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Page Title:
Sight system and laser beam alignment |
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|  MIL-R-48595A(AR)
3.3.19 Sight system and laser beam alignment. (See 4.6.2.19)
3.3.19.1 Initial ali gnment. The laser transmitted beam shall be parallel
to the reticle centerline by not greater than 0.1 mil.
3.3.19.2 Aligiment retention. Established alignment of 3.3.19.1 shall
vary by not greater than 0.25 mil during exposure to the environmental
conditions specified in 3.4.
3.4 Environmental.
3.4.1 Shock. The rangefinder shall be capable of operating as specified
herein after exposure under the conditions of 3.1.3 to three half sine wave
shock pulses of 40 4 gravity unit (g) for a duration of 18 3 milliseconds
-
(msec) applied in each direction along three mutually perpendicular axes. In
addition, the rangefinder shall be capable of withstanding three half sine
wave shock pulses of 100.0 10.O g for a duration of 1.5 0.2 msec applied
in each direction along three mutually perpendicular axes. (See 4.6.3.1)
3.4.2 Vibration. The rangefinder shall be capable of operating as
specified herein after exposure under the conditions of 3.1.3 to the vibration
Duration of exposure shall be not less than 80
profiles of figure 1
minutes in each of three mutually perpendicular axes. (See 4.6.3.2)
3.4.3 Operating temperature. The rangefinder shall be capable of
operating as specified herein over the operating temperature range of -25F
to +125F. (See 4.6.3.3 and 4.6.3.4)
3.4.4 Storage temperature. The rangefinder shall be capable of operating
as specified herein after exposure to storage temperatures ranging from
-65F to 160F. (See 4.6.3.3 l nd 4.6.3.4)
3.4.5 Humidity. The rangefinder shall operate as specified herein at up
to 100 percent relative humidity. (see 4.6.3.5)
3.4.6 Altitude. The rangefinder shall operate as specified herein under
the following conditions:
during exposure to an atmospheric pressure equivalent to 10000
a.
feet above sea level.
b.
after exposure to an atmospheric pressure equivalent to 40000
feet above sea level for not less than 1 hour. (see 4.6.3.6)
3.4.7 Dust. The rangefinder shall operate as specified herein after
exposure to moving dust for not leas than 12 hours at velocities up to 1750
feet per minute. (See 4.6.3.7)
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