MIL-PRF-49148D(CR)
2.1.1 Reference documents, drawings and publications. The following
other Government documents, drawings and publications form a part of this
document to the extent specified herein. Unless otherwise specified, the
issues are those cited in the solicitation (see 6.2.f).
DRAWINGS
USA COMMUNICATIONS-ELECTRONICS COMMAND
SM-D-771334
-
Barrel Assembly, Lens, Objective
(Copies of Specifications, standards, drawings, and publications required
by contractors in connection with specific procurement functions should be
obtained from the procuring activity or as directed by the contracting
officer.)
2.2 Order of precedence. In the event of a conflict between the text of
this specification and the references cited herein, the text of this
specification takes precedence. Nothing in this specification, however,
supersedes applicable laws and regulations unless a specific exemption has been
obtained.
3.
REQUIREMENTS
3.1 Description. The objective lens assembly is mounted to and is part
of the Viewer, Driver's Night Vision AN/VVS-2(V).
3.2 Construction. The objective lens assembly shall be constructed to
assure compliance with the contract configuration baseline and in accordance
with SM-D-771334 as applicable.
3.3. First article test (FAT). When specified in the contract (see 6.2.e
and 6.2.h) the contractor shall furnish units for FAT inspection and approval
(see 4.2).
3.4 Materials. The contractor shall select parts and materials that are
fully capable of meeting all operational and environmental requirements
specified herein. The materials specified in the applicable drawings are
recommended, but not mandatory. Selection criteria of the class, grade or type
part shall ensure the material will be able to perform its intended function
when it is assembled. Verification of the supplier meeting the overall
performance requirements shall be the governing acceptance standard. Recovered
materials shall be used to the maximum extent possible.
3.5
Performance characteristics.
3.5.1 Effective focal length. The objective lens shall have an Effective
Focal Length (EFL) of 33.6, ± 0.5 millimeters (mm).
3.5.2 Field of view. The field of view shall be not less than 44 degrees
for a 25mm diameter format.
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