MIL-PRF-49434A(CR)
3.7.3
Modulation.
The IAL shall project a continuous, unmodulated beam.
3.7.4 Output peak wavelength. The IAL shall have an output peak
wavelength of 840 nanometers, +10 / -20, at room temperature (see 3.15.2).
3.7.5 Spectral bandwidth. The IAL, at room temperture (see 3.15.2) and
with an input voltage of 3.0 Vdc, shall have a spectral bandwidth of no
greater than 8 nanometers (nm).
3.7.6
Boresight retention (BR).
3.7.6.1 Boresight retention-shock. The IAL, mounted on the M16 rifle
with the M16 bracket, shall retain a postfiring zero position within 0.5 mrad
of its prefiring zero position after discharging 300 rounds of ammunition.
3.7.6.2 Boresight retention-vibration. The IAL, mounted on a simulated
M16 rifle with the M16 bracket, shall retain a postvibration neutral position
within 0.5 mrad of its previbration neutral position after each of the three
axes is subjected to vibrations in a frequency range of 5 to 55 hertz (Hz)
with an amplitude of 0.100 inch total excursion for 30 minutes in each
direction.
3.7.7 Input current. The maximum dc input current of the IAL, at room
temperature (see 3.15.2), shall be 50.0 milliamperes (mA) for an input voltage
of 3.0 Vdc.
3.7.8 Controls and adjustments. All controls and adjustments shall
operate smoothly without loss of the intended settings or the presence of
backlash. Both the azimuth (AZ) and elevation (EL) adjuster knobs shall turn
6.0 rotations, +2.0 / -0.5, stop to stop, with audible and tactile detents. A
white circumferential dot shall appear on each adjuster knob. A sighthole,
for locating the white circumferential dot, shall be present at the front of
each adjuster knob cover. Adjuster flanges shall be marked to display the
bullet's "point-of-impact" movement during the zeroing procedure. The
relationship between adjuster knob rotation and point-of-impact movement shall
be regulated by the "left hand rule" (i.e., when moving the fingertips of a
cupped left hand in the direction of adjuster knob rotation, the left thumb of
the same hand points in the direction of the bullet's point-of-impact
movement).
3.7.8.1 Neutral Position. The white circumferential dot on each
adjuster knob, when set at the clockwise end-of-travel stop, shall be centerd
in the adjuster cover sighthole to within ±2 clicks. The "neutral position"
of each adjuster knob shall be three counterclockwise rotations from the
clockwise end-of-travel stop with the white dot centered in the adjuster cover
sighthole to within ± ½ click. When the AZ and EL adjuster knobs are both set
to the neutral position, the IAL beam shall be within 1.0 mrad of the optical
axis of the IAL.
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