned as outlined in 4.7.1, image tilt shall be observed by sight-
ing through Collimator F5549108 aligned to the optical axis of the eye-
piece 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 the 3.7.2. Repeat this test With
the elbow assembly against each of the stops to assure conformance with
3.7.2. Again observe parallelism between the reticle lines. Repeat
this test at eight different azimuth counter settings in 6400 roils of
rotation. Each setting in azimuth will require the azimuth fixture plate
to be rotated an equal amount in an opposite direction to permit
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