MIL-P-45651B(MU)
the reticle boresight point the distance as
4.5.7.6 Torque, input coupling. The torque
specified in 3.9.2 when measured on the
required to rotate the input coupling
through the specified excursion shall be
target.
measured using standard measuring equip-
4.5.8.3 Azimuth knob trarel. Perform this
ment affixed to the coupling. The measured
test as specified in 4.5.8.2. Knob travel shall
torque shall not exceed the value specified
meet the requirements specified in 3.9.3.
in 3.8.5 for the temperatures indicated in
3.4.2.
4.5.8.4 Reticle shift. This test shall be
conducted concurrently with the tests speci-
4.5.7.7 Resolution (8 power and unity
fied in 4.5.8.1. During rotation of the knobs,
power system). This test shall be performed
the reticle boresight point shall not shift
utilizing an auxiliary telescope of at least 3
perpendicular to the line of sight more than
power, a resolving power chart (on a target
the tolerance specified in 3.9.4.
or in a collimator projector) representing
the angular subtense for the seconds of are
4.5.8.5 Backlash. With backlash excluded
specified for resolution, and a supporting
for direction of travel, record position Of
medium to receive this test equipment as
knobs and line of sight. Rotate the knob
well as the item to be tested. The test method
one-half of a revolution: then, with backlash
and procedure shall be in compliance with
included, return the knob to the recorded
the Resolution Test specified in Specification
position without overtravel and record posi-
MIL-O-13830. The resolving power chart
tion of the line of sight. The difference be-
shall contain 4 sets of lines as shown in
tween the two recorded positions of the line
Figure 1 of Specification MIL-O-13830. The
of sight is the amount of backlash. Backlash
limit of resolution shall be within the value
shall not exceed the tolerance specified in
specified for the unity power and 8 power
3.9.5.
system in 3.8.6 and 3.9.11, respectively, as
4.5.8.6 Disengagement of boresight locks.
determined by viewing through the auxiliary
The force required to disengage the bore-
telescope.
sight lock from the locked position shall be
measured with standard measuring equip-
4.5.8 Body assembly, 8 power visual. The
following tests shall be conducted with the
ment. The measured force shall not exceed
the value specified for the temperature indi-
body assembly secured in special testing
cated Slip scales shall be manually tested
equipment that shall position datum plane
at the temperatures indicated and shall meet
X vertical and reference line Y horizontal.
the requirements specified in 3.9.6.
The equipment shall permit a line of sight
through the reticle boresight mark of the
4.5.8.7 Torque, boresight knobs and diopter
body assembly to be directed to a collimator
adjustment. The torque required to rotate
type target. The target shall permit accurate
the boresight knobs and diopter adjustment
measurement of the applicable characteris-
shall be measured with standard measuring
tics of the body.
equipment affixed to the boresight knobs and
diopter adjustment. The measured torque of'
4.5.8.1 Collimation. Adjust the line of
the boresight knobs and diopter adjustment
sight through the reticle boresight mark
shall not exceed the value specified in 3.9.7
coincident to the intersection of the hori-
and 3.9.12.3 at the temperatures indicated
zontal and vertical target line image, within
in 3.4.2.
the tolerance specified in 3.9.1, by means of
the boresight knobs.
4.5.8.8 Reticle illumination. This test shall
be conducted with the reticle lamp energized
4.5.8.2 Elevation knob travel. From the
by a 24-volt d-c source. This source shall
position established in 4.5.8.1, rotate the
contain a rheostat for varying reticle illumi-
knob to its clockwise stop then its counter-
nation for best definition. The reticle mark-
clockwise stop. This knob rotation shall move
9
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