MIL-PRF-38169A
3.4
First article. When specified, two visor and goggle lenses of each class shall be subjected
to the first article test in accordance with 4.2.
3.5
Interchangeability. All parts having the same manufacturer's part number shall be
functionally and dimensionally interchangeable.
3.6
Toxic chemicals, hazardous substances, and ozone depleting chemicals (ODCs). The use
of toxic chemicals, hazardous substances, or ODCs shall be avoided, whenever feasible.
4.
VERIFICATION
4.1
Classification of inspections and tests. The inspection and testing of the visor and goggle
lenses shall be classified as follows:
a.
First article tests (see 4.2)
b.
Conformance tests (see 4.3)
4.2
First article test. First article test shall consist of all tests in 4.4.
4.3
Conformance tests. Conformance tests shall consist of:
a.
Individual tests
b.
Sampling tests
4.3.1 Individual tests. Each visor and goggle lens shall be subjected to the examination of
product test (see 4.4.1).
4.3.2 Sampling tests.
4.3.2.1 Sampling. Each lot of completed lenses shall be subjected to the tests listed below in
accordance with an appropriate plan selected from ANSI/ASQC Z1.4 or another commercially
acceptable sampling procedure.
a.
Class 1, 2, and 3 lenses
(1)
Refractive power (see 4.4.3)
(2)
Prismatic deviation (see 4.4.2)
(3)
Luminous transmittance (see 4.4.4)
(4)
Optical distortion (see 4.4.5)
(5)
Haze (see 4.4.6)
6
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