MIL-DTL-11352 Block, Vision: Bullet-Resistant \(Metric\)This specification covers bullet-resistant vision blocks of two different types of construction, designed for use in combat type vehicles. In addition, this specification covers vision blocks with and without laser protection filters \(see 6.1\).

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MIL-DTL-11352K(AT)

1.15P

Ideal sawtooth pulse

Tolerance limits

0.07D

0.15P

0.2P

0.05P

Ref. line

-0.15P

zero (g)

-0.05P

-0.2P

0.4D

P = Peak value = 40 g

D = Nominal duration = 11 ms

NOTE:

The oscillogram shall include a time about 3D long with a pulse located approximately

in the center. The peak acceleration magnitude of the saw-tooth pulse is P and its

duration is D. The measured acceleration pulse shall be contained between the broken

line boundaries and the measured velocity change (which may be obtained by

integration of the acceleration pulse) shall be within the limits of Vi + 0.1Vi, where Vi

is the velocity-change associated with the ideal pulse, which equals 0.5PD. The

integration to determine velocity change shall extend from 0.4D before the pulse to

0.1D after the pulse.

FIGURE 1. Terminal-peak saw-tooth shock pulse configuration and tolerance limits.