Nikon Optiphot Repair Manual page 111

,,-·
R-4106.A
ADJUSTMENT
1. Depression Prism Unit
2) If, in this case, such a center displacement cannot be corrected by moving the lens chamber
G),
make adjustment of prism
'B ,
as below:
a) For lateral adjustment, place a piece of silver foil (0.1
mm
thick) undemeath, as shown
in
Fig.
31,
to cause a movement corresponding to
5
scale Unes.
b) For vertical adjustment, move prism
@
along the wall of prism mount
(D,
as shown
in Fig. 31.
Fig.
31
(F·tube)
1)
Moving lens chamber
®
(with
@)
and
·'.§
inside), make the displacement within a range
of 2 scale Unes in the Kellner eyepiece.
2) If the center displacement cannot be corrected by moving chamber
®·
make adjustment of
prism
@ ,
as below:
P1ace a piece of silver foil (0.1 mm thick) underneath, as shown in Fig. 32, to cause a movement
corresponding to 5 lines.
-41-
Silvcr foil
Eycpicce saile
A
B
The center displacement
direction of the test plate
by
a piece of illver foil (A, B)
Fig. 32