 |
|||
|
|
|||
| ||||||||||
|
|  MIL-P-48619(AR)
half sine wave with a time duration of 18 + 3 mini-seconds.
Subsequent to shock, there shall be no failure or flicker of light
emission from the image tube nor the reticle projector lamp. The
periscope shall also show no evidence of physical failure.
Following the shock test, the periscope shall meet the requirements
of 3.8.3.2, 3.8.4.1, 3.8.9, 3.8.2, 3.8.3.1.1. 3.8.3.1.2, 3.8.5,
3.8.6, 3.8.6.1, 3.8.7, 3.8.8, 3.2, 3.1, 3.7 and then each module
(see 3.1) shall meet their own respective post-shock test
requirements.
3.7 Cleanliness. -With the periscope disassembled, the three
modular units shall meet the following requirements:
a. Defects. -There shall be no evidence of moisture, grease,
fingerprints-conddensates, fractures and adhesive separations on any
glass component when viewing through either end of each module
(including the unity power system).
b.
Dirt.
(1) Body assembly (Daylight). -When viewed through the
eyepiece shall be no more than three dirt particles appearing within
a 56 mil diameter central field of view. There shall be no more
than three dirt particles appearing outside the specified field of
view. The angular separation between dirt particles shall be at
least 15 mils. Dirt particles smaller than 1/4 reticle line width
shall be ignored regardless of distribution. The size of any
particle shall not exceed the apparent width of the reticle line.
(2) Elbow assembly (Passive). -When viewing through the
eyepiece with the image intensifier tube energized, there shall be
no more than five particles visible on the screen surface. The size
of any particle shall not exceed the apparent width of the reticle
line.
(3) Head Assembly. -There shall be no more than three
particles of dirt or foreign material (classed as dirt) on any glass
component. The size of any dirt particle shall not exceed 0.05 inch.
3.8 Performance.
3.8.1 Orientation.
a. Datum Plane "W" (Ref. Dwg. 11747441) defined by the three
mounting pads in a vertical plane. Datum Plane "Y" (Ref. Dwg.
11747439) on a horizontal plane.
7
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals