MIL-PRF-49148D(CR)
3.10.4 Degradation of performance. Any deterioration in quality, or
failure to operate with the requirements of this specification.
3.10.5 "g". "g" is defined as an acceleration or deceleration of 32.17
feet per second per second.
4.
VERIFICATION
4.1
Classification of inspections.
Inspections shall be classified as
follows:
a.
First article tests (4.2)
b.
Conformance inspection (4.3)
4.2 First Article Test (FAT). When specified in the contract or purchase
order (see 6.2.h), first article testing shall be performed by the contractor.
The quantity of first article test samples shall be as specified in the
contract or purchase order(see 6.2.e) and shall be selected from the first
production lot.
4.2.1 FAT Tests. Each objective lens in the first production lot shall
be subjected to the performance tests of Table II. After completion of this
test, objective lens assemblies selected as samples for FAT testing shall be
subjected to the tests of Table III which may be performed in any order except
that Immersion shall be performed last. Failure of any test shall be cause for
rejection of that objective lens and may be cause for rejection of the FAT.
TABLE II.
Unit first article testing.
Requirement
Inspection
Paragraph
Effective focal length
3.5.1
Field of view
3.5.2
Linear distortion
3.5.3
Modulation transfer function
3.5.4
T-number
3.5.5
Veiling glare
3.5.6
Flange focal length
3.5.7
Table III Sample first article testing
Requirement
Inspection
Paragraph
Temperature Extremes
3.6.1
Vibration
3.6.2
Shock
3.6.3
Immersion
3.6.4
4.2.1 Disposition of FAT samples. Disposition of FAT samples shall be
as specified in the contract or purchase order (see 6.2.e).
4.3 Conformance inspection. Requirements for conformance inspection
shall be as specified in the contract or purchase order (see 6.2.g). Unless
otherwise specified, all tests shall be performed at ambient temperature (see
3.10.2).
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