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)

Tolerance limits

1.15A

Sine wave translated

down to 0.15A

0.85A

Sine wave translated

up to 0.15A

Ideal sine wave

0.2A

0.05A

0.2A

Reference

line zero

0.05A

0.3A

0.2A

0.3D

A = Peak value = 30 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 acceleration amplitude of the ideal half sine pulse is A 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 2AD/. The

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

0.1D after the pulse.

FIGURE 2. Half-sine shock pulse configuration and tolerance limits.