MIL-PRF-49318A(CR)
3.5.9 Optical instrument case. The optical instrument case shall accommodate the
Assessor in its carrying bag, adapters for all the applicable systems, it is to test, lens tissue
paper, a battery and an operator's manual.
3.5.10 Input current. Each Assessor shall require less than 5mA when operated in any of
the required test modes and shall not be damaged when subjected to polarity reversal due to
inadvertent reversal of the battery. Component operation shall be normal when proper polarity
is restored.
3.5.11 Test modes. A total of 4 modes shall be provided by the Assessor according to the
following matrix:
Switch Position (Switch II/III)
Switch Position (Switch HIGH/LOW)
HIGH
LOW
PVS-5, 7
II (Gen II)
PVS-4, 5, 7
TVS-5, VVS-2
High Light Test
Low Light Test
III (GEN III)
ANVIS High
ANVIS Low
Light Test
Light Test
3.5.12 Light levels. All light levels shall remain within the specific range throughout the
required operational temperature range of +52°C to -32°C. A total of four light levels shall be
provided by the Assessor according to the following matrix:
Switch Position (Switch II/III)
Switch Position (Switch HIGH/LOW)
On axis output radiance (w/ (sr*cm2) )
HIGH
LOW
± 50 percent
± 20 percent
C*8.3*10-9
3.41*10-11
II (GEN II)
C*3.9*10-9
1.52*10-11
III (GEN III)
Where C = (22mm/ (NVDA exit pupil diameter) )2
3.5.13 Field of view (FOV). The Assessor shall have a lighted apparent FOV of 30
degrees minimum and shall not be vignetted as observed by the following systems:
AN/AVS-6(V)1, (V)2, AN/PVS-4, AN/TVS-5, AN/VVS-2(V) 1A, 2A and 3. The contractor
shall accommodate the following fields of view:
40
degree minimum FOV of all required goggles
- AN/AVS-6(V)1, (V)2.
15
degree minimum FOV
- AN/PVS-4.
9
degree minimum FOV
- AN/TVS-5.
45
degree width x 38 degree height FOV
- AN/VVS-2 (V) 1A, 2A and 3.
3.5.14 Reliability. The Assessor shall have a minimum Mean Time Between Failure
(MTBF) of 10,000 hours. Use of MIL-HDBK-781 is recommended for reliability
determination.
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