MIL-DTL-48558C
4.9.4 Resolution. To perform this test, a wall target containing the appropriate
resolution test pattern shall be employed. Construction of the resolution target and the
method of inspection shall be as outlined in MIL-PRF-13830. During this test, the
telescope may be supported in a "V" block and packing shims may be used to position it.
The telescope must resolve the test pattern within the limits specified in 3.9.4 when using
an observation telescope of at least 3 power and an entrance pupil of at least 0.4 inches.
4.9.5 Cleanliness. The unit under test shall be subjected to the test procedures
outlined in MIL-PRF-13830 for conformance to the requirements of 3.9.5.
4.10 Operability.
4.10.1 Torque of diopter adjustment. The running torque of the diopter adjustment
shall be tested by use of a torque wrench and appropriate adapter at the temperatures
specified in Table II for compliance with the requirements of 3.10.1.
4.10.2 Attachment. When the telescope is stabilized at the operating temperatures
during 4.5.2, the elbow telescope shall be placed on fixture 10558254 or equivalent, fully
secured using the locking mechanism, and then subsequently removed without the use of
tools to verify conformance with the requirements of 3.10.2.
4.11 Reticle illumination. Place the instrument in a dark room having a controlled
light source. The observer and the instrument must be dark adapted. Prior to performing
the test, place a white, matted surface approximately 2 feet from the telescope window and
install a fresh battery in the telescope. Perform the test by observing the reticle pattern and
determine that this pattern is clearly discernible by means of the internal light source while
in the dark room. Gradually raise the level of illumination to where the reticle pattern
becomes indiscernible. Place a fixed stop having an aperture of one-half inch over the
objective window and observe that the reticle pattern is again clearly discernible by means
of the internal light source.
4.12 Interchangeability. The interchangeability gage 11747956 shall be applied to
the mounting surfaces of the telescope to assure maximum fit condition. The gage shall be
firmly seated without binding, fully secured using the locking mechanism, and
subsequently removed, to meet the requirements specified.
4.13 Workmanship. Workmanship of the elbow telescope shall be verified in
accordance with MIL-F-13926 and MIL-PRF-13830.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as
specified in the contract or order (see 6.2). When packaging of materiel is to be performed
by DoD or in-house contractor personnel, these personnel need to contact the responsible
packaging activity to ascertain packaging requirements. Packaging requirements are
maintained by the Inventory Control Point s packaging activities within the Military
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