MIL-PRF-49169B(CR)
4.4.2.2.1. Sampling for Group B inspection. Group B inspection samples shall be selected as
follows:
TABLE IV GROUP B INSPECTION
INSPECTION
REQ'T
TEST
PARA.
PARA.
Radiated power output
3.6.1
4.5.1
LED module tracking
3.6.4
4.5.4
LED wavelength
3.6.5
4.5.5
TABLE IV-1 Group B Inspection Sampling.
MONTHLY
# OF SAMPLE
LOT SIZE
UNITS
MONTHLY
1 - 99
1
100 - 299
3
300 - 499
5
500 - 999
7
1000 or more
10
4.4.2.2.2. Group B failures. Actions required relative to Group B failures shall be as specified in
the contract (see 6.2).
4.4.2.2.3. Disposition of Group B samples. Group B samples shall be accepted on contract
subsequent to the tests of Table III.
4.4.2.4. Group D inspection. Not required.
4.5. Test methods. Unless otherwise specified, all bias voltage tolerances shall be ±0.1 Vdc.
4.5.1. Radiated power output. The total radiated power output from each emitting element shall
be measured at ambient, -54° C and +71° C with the LED module in its final assembled
configuration. This test may be performed in conjunction with temperature tests 4.6.2 and 4.6.3.
The emitted power is defined as the power radiated through the field flattener lens without
applying any correction for the transmission losses due to the lens. The radiated power output
shall be measured using a suitable detector of area (A) calibrated at 660 nanometers and
positioned a distance (D) from the radiation source. The optical arrangement for this test is not
critical, except that the solid angle of the cone of radiation subtended at the detector from the
center element of the diode array shall not be greater than 0.2 steradian. The center of the
detector shall be on the optical axis of the field flattener. The total radiated power output shall be
calculated using the following equation:
8
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