 |
|||
|
|
|||
| ||||||||||
|
|  MIL-P-4845lA(MU)
sight through the periscope reticle boresight cross shall not exceed the
values specified in 3.8.3.1.1c to determine overall conformance with the
requirements specified therein.
4.6.6.4 Passive viewing area.
4.6.6.4.1 Elevation knob travel.- Establish coincidence of the peri-
scope reticle boresight cross and the projected target image crosslines
by means of the boresight knobs. While observing the boresight cross
(intersecting point), rotate the elevation knob in the clockwise direction.
The boresight cross shall travel as specified in 3.8.3.1.2a as measured
on the target. Re-establish coincidence of the reticle boresight cross
and the projected target image crosslines by means of the boresight knobs.
While observing the boresight cross, rotate the elevation knob in the
counterclockwise direction. The boresight cross shall travel as specified
in 3.8.3.l.2a as measured on the target.
4.6.6.4.2 Deflection knob travel.- Perform this test utilizing the
procedure in 4.6.6.4.l except, the deflection knob shall be rotated in
the clockwise and counterclockwise direction. Boresight cross (inter-
secting point) travel shall meet the requirements specified in 3.8.3.l.2b
as measured on the target.
4.6.6.4.3 Line of sight variation.- Establish coincidence of the
periscope reticle boresight cross and the projected target image cross-
lines by means of the boresight knobs. While observing the intersecting
point of the reticle boresight cross, rotate the deflection knob to its
clockwise stop. During this rotation of the deflection knob, any varia-
tion in elevation in the line of sight through the periscope reticle bore-
sight cross, shall not exceed the values specified in 3.8.3.1.2c. Rees-
tablish coincidence of the periscope reticle boresight cross and the pro-
jected target image crosslines by means of the boresight knobs. While
observing the intersecting point of the periscope reticle boresight cross,
rotate the deflection knob to its counterclockwise stop. During this ro-
tation of the deflection knob, any variation in elevation in the line of
sight through the periscope reticle boresight cross shall not exceed the
values specified in 3.8.3.1.2c to determine overall conformance with re-
quirements specified therein.
4.6.6.5 Image tilt- daylight and passive.- The daylight and passive
optical systems of the periscope shall be inspected utilizing holder "T"
containing telescope "J" with special reticle "L" (Ref. Dwg. F11746743
Final Acceptance Test Equipment and Arrangement Drawing). The vertical
reticle line of the telescope-shall be aligned plumb when in the test
position on a qualified level surface. With the aid of the auxiliary
telescope, view through the passive eyepiece of the periscope and estab-
lish the telescopes reticle crosslines coincident to the target image cross-
lines. The image of the vertical target line shall be parallel to the tele-
scope vertical reticle line within the tolerance specified in 3.8.5, as de-
termined by the tolerance gates provided on the telescope reticle. Repeat
the above procedure with telescope positioned at the daylight eyepiece of
the periscope. The images formed by the two optical systems (daylight and
passive) of the periscope shall meet the requirements specified in 3.8.5.
19
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals